Rainbow Electronics MAX98089 User Manual

E V A L U A T I O N K IT A V A I L A B L E

19-5865; Rev 0; 6/11

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

General Description

The MAX98089 is a full-featured audio codec whose high performance and low power consumption make it ideal for portable applications.

Class D speaker amplifiers provide efficient amplification for two speakers. Low radiated emissions enable completely filterless operation. Integrated bypass switches optionally connect an external amplifier to the transducer when the Class D amplifiers are disabled.

The IC features a stereo Class H headphone amplifier that utilizes a dual-mode charge pump to maximize efficiency while outputting a ground referenced signal that does not require output coupling capacitors.

The IC also features a mono differential amplifier that can also be configured as a stereo line output.

Two differential analog microphone inputs are available as well as support for two PDM digital microphones. Integrated switches allow for an additional microphone input as well as microphone signals to be routed out to external devices. Two flexible single-ended or differential line inputs may be connected to an FM radio or other sources.

Integrated FlexSoundK technology improves loudspeaker performance by optimizing the signal level and frequency response while limiting the maximum distortion and power at the output to prevent speaker damage. Automatic gain control (AGC) and a noise gate optimize the signal level of microphone input signals to make best use of the ADC dynamic range.

The device is fully specified over the -40NC to +85NC extended temperature range.

FlexSound is a trademark of Maxim Integrated Products, Inc.

Features

S 5.6mW Power Comsumption (DAC to HP at 97dB DR)

101dB DR Stereo DAC (8kHz < f

S

93dB DR Stereo ADC (8kHz < f

S

Stereo Low EMI Class D Amplifiers

S

1.7W/Channel (8I, V

2.9W/Channel (4I, V

Efficient Class H Headphone Amplifier

S

Differential Receiver Amplifier/Stereo Line Outputs

S

2 Stereo Single-Ended/Mono Differential Line

S

SPK�VDD SPK�VDD

< 96kHz)

S

< 96kHz)

S

= 5.0V) = 5.0V)

Inputs

3 Differential Microphone Inputs

S

FlexSound Technology

S

5-Band Parametric EQ Automatic Level Control (ALC) Excursion Limiter Speaker Power Limiter Speaker Distortion Limiter Microphone Automatic Gain Control and Noise Gate

Dual I

S

Asynchronous Digital Mixing

S

Supports Master Clock Frequencies from 10MHz

S

2

S/PCM/TDM Digital Audio Interfaces

to 60MHz

RF Immune Analog Inputs and Outputs

S

Extensive Click-and-Pop Reduction Circuitry

S

Available in 63-Bump WLP Package (3.80mm x

S

3.30mm, 0.4mm Pitch) and 56-Pin TQFN Package (7mm x 7mm x 0.75mm)

Ordering Information appears at end of data sheet.

For related parts and recommended products to use with this part, refer to www.maxim-ic.com/MAX98089.related.

Simplified Block Diagram

2

I2S/PCM

S/PCM

I

DIGITAL

INTERFACE

FLEXSOUND

• 5-BAND PARAMETRIC EQ

• AUTOMATIC LEVEL CONTROL

• LOUDSPEAKER PROCESSING

• EXCURSION LIMITER

• THD LIMITER

• POWER LIMITER

• MICROPHONE PROCESSING

• AUTOMATIC GAIN CONTROL

• NOISE GATE

• ASYNCHRONOUS DIGITAL MIXING

AUDIO

TECHNOLOGY

MAX98089

AUDIO

INTERFACE

RECEIVER/LINEOUT AMPS

DAC

SPEAKER AMP

MIX

HEADPHONE AMP

LINEIN A1

LINEIN A2

LINEIN B1

LINEIN B2

DIGITAL MICROPHONE

+

I2C

CONTROL

INPUT

ADC

MIX

ADC

�� Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

TABLE OF CONTENTS

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Features

Simplified Block Diagram

Functional Diagram

Absolute Maximum Ratings

Electrical Characteristics

Digital Input/Output Characteristics

Input Clock Characteristics

Audio Interface Timing Characteristics

Digital Microphone Timing Characterstics

2

I

Power Consumption

Typical Operating Characteristics

Pin Configuration

Pin Description

Detailed Description

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

C Timing Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Microphone to ADC

Line to ADC

Line-In Pin Direct to ADC

Digital Loopback

Analog Loopback

DAC to Receiver

Line to Receiver

DAC-to-Line Output

Line-to-Line Output

DAC to Speaker

Line to Speaker

DAC to Headphone

Line to Headphone

Speaker Bypass Switch

2

C Slave Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

I

Registers

Power Management

Microphone Inputs

Line Inputs

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

�� Maxim Integrated Products 2

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

TABLE OF CONTENTS (continued)

ADC Input Mixers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Record Path Signal Processing

Microphone AGC

Noise Gate

ADC Record Level Control

Sidetone

Digital Audio Interfaces

Clock Control

Sample Rate Converter

Passband Filtering

Playback Path Signal Processing

Playback Level Control

DAC Input Mixers

Receiver Amplifier

Speaker Amplifiers

Speaker Amplifier Signal Processing

Headphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Output Bypass Switches

Click-and-Pop Reduction

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Automatic Level Control

Parametric Equalizer

Receiver Output Mixer

Receiver Output Volume

Speaker Output Mixers

Excursion Limiter

Speaker Output Volume

Power Limiter

Distortion Limiter

DirectDrive Headphone Amplifier

Charge Pump

Class H Operation

Headphone Ground Sense (HPSNS)

Headphone Output Mixers

Headphone Output Volume

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

�� Maxim Integrated Products 3

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

TABLE OF CONTENTS (continued)

Jack Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Jack Insertion

Accessory Button Detection

Jack Removal

Battery Measurement

Device Status

2

C Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

I

Bit Transfer

START and STOP Conditions

Early STOP Conditions

Device Revision

Slave Address

Acknowledge

Write Data Format

Read Data Format

Applications Information

Typical Operating Circuits

Filterless Class D Operation

RF Susceptibility

Startup/Shutdown Sequencing

Component Selection

Optional Ferrite Bead Filter

Input Capacitor

Charge-Pump Capacitor Selection

Charge-Pump Flying Capacitor

Charge-Pump Holding Capacitors

Unused Pins

Recommended PCB Routing

Supply Bypassing, Layout, and Grounding

WLP Applications Information

Ordering Information

Package Information

Revision History

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

�� Maxim Integrated Products 4

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Functional Diagram

F6

REF G6

REG

BIAS

MAX98089

G5

AVDD

G4

DVDD

SDIN2

DATA

INPUT

HIZOFF2

SDOUT2

DATA

OUTPUT

PORT S2PORT S1

LRCLKS2 SDOUTS2 SDINS2 DVDDS2

LRCLKS1 SDOUTS1 SDINS1 DVDDS1 BCLKS2

D1 D4 D2 E4 E1 F2 F3 G1 G3 G2

BCLKS1

MCLK

MAS2

LRCLK2

FRAME

CLOCK

BIT

BCLK2

SDIN1

SDOUT1

LRCLK1

BCLK1

SEL1 SEL2

CLOCK

MAS2

DAI2

DATA

INPUT

HIZOFF1 SDIEN1 SDIEN2

DATA

OUTPUT

MAS1

FRAME

CLOCK

BIT

CLOCK

MAS1

DAI1

A6

RECP/

RXINP

RECN/

LOUTL/

RECBYP

RECLEN

0dB

RECVOLL:

+8dB TO -62dB

RECVOLR:

+8dB TO -62dB

MIX

MIXRECL

LBEN1

DV1G:

0/6/12/18dB

+

LTEN1

DVST:

0dB TO -60dB

MUX

LBEN2

CLOCK

RXINN B6

LOUTR/

0dB

MIX

TM

TECHNOLOGY

FLEXSOUND

+

MIX

SIDETONE

CONTROL

SPKBYP

RECREN

LINEMODE

MULTI BAND ALC

DSTS

A3, B3

SPKLVDD

MIXRECR

DVEQ2:

DVEQ1:

SPVOLL:

+8dB TO -62dB

0dB TO -15dB

A4, B4

SPKLP

AUTOMATIC

A5, B5

SPKLN

+6dB

MIX

5-BAND

PARAMETRIC

5-BAND

PARAMETRIC

NOISE GATE

GAIN

SPLEN

EQ

CONTROL

C4, C5

SPKLGND

SPKRVDD C3, D3

POWER/

DISTORTION LIMITER

MIXSPL

DACL

MIX

EXCURSION LIMITER

EQ1EN EQ2EN

VOICE

AUDIO/

FILTERS

AVFLT

MODE1

DALEN

AVRG: 0/6/

AVLG: 0/6/

MIXDAL

AUDIO

ADLEN

12/18dB

SPKRP C1, C2

FILTERS

ADCL

MIX

DV2:

AVR:0dB

AVL:0dB

+6dB

TO -15dB

SPKRN A1, B1

SPREN

MIX

DCB2

0dB TO -15dB

SAMPLE RATE

SPKRGND A2, B2

SPVOLR:

+8dB TO -62dB

MIXSPR

CONVERTER

SRMIX_

MIXADL

MIXHPL_

AUDIO/

HPVOLL:

PATH SEL

VOICE

ADCR

C9

HPL

+3dB TO -67dB

MIX

DACR

MIX

FILTERS

MODE1

DV1:

0dB TO -15dB

ADREN

MIX

DAREN

DVFLT

HPLEN

MIXHPL

MIXDAR

MIXADR

C8

HPSNS

HPVOR:

+3dB TO -67dB

MIXHPR_

PATH SEL

MIX

A9

HPR D9

PVDD A7

HPGND

B7B8A8

HPREN

HPVSS

PUMP

CHARGE

B9

HPVDD C1N C1P

MIXHPR

C6, C7, D5, D6, D7, E3

N.C.

G7

AGND

F1

DGND

0/20/30dB

INABYP

PGAINA:

+20dB TO -6dB

INADIFF

INA1/EXTMICP

F9

MIC1N/

DIGMICCLK

F8

PA1EN:

EXTMIC

0/20/30dB

MIC2BYP

PGAM2:

+20dB TO 0dB

G9 MIC2P

PA2EN:

EXTMIC

G8 MIC2N

PGAM1:

+20dB TO 0dB

E5F5F4 E2

IRQ

C

2

I

SCL

SDA

JACK

JACKSNS

E6

DETECTION

JDETEN

REG

MBEN

MIC1P/

MICBIAS

F7

DIGMICDATA

E8

PGAINA:

+20dB TO -6dB

INA2/EXTMICN

E9

INBDIFF

PGAINB:

+20dB TO -6dB

PGAINB:

+20dB TO -6dB

+

INB2

INB1

E7

D8

NOTE: BUMP NUMBERS SHOWN FOR WLP PACKAGE.

SEE THE PIN DESCRIPTION SECTION FOR TQFN PINOUT.

�� Maxim Integrated Products 5

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

ABSOLUTE MAXIMUM RATINGS

(Voltages with respect to AGND.) DVDD, AVDD, PVDD, HPVDD SPKLVDD, SPKRVDD, DVDDS1, DVDDS2 DGND, HPGND, SPKLGND, SPKRGND HPVSS

............................... (HPGND - 2.2V) to (HPGND + 0.3V)

C1N

.................................... (HPVSS - 0.3V) to (HPGND + 0.3V)

C1P

.....................................(HPGND - 0.3V) to (HPVDD + 0.3V)

REF, MICBIAS

................................. -0.3V to (SPKLVDD + 0.3V)

..............................-0.3V to +2.2V

..........-0.3V to +6.0V

..............-0.1V to +0.1V

MCLK, SDINS1, SDINS2, JACKSNS,

SDA, SCL, IRQ

LRCLKS1, BCLKS1, SDOUTS1 LRCLKS2, BCLKS2, SDOUTS2

.................................................-0.3V to +6.0V

......... -0.3V to (DVDDS1 + 0.3V)

......... -0.3V to (DVDDS2 + 0.3V)

REG, INA1/EXTMICP, INA2/EXTMICN, INB1, INB2,

MIC1P/DIGMICDATA, MIC1N/DIGMICCLK, MIC2P, MIC2N

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

..................................................-0.3V to +2.2V

ELECTRICAL CHARACTERISTICS

(V

= V

AVDD

SPK_P and SPK_N. Receiver load (R to HPGND. Line out loads (R

2.2FF, C 0dB, AV

MICBIAS

DACGAIN

= 12.288MHz, LRCLK = 48kHz, MAS = 0. T

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

POWER SUPPLY

Supply Voltage Range Guaranteed by PSRR

Total Supply Current (Notes 2 and 3)

Shutdown Supply Current (Note 2)

REF Voltage 2.5 V REG Voltage 0.79 V

Shutdown to Full Operation

PVDD

= V

DVDD

= C

REG

= 0dB, AV

= V

DVDDS1

LOUT

= 1FF, C

ADCLVL

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

DVDDS2

= 1.8V, V

SPKLVDD

) connected from LOUTL or LOUTR to SPKLGND. R

C1N-C1P

= 0dB, AV

= 1FF, C

ADCGAIN

= T

A

MIN

HPVDD

= 0dB, AV

to T

= C

HPVSS

PGAIN_

, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)

MAX

Full-duplex 8kHz mono, receiver output, MAS = 1

DAC playback 48kHz

I

VDD

stereo, headphone outputs, MAS = 1

DAC playback 48kHz stereo, speaker outputs, MAS = 1

T

= +25NC

A

VSEN = 0 VSEN = 1

............................... (HPGND - 0.3V) to (HPGND + 0.3V)

HPSNS HPL, HPR

............................(HPVSS - 0.3V) to (HPVDD + 0.3V)

RECP/LOUTL/RXINP, RECP/LOUTR/

RXINN

.....................(SPKLGND - 0.3V) to (SPKLVDD + 0.3V)

SPKLP, SPKLN SPKRP, SPKRN Continuous Power Dissipation (T

...........(SPKLGND - 0.3V) to (SPKLVDD + 0.3V)

.........(SPKRGND - 0.3V) to (SPKRVDD + 0.3V)

= +70NC)

A

63-Bump WLP (derate 25.6mW/NC above +70NC)

56-Pin TQFN (derate 40mW/NC above +70NC) Operating Temperature Range Storage Temperature Range Soldering Temperature (reflow)

= V

SPKRVDD

= 1FF. AV

= 0dB, AV

V

SPKLVDD

DVDD

V

DVDDS1

= 3.7V. Speaker loads (Z

= RHP = J, R

LOAD

, V

AVDD

, V

DVDDS2

HP_

SPKRVDD

= +20dB, AV = 0dB, AV

, V

PVDD

MICPRE_

, V

.......................... -40NC to +85NC

............................ -65NC to +150NC

......................................+260NC

) connected between

SPK

= J, Z

REC

MICPGA_

REC

= 0dB, AV

SPK_

2.8 5.5

1.65 1.8 2

1.65 3.6 Analog 4.5 8 Speaker 1.6 2.3 Digital 1.3 2 Analog 1.9 3 Speaker 0.001 0.0058 Digital 2.47 3.5 Analog 3.6 6.5 Speaker 6.41 8.5 Digital 2.49 3.5 Analog 0.2 2 Speaker 0.01 1 Digital 1 5

30 17

........2.05W

...............3.2W

= J, C

SPK

REF

DACATTN

= 0dB, MCLK

mA

FA

ms

= =

VV

�� Maxim Integrated Products 6

Low-Power, Stereo Audio Codec

with FlexSound Technology

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

AVDD

SPK_P and SPK_N. Receiver load (R to HPGND. Line out loads (R

2.2FF, C 0dB, AV

MICBIAS

DACGAIN

= 12.288MHz, LRCLK = 48kHz, MAS = 0. T

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MICROPHONE TO ADC PATH

Dynamic Range DR

Total Harmonic Distortion + Noise

Common-Mode Rejection Ratio

Power-Supply Rejection Ratio PSRR

Path Phase Delay

MICROPHONE PREAMP

Full-Scale Input AV

Preamplifier Gain AV

PGA Gain AV

MIC Input Resistance R

PVDD

= V

DVDD

= C

REG

= 0dB, AV

= V

DVDDS1

LOUT

= 1FF, C

ADCLVL

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

DVDDS2

= 1.8V, V

SPKLVDD

) connected from LOUTL or LOUTR to SPKLGND. R

C1N-C1P

= 0dB, AV

= 1FF, C

ADCGAIN

= T

A

MIN

= 8kHz, MODE = 0 (IIR voice), AV

f

S

HPVDD

= 0dB, AV

to T

= C

HPVSS

PGAIN_

, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)

MAX

(Note 4)

V

THD+N

CMRR V

= 0.1V

IN

MICPRE_

AV

MICPRE_

= 100mV

IN

V

AVDD

, fS = 8kHz, f = 1kHz -78

P-P

= 0dB, VIN = 1V

= +30dB, VIN = 32mV

, f = 217Hz 74 dB

P-P

= 1.65V to 1.95V, input referred,

MIC inputs floating

= 200mV

RIPPLE

f = 1kHz, V f = 10kHz, V

RIPPLE

= 200mV

1kHz, 0dB input, highpass filter disabled measured from analog input to digital output

= 0dB 1.05 V

MICPRE_

MICPGA_

IN_MIC

MICPRE_

(Note 5)

All gain settings, measured at MIC1P/ MIC1N/MIC2P/MIC2N

MAX98089

= V

SPKRVDD

= 1FF. AV

= 0dB, AV

P-P

MODE = 0 (IIR voice) 8kHz

MODE = 0 (IIR voice) 16kHz

MODE = 1 (FIR audio) 8kHz

MODE = 1 (FIR audio) 48kHz

PA1EN/PA2EN = 01 0

PA1EN/PA2EN = 11 29.5 30 30.5 PGAM1/PGAM2 = 0x00 19 20 21 PGAM1/PGAM2 = 0x14

= 3.7V. Speaker loads (Z

= RHP = J, R

LOAD

HP_

MICPRE_

= +20dB, AV = 0dB, AV

REC

= 0dB

MICPRE_

SPK

= J, Z

REC

MICPGA_

= 0dB, AV

88 dB

, f = 1kHz -85

, f = 1kHz -71

P-P

50 62

, input referred 62

, input referred 55

2.2

1.1

4.5

0.76

50

) connected between

= 0dB, AV

SPK_

0

= J, C

SPK

DACATTN

= 0dB, MCLK

REF

dBAV

dBf = 217Hz, V

ms

P-P

dBPA1EN/PA2EN = 10 19.5 20 20.5

dB

kI

= =

�� Maxim Integrated Products 7

Low-Power, Stereo Audio Codec

with FlexSound Technology

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

AVDD

SPK_P and SPK_N. Receiver load (R to HPGND. Line out loads (R

2.2FF, C 0dB, AV

MICBIAS

DACGAIN

= 12.288MHz, LRCLK = 48kHz, MAS = 0. T

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MICROPHONE BIAS

MICBIAS Output Voltage V Load Regulation I Line Regulation V

Ripple Rejection

Noise Voltage

MICROPHONE BYPASS SWITCH

On-Resistance R

Total Harmonic Distortion + Noise

Off-Isolation

Off-Leakage Current

LINE INPUT TO ADC PATH

Dynamic Range (Note 4) DR

Total Harmonic Distortion + Noise

Gain Error

Power-Supply Rejection Ratio PSRR

PVDD

= V

DVDD

= C

REG

= 0dB, AV

= V

DVDDS1

LOUT

= 1FF, C

ADCLVL

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

DVDDS2

= 1.8V, V

SPKLVDD

) connected from LOUTL or LOUTR to SPKLGND. R

C1N-C1P

MICBIASILOAD

= 1FF, C

= 0dB, AV

A

ADCGAIN

= T

LOAD

SPKLVDD

f = 217Hz, V f = 10kHz, V

MIN

= 1mA 2.15 2.2 2.25 V = 1mA to 2mA 0.5 4.5 mV

= C

HPVDD

to T

HPVSS

= 0dB, AV

MAX

PGAIN_

, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)

= 2.8V to 5.5V 110

RIPPLE (SPKLVDD)

A-weighted, f = 20Hz to 20kHz 3.9 P-weighted, f = 20Hz to 4kHz 2.1 f = 1kHz 50

I

= 100mA, INABYP = MIC2BYP = 1,

ON

THD+N

MIC1_

V

MIC2_

V

IN

= V

= 2V

= 0V, AVDD, TA = +25NC

INA_

, VCM = 0.9V, RL = 10kI,

P-P

f = 1kHz, INABYP = MIC2BYP = 1

V

IN

V

MIC1_

= 2V

, VCM = 0.9V, RL = 10kI, f = 1kHz

P-P

= [0V, AVDD], V

[AVDD, 0V]

INA pin direct, f

= 48kHz, MODE = 1

S

(FIR audio)

THD+N V

IN

= 1V

, f = 1kHz -82 -74 dB

P-P

DC accuracy 1 %

V

= 1.65V to 1.95V, input referred,

AVDD

line inputs floating, T

f = 217Hz, V AV

ADC

f = 1kHz, V AV

ADC

f = 10kHz, V AV

ADC

RIPPLE

= 0dB, input referred

RIPPLE

= 0dB, input referred

RIPPLE

= 0dB, input referred

A

= 200mV

= V

SPKRVDD

= 1FF. AV

= 0dB, AV

= 100mV = 100mV

MIC2_/VINA_

= +25NC

P-P

,

P-P

= 3.7V. Speaker loads (Z

= RHP = J, R

LOAD

MICPRE_

= +20dB, AV = 0dB, AV

HP_

P-P

=

,

MAX98089

) connected between

SPK

= J, Z

REC

MICPGA_

= 0dB, AV

REC

-1 +1

57 68

SPK

= 0dB, AV

SPK_

92 83

5 30

-80 dB

60 dB

93 dB

63

57

= J, C

DACATTN

REF

= =

= 0dB, MCLK

FV

dB

FV

RMS

nV/√Hz

I

FA

dB

�� Maxim Integrated Products 8

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

AVDD

SPK_P and SPK_N. Receiver load (R to HPGND. Line out loads (R

2.2FF, C 0dB, AV

MICBIAS

DACGAIN

= 12.288MHz, LRCLK = 48kHz, MAS = 0. T

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

LINE INPUT PREAMP

Full-Scale Input V

Level Adjust Gain AV

Input Resistance R

Feedback Resistance R

ADC LEVEL CONTROL

ADC Level Adjust Range AV ADC Level Step Size 1 dB ADC Gain Adjust Range AV ADC Gain Adjust Step Size 6 dB

ADC DIGITAL FILTERS VOICE MODE IIR LOWPASS FILTER (MODE1 = 0)

Passband Cutoff f

Passband Ripple f < f Stopband Cutoff f

Stopband Attenuation (Note 6)

PVDD

= V

DVDD

= C

REG

= 0dB, AV

= V

DVDDS1

LOUT

= 1FF, C

ADCLVL

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

) connected from LOUTL or LOUTR to SPKLGND. R

C1N-C1P

= 0dB, AV

IN

DVDDS2

= 1FF, C

ADCGAIN

= T

A

MIN

AV

PGAIN_

AV

PGAIN_

= 1.8V, V

HPVDD

= 0dB, AV

to T

MAX

SPKLVDD

= C

HPVSS

PGAIN_

= V

SPKRVDD

= 1FF. AV

= 0dB, AV

= 3.7V. Speaker loads (Z

= RHP = J, R

LOAD

MICPRE_

= +20dB, AV = 0dB, AV

HP_

REC

, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)

= 0dB 1 = -6dB 1.4

SPK

= J, Z

REC

MICPGA_

= 0dB, AV

) connected between

SPK

= 0dB, AV

SPK_

PGAINA/PGAINB = 0x0 19 20 21 PGAINA/PGAINB = 0x1 13 14 15 PGAINA/PGAINB = 0x2 2 3 4 PGAINA/PGAINB = 0x3 0 PGAINA/PGAINB = 0x4 -4 -3 -2

PGAINA/PGAINB = 0x5, 0x6, 0x7

= +25NC

T

A

T

= T

MIN

to T

MAX

A

-7 -6 -5

18 20 22 16 24

-0.1 +0.1 dB

74 dB

PGAIN_

IN

IN_FB

ADCLVL

ADCGAIN

PLP

SLP

TA = +25NC (Note 5)

AV AV AV AV AV AV

= +20dB 14.5 21 28

PGAIN_

= +14dB 20

PGAIN_

= +3dB 20

PGAIN_

= 0dB 7.5 10 14

PGAIN_

= -3dB 20

PGAIN_

= -6dB 20

PGAIN_

INAEXT/INBEXT = 1

AVL/AVR = 0xF to 0x0 (Note 5) -12 +3 dB

AVLG/AVRG = 00 to 11 (Note 5) 0 18 dB

Ripple limit cutoff 0.441 x fs

-3dB cutoff 0.449 x fs

PLP

0.47 x fSHz

f > f

SLP

= J, C

DACATTN

= 0dB, MCLK

V

REF

P-P

dB

kI

Hz

= =

�� Maxim Integrated Products 9

Low-Power, Stereo Audio Codec

with FlexSound Technology

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

AVDD

SPK_P and SPK_N. Receiver load (R to HPGND. Line out loads (R

2.2FF, C 0dB, AV

MICBIAS

DACGAIN

= 12.288MHz, LRCLK = 48kHz, MAS = 0. T

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

VOICE MODE IIR HIGHPASS FILTER (MODE1 = 0)

Passband Cutoff (-3dB from Peak)

Stopband Cutoff (-30dB from Peak)

DC Attenuation DC

STEREO AUDIO MODE FIR LOWPASS FILTER (MODE1 = 1, DHF1 = 0, LRCLK < 50kHz)

Passband Cutoff f

Passband Ripple f < f

Stopband Cutoff f

Stopband Attenuation (Note 6)

ADC STEREO AUDIO MODE FIR LOWPASS FILTER (MODE1 = 1, DHF1 = 1, LRCLK > 50kHz)

Passband Cutoff f

Passband Ripple f < f Stopband Cutoff f Stopband Attenuation f < f

PVDD

= V

DVDD

= C

REG

= 0dB, AV

= V

DVDDS1

LOUT

= 1FF, C

ADCLVL

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

) connected from LOUTL or LOUTR to SPKLGND. R

C1N-C1P

= 0dB, AV

DVDDS2

= 1FF, C

ADCGAIN

= T

A

MIN

= 1.8V, V

HPVDD

= 0dB, AV

to T

MAX

SPKLVDD

= C

HPVSS

= V

= 1FF. AV

PGAIN_

SPKRVDD

= 0dB, AV

= 3.7V. Speaker loads (Z

= RHP = J, R

LOAD

MICPRE_

= +20dB, AV = 0dB, AV

HP_

, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)

AVFLT = 0x1 (Elliptical tuned for fS = 16kHz + 217Hz notch)

AVFLT = 0x2 (500Hz Butterworth tuned for f

=

S

16kHz)

f

AHPPB

AVFLT = 0x3 (Elliptical tuned for fS = 8kHz + 217Hz notch)

AVFLT = 0x4 (500Hz Butterworth tuned for fS = 8kHz)

AVFLT = 0x5 (fS/240 Butterworth)

AVFLT = 0x1 (Elliptical tuned for fS = 16kHz + 217Hz notch)

AVFLT = 0x2 (500Hz Butterworth tuned for f

=

S

16kHz)

f

AHPSB

AVFLT = 0x3 (Elliptical tuned for fS = 8kHz + 217Hz notch)

AVFLT = 0x4 (500Hz Butterworth tuned for fS = 8kHz)

AVFLT = 0x5 (fS/240 Butterworth)

ATTEN

AVFLT ≠ 000

Ripple limit cutoff 0.43 x f

PLP

-6.02dB cutoff 0.5 x f

PLP

SLP

f < f

SLP

PLP

SLP

Ripple limit cutoff 0.208 x f

-3dB cutoff 0.28 x f

PLP

SLP

MAX98089

) connected between

SPK

= J, Z

REC

MICPGA_

REC

= 0dB, AV

0.0139 x f

S

0.0156 x f

S

0.0279 x f

S

0.0312 x f

S

0.0018 x f

S

90 dB

S

-0.1 +0.1 dB

60 dB

S

-0.1 +0.1 dB

60 dB

= J, C

SPK

DACATTN

= 0dB, MCLK

SPK_

0.0161 x f

S

0.0319 x f

S

0.0321 x f

S

0.0632 x f

S

0.0043 x f

S

0.58 x fSHz

0.417 x fSHz

REF

Hz

Hz-3dB cutoff 0.48 x f

Hz

= =

�� Maxim Integrated Products 10

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

AVDD

SPK_P and SPK_N. Receiver load (R to HPGND. Line out loads (R

2.2FF, C 0dB, AV

MICBIAS

DACGAIN

= 12.288MHz, LRCLK = 48kHz, MAS = 0. T

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

STEREO AUDIO MODE DC BLOCKING HIGHPASS FILTER (MODE1 = 1)

Passband Cutoff (-3dB from Peak)

DC Attenuation DC

MICROPHONE AUTOMATIC GAIN CONTROL

AGC Hold Duration

AGC Attack Time

AGC Release Time

AGC Threshold Level AGCTH = 0x0 to 0xF -3 +18 dB AGC Threshold Step Size 1 dB AGC Gain (Note 5) 0 20 dB

ADC NOISE GATE

NG Threshold Level ANTH = 0x3 to 0xF, referred to 0dBFS -64 -16 dB NG Attenuation (Note 5) 0 12 dB

ADC-TO-DAC DIGITAL SIDETONE (MODE = 0)

Sidetone Gain Adjust Range AV

Sidetone Gain Adjust Step Size

Sidetone Path Phase Delay

ADC-TO-DAC DIGITAL LOOP-THROUGH PATH

Dynamic Range (Note 4) DR

Total Harmonic Distortion + Noise

DAC LEVEL CONTROL

DAC Attenuation Range AV

DAC Attenuation Step Size 1 dB

DAC Gain Adjust Range AV

DAC Gain Adjust Step Size 6 dB

PVDD

= V

DVDD

= C

REG

= 0dB, AV

= V

DVDDS1

LOUT

= 1FF, C

ADCLVL

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

) connected from LOUTL or LOUTR to SPKLGND. R

C1N-C1P

= 0dB, AV

f

AHPPB

Atten

= 1.8V, V

DVDDS2

= 1FF, C

ADCGAIN

= T

A

MIN

AVFLT ≠ 000

HPVDD

= 0dB, AV

to T

SPKLVDD

= C

MAX

= V

SPKRVDD

= 1FF. AV

HPVSS

= 0dB, AV

PGAIN_

, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)

= 3.7V. Speaker loads (Z

= RHP = J, R

LOAD

MICPRE_

= +20dB, AV = 0dB, AV

HP_

REC

SPK

= J, Z

REC

MICPGA_

= 0dB, AV

) connected between

SPK

= 0dB, AV

SPK_

0.000125 x f

90 dB

AGCHLD = 01 50 AGCHLD = 11 400 AGCATK = 00 2 AGCATK = 11 123 AGCRLS = 000 0.078 AGCRLS = 111 10

STGA

DVST = 0x01 -0.5 DVST = 0x1F -60.5

2 dB

1kHz, 0dB input, highpass filter disabled

8kHz 2.2 16kHz 1.1

= 48kHz, MCLK = 12.288MHz, MODE = 1

f

THD+N

DACATTN

DACGAIN

S

(FIR audio), MIC to HP output, T

f = 1kHz, f

= 48kHz, MCLK = 12.288MHz, MODE =

S

= +25NC

A

1 (FIR audio), MIC to HP output

DV_ = 0xF to 0x0 (Note 5) -15 0 dB

DV1G = 00 to 11 (Note 5) 0 18 dB

83 93 dB

81 dB

= J, C

DACATTN

= 0dB, MCLK

S

REF

Hz

ms

s

dB

ms

= =

�� Maxim Integrated Products 11

Low-Power, Stereo Audio Codec

with FlexSound Technology

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

AVDD

SPK_P and SPK_N. Receiver load (R to HPGND. Line out loads (R

2.2FF, C 0dB, AV

MICBIAS

DACGAIN

= 12.288MHz, LRCLK = 48kHz, MAS = 0. T

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DAC DIGITAL FILTERS VOICE MODE IIR LOWPASS FILTER (MODE1 = 0)

Passband Cutoff f

Passband Ripple f < f Stopband Cutoff f

Stopband Attenuation (Note 6)

VOICE MODE IIR HIGHPASS FILTER (MODE1 = 0)

Passband Cutoff (-3dB from Peak)

Stopband Cutoff (-30dB from Peak)

DC Attenuation DC

STEREO AUDIO MODE FIR LOWPASS FILTER (MODE1 = 1, DHF1/DHF2 = 0, LRCLK < 50kHz)

Passband Cutoff f

Passband Ripple f < f Stopband Cutoff f

Stopband Attenuation (Note 6)

PVDD

= V

DVDD

= C

REG

= 0dB, AV

= V

DVDDS1

LOUT

= 1FF, C

ADCLVL

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

) connected from LOUTL or LOUTR to SPKLGND. R

C1N-C1P

= 0dB, AV

DVDDS2

= 1FF, C

ADCGAIN

= T

A

MIN

= 1.8V, V

HPVDD

= 0dB, AV

to T

MAX

SPKLVDD

= C

HPVSS

= V

= 1FF. AV

PGAIN_

SPKRVDD

= 0dB, AV

= 3.7V. Speaker loads (Z

= RHP = J, R

LOAD

MICPRE_

= +20dB, AV = 0dB, AV

HP_

, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)

PLP

SLP

Ripple limit cutoff 0.448 x f

-3dB cutoff 0.451 x f

PLP

f > f

SLP

DVFLT = 0x1 (Elliptical tuned for fS = 16kHz + 217Hz notch)

DVFLT = 0x2 (500Hz Butterworth tuned for f

=

S

16kHz)

f

DHPPB

DVFLT = 0x3 (Elliptical tuned for fS = 8kHz + 217Hz notch)

DVFLT = 0x4 (500Hz Butterworth tuned for fS = 8kHz)

DVFLT = 0x5 (fs/240 Butterworth)

DVFLT = 0x1 (Elliptical tuned for fS = 16kHz + 217Hz notch)

DVFLT = 0x2 (500Hz Butterworth tuned for f

=

S

16kHz)

f

DHPSB

DVFLT = 0x3 (Elliptical tuned for fS = 8kHz + 217Hz notch)

DVFLT = 0x4 (500Hz Butterworth tuned for fS = 8kHz)

DVFLT = 0x5 (fS/240 Butterworth) 0.0021 x f

ATTEN

DVFLT ≠ 000

Ripple limit cutoff 0.43 x f

PLP

-6.02dB cutoff 0.5 x f

PLP

SLP

f > f

SLP

MAX98089

) connected between

SPK

= J, Z

REC

MICPGA_

REC

= 0dB, AV

S

-0.1 +0.1 dB

75 dB

0.0139 x f

0.0156 x f

0.0279 x f

0.0312 x f

S

85 dB

S

-0.1 +0.1 dB

60 dB

= J, C

SPK

= 0dB, MCLK

SPK_

0.476 x f

0.0161 x f

0.0312 x f

0.0321 x f

0.0625 x f

0.0042 x f

0.58 x f

DACATTN

S

REF

Hz

Hz-3dB cutoff 0.47 x f

Hz

= =

�� Maxim Integrated Products 12

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

AVDD

SPK_P and SPK_N. Receiver load (R to HPGND. Line out loads (R

2.2FF, C 0dB, AV

MICBIAS

DACGAIN

= 12.288MHz, LRCLK = 48kHz, MAS = 0. T

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

STEREO AUDIO MODE FIR LOWPASS FILTER (MODE1 = 1, DHF1/DHF2 = 1 for LRCLK > 50kHz)

Passband Cutoff f

Passband Ripple f < f Stopband Cutoff f

Stopband Attenuation (Note 6)

STEREO AUDIO MODE DC BLOCKING HIGHPASS FILTER

Passband Cutoff (-3dB from Peak)

DC Attenuation DC

AUTOMATIC LEVEL CONTROL

Dual Band Lowpass Corner Frequency

Dual Band Highpass Corner Frequency

Gain Range 0 12 dB

Low-Signal Threshold ALCTH = 111 to 001 -48 -12 dBFS

Release Time

PARAMETRIC EQUALIZER

Number of Bands 5 Bands

Per Band Gain Range -12 +12 dB

Preattenuator Gain Range (Note 5) -15 0 dB

Preattenuator Step Size 1 dB

DAC TO RECEIVER AMPLIFIER PATH

Dynamic Range DR f

Total Harmonic Distortion + Noise

Power-Supply Rejection Ratio PSRR

Click-and-Pop Level K

PVDD

= V

DVDD

= C

REG

= 0dB, AV

= V

DVDDS1

LOUT

= 1FF, C

ADCLVL

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

) connected from LOUTL or LOUTR to SPKLGND. R

C1N-C1P

= 0dB, AV

PLP

SLP

f

DHPPB

ATTEN

DVDDS2

= 1FF, C

ADCGAIN

= T

A

MIN

= 1.8V, V

HPVDD

= 0dB, AV

to T

MAX

SPKLVDD

= C

HPVSS

PGAIN_

= V

SPKRVDD

= 1FF. AV

= 0dB, AV

= 3.7V. Speaker loads (Z

= RHP = J, R

LOAD

MICPRE_

= +20dB, AV = 0dB, AV

HP_

REC

, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)

Ripple limit cutoff 0.24 x f

-3dB cutoff 0.31 x f

PLP

f < f

SLP

DVFLT ≠ 000 (DAI1), DCB2 = 1 (DAI2)

) connected between

SPK

= J, Z

REC

MICPGA_

= 0dB, AV

S

SPK

= 0dB, AV

SPK_

-0.1 +0.1 dB

0.477 x fSHz

60 dB

0.000104 x f

90 dB

ALCMB = 1 5 kHz

ALCRLS = 101 0.25

ALCRLS = 000 8

= 48kHz, f = 1kHz (Note 4) 96 dB

S

THD+N

CP

f = 1kHz, P

V

SPKLVDD

f = 217Hz, V

f = 1kHz, V

f = 10kHz, V

= 15mW, R

OUT

REC

= 2.8V to 5.5V, TA = +25NC

= 200mV

RIPPLE

= 200mV

RIPPLE

= 200mV

P-P

Peak voltage, A-weighted, 32 samples per second, AV

REC

0dB

= 32I

64 75

P-P

Into shutdown -68

=

Out of shutdown -72

-70 -63 dB

80

77

= J, C

REF

DACATTN

= 0dB, MCLK

Hz

S

Hz

s

dB

dBV

= =

�� Maxim Integrated Products 13

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

AVDD

SPK_P and SPK_N. Receiver load (R to HPGND. Line out loads (R

2.2FF, C 0dB, AV

MICBIAS

DACGAIN

= 12.288MHz, LRCLK = 48kHz, MAS = 0. T

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

LINE INPUT TO RECEIVER AMPLIFIER PATH

Dynamic Range (Note 4) DR Referenced to full-scale output level 94 dB Total Harmonic Distortion +

Noise

Click-and-Pop Level K

RECEIVER AMPLIFIER

Output Power P Full-Scale Output (Note 7) 1 V

Volume Control (Note 5) AV

Volume Control Step Size

Mute Attenuation f = 1kHz 88 dB

Capacitive Drive Capability No sustained oscillations

DAC TO LINE OUT AMPLIFIER PATH

Dynamic Range (Note 4) DR f

Total Harmonic Distortion + Noise

LINE INPUT TO LINE OUT AMPLIFIER PATH

Dynamic Range (Note 4) DR Referenced to full-scale output level 92 dB

Total Harmonic Distortion + Noise

Full-Scale Output (Note 7) 2 V Mute Attenuation f = 1kHz 85 dB Output Offset Voltage V Capacitive Drive Capability

PVDD

= V

DVDD

= C

REG

= 0dB, AV

= V

DVDDS1

LOUT

= 1FF, C

ADCLVL

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

) connected from LOUTL or LOUTR to SPKLGND. R

C1N-C1P

= 0dB, AV

DVDDS2

= 1FF, C

ADCGAIN

= T

A

MIN

= 1.8V, V

HPVDD

= 0dB, AV

to T

MAX

SPKLVDD

= C

HPVSS

= V

= 1FF. AV

PGAIN_

SPKRVDD

= 0dB, AV

= 3.7V. Speaker loads (Z

= RHP = J, R

LOAD

MICPRE_

= +20dB, AV = 0dB, AV

HP_

REC

SPK

= J, Z

REC

MICPGA_

= 0dB, AV

) connected between

= J, C

SPK

= 0dB, AV

DACATTN

= 0dB, MCLK

SPK_

, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)

THD+N -64 dB

CP

OUT

REC

Peak voltage, A-weighted, 32 samples per second, AV

REC

0dB

R

= 32I, f = 1kHz, THD = 1%

REC

RECVOL = 0x00 -62 RECVOL = 0x1F 8

Into shutdown -51

=

Out of shutdown -49

dBV

92 mW

+8dB to +6dB 0.5 +6dB to +0dB 1 0dB to -14dB 2

-14dB to -38dB 3

-38dB to -62dB 4

500 100

-78 -72 dB

76 dB

0.5 Q4

Q

500 pF

THD+N

OS

= 32I

R

REC

R

= J

REC

= 48kHz, f = 1kHz 83 96 dB

S

f = 1kHz, R

AV

REC_

No sustained oscillations, R

= 1kI

L

= 10kI

L

= -62dB

= 1kI

L

REF

RMS

dB

pF

P-P

mV

= =

�� Maxim Integrated Products 14

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

AVDD

SPK_P and SPK_N. Receiver load (R to HPGND. Line out loads (R

2.2FF, C 0dB, AV

MICBIAS

DACGAIN

= 12.288MHz, LRCLK = 48kHz, MAS = 0. T

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DAC TO SPEAKER AMPLIFIER PATH

Total Harmonic Distortion + Noise

Crosstalk

Output Noise 53

Click-and-Pop Level K

MIC INPUT TO SPEAKER AMPLIFIER PATH

Dynamic Range (Note 4) DR Referenced to full-scale output level, AV

Total Harmonic Distortion + Noise

Click-and-Pop Level K

SPEAKER AMPLIFIER

Output Power P

Full-Scale Output (Note 7) 2 V

Volume Control AV

PVDD

= V

DVDD

= C

REG

= 0dB, AV

= V

DVDDS1

LOUT

= 1FF, C

ADCLVL

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

) connected from LOUTL or LOUTR to SPKLGND. R

C1N-C1P

= 0dB, AV

THD+N

CP

THD+N

CP

OUT

SPK_

DVDDS2

= 1FF, C

ADCGAIN

= T

A

MIN

f = 1kHz, P

= 1.8V, V

HPVDD

= 0dB, AV

to T

MAX

OUT

SPKLVDD

= C

= 200mW, Z

= V

= 1FF. AV

HPVSS

PGAIN_

, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)

SPKL to SPKR and SPKR to SPKL,

= 640mW, f = 1kHz

P

OUT

Peak voltage, A-weighted, 32 samples per second, AV

= 0dB

SPK_

f = 1kHz, P

= 200mW, RL = 8I + 68FH

OUT

Peak voltage, A-weighted, 32 samples per second, AV

SPK_

0dB

V

f = 1kHz, THD = 10%, Z

= 4I +

SPK

33FH

f = 1kHz, THD = 1%,

= 4I +

Z

SPK

33F

H

f = 1kHz, THD = 10%,

= 8I +

Z

SPK

68FH

f = 1kHz, THD = 1%,

= 8I +

Z

SPK

68FH

(Note 5)

SPKLVDD

V

SPKLVDD

V

SPKLVDD

V

SPKLVDD

V

SPKLVDD

V

SPKLVDD

V

SPKLVDD

V

SPKLVDD

V

SPKLVDD

V

SPKLVDD

V

SPKLVDD

V

SPKLVDD

V

SPKLVDD

V

SPKLVDD

V

SPKLVDD

V

SPKLVDD

SPVOLL/SPVOLR = 0x00 -62 SPVOLL/SPVOLR = 0x1F +8

SPKRVDD

= 0dB, AV

SPK

= 3.7V. Speaker loads (Z

= RHP = J, R

LOAD

MICPRE_

= +20dB, AV = 0dB, AV

HP_

= 8I + 68FH

Into shutdown 65

Out of shutdown 66

= 0dB 82 dB

SPK_

Into shutdown 55

=

Out of shutdown 52

= V = V = V = V = V = V = V = V = V = V = V = V = V = V = V = V

SPKRVDD

= 5.0V 2950 = 4.2V 2060 = 3.7V 1570 = 3.0V 1000 = 5.0V 2320 = 4.2V 1620 = 3.7V 1240 = 3.0V 785 = 5.0V 1730 = 4.2V 1210 = 3.7V 930 = 3.0V 600 = 5.0V 1365 = 4.2V 955 = 3.7V 735 = 3.0V 475

MICPGA_

= 0dB, AV

REC

) connected between

SPK

= J, Z

REC

SPK

= 0dB, AV

SPK_

-68 dB

-88 dB

71 dB

= J, C

DACATTN

= 0dB, MCLK

FV

REF

RMS

dBV

mW

RMS

dB

= =

�� Maxim Integrated Products 15

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

AVDD

SPK_P and SPK_N. Receiver load (R to HPGND. Line out loads (R

2.2FF, C 0dB, AV

MICBIAS

DACGAIN

= 12.288MHz, LRCLK = 48kHz, MAS = 0. T

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Volume Control Step Size

Mute Attenuation f = 1kHz 86 dB Output Offset Voltage V

EXCURSION LIMITER

Upper Corner Frequency Range

Lower Corner Frequency DHPLCF = 01 to 10 400 Hz

Biquad Minimum Corner Frequency

Threshold Voltage

Release Time

POWER LIMITER

Attenuation -64 dB

Threshold

Time Constant 1 t

Time Constant 2 t

Weighting Factor

DISTORTION LIMITER

Distortion Limit

Release Time Constant

PVDD

= V

DVDD

= C

REG

= 0dB, AV

= V

DVDDS1

LOUT

= 1FF, C

ADCLVL

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

) connected from LOUTL or LOUTR to SPKLGND. R

C1N-C1P

= 0dB, AV

DVDDS2

= 1FF, C

ADCGAIN

= T

A

MIN

= 1.8V, V

HPVDD

= 0dB, AV

to T

MAX

SPKLVDD

= C

HPVSS

= V

= 1FF. AV

PGAIN_

SPKRVDD

= 0dB, AV

= 3.7V. Speaker loads (Z

= RHP = J, R

LOAD

MICPRE_

= +20dB, AV = 0dB, AV

HP_

REC

SPK

= J, Z

REC

MICPGA_

= 0dB, AV

) connected between

SPK

= 0dB, AV

SPK_

, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)

+8dB to +6dB 0.5 +6dB to +0dB 1 0dB to -14dB 2

-14dB to -38dB 3

-38dB to -64dB 4

AV

OS

= -61dB, TA = +25NC Q0.5 Q3

SPK_

DHPUCF = 001 to 100 400 1000 Hz

DHPUCF = 000 (fixed mode) 100 DHPUCF = 001 200 DHPUCF = 010 300 DHPUCF = 011 400 DHPUCF = 100 500

Z

= 8I + 68FH, V

SPK

KLVDD

AV

SPK_

= V

= 8dB

SPKRVDD

SP-

= 5.5V,

DHPTH = 000 0.34

DHPTH = 111 0.95

ALCRLS = 101 0.25 ALCRLS = 000 4

= 8I + 68FH, V

Z

PWR1

PWR2

k

PWR

SPK

= V

SPK_

SPKRVDD

= 8dB

KLVDD

AV

PWRT1 = 0x1 0.5 PWRT1 = 0xF 8.7 PWRT2 = 0x1 to 0xF 0.5 PWRT2 = 0xF 8.7 PWRK = 000 to 111 12.5 100 %

SP-

= 5.5V,

PWRTH = 0x1 0.08

PWRTH = 0xF 1.23

THDCLP = 0x1 < 1

THDCLP = 0xF 24

THDT1 = 000 0.76

THDT1 = 111 6.2

= J, C

DACATTN

= 0dB, MCLK

REF

dB

mV

Hz

V

s

W

s

min

%

s

= =

P

�� Maxim Integrated Products 16

Low-Power, Stereo Audio Codec

with FlexSound Technology

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

AVDD

SPK_P and SPK_N. Receiver load (R to HPGND. Line out loads (R

2.2FF, C 0dB, AV

MICBIAS

DACGAIN

= 12.288MHz, LRCLK = 48kHz, MAS = 0. T

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DAC TO HEADPHONE AMPLIFIER PATH

Dynamic Range (Note 4) DR f

Total Harmonic Distortion + Noise

Crosstalk

Power-Supply Rejection Ratio PSRR

PVDD

= V

DVDD

= C

REG

= 0dB, AV

= V

DVDDS1

LOUT

= 1FF, C

ADCLVL

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

DVDDS2

= 1.8V, V

SPKLVDD

) connected from LOUTL or LOUTR to SPKLGND. R

C1N-C1P

= 1FF, C

= 0dB, AV

A

ADCGAIN

= T

MIN

= 48kHz

S

THD+N f = 1kHz, P

HPL to HPR and HPR to HPL, P f = 1kHz, R

V

AVDD

f = 217Hz, V AV

HP_

f = 1kHz, V AV

HP_

f = 10kHz, V AV

HP_

HPVDD

= 0dB, AV

to T

OUT

= V

PVDD

= 0dB

RIPPLE

= 0dB

= C

HPVSS

PGAIN_

, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)

MAX

= 20mW

= 32I

HP

= 1.65V to 2.0V 46 54

= 200mV

RIPPLE

= 200mV

RIPPLE

= V

SPKRVDD

= 1FF. AV

= 0dB, AV

= 3.7V. Speaker loads (Z

= RHP = J, R

LOAD

MICPRE_

= +20dB, AV = 0dB, AV

HP_

REC

Master or slave mode 101 Slave mode 97

Low power mode, T

= +25NC

A

= 16I

R

HP

= 32I

R

HP

= 5mW,

OUT

,

P-P

,

P-P

,

P-P

95 97

MAX98089

) connected between

SPK

= J, Z

REC

MICPGA_

= 0dB, AV

-84 -64

-85

-92 dB

72

63

43

= J, C

SPK

DACATTN

= 0dB, MCLK

SPK_

REF

dB

= =

MODE = 0 (voice) 8kHz 2.2

MODE = 0 (voice) 16kHz

MODE = 1 (music) 8kHz

MODE = 1 (music) 48kHz

1.1 ms

4.5

0.76

DAC Path Phase Delay

1kHz, 0dB input, highpass filter disabled measured from digital input to analog output

Gain Error 1 5 %

Channel Gain Mismatch 1 %

Peak voltage, A-weighted,

Click-and-Pop Level K

32 samples per second,

CP

AV

HP_

LINE INPUT TO HEADPHONE AMPLIFIER PATH

Total Harmonic Distortion + Noise

THD+N

= 1V

V

IN

= 0dB

, f =1kHz, RHP = 32I

P-P

Into shutdown -62

dBV

Out of shutdown -63

81 dB

Dynamic Range (Note 4) 92.5 dB

Click-and-Pop Level K

Peak voltage, A-weighted, 32 samples per second,

CP

AV

= 0dB

HP_

Into shutdown -62

dBV

Out of shutdown -63

�� Maxim Integrated Products 17

Low-Power, Stereo Audio Codec

with FlexSound Technology

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

AVDD

SPK_P and SPK_N. Receiver load (R to HPGND. Line out loads (R

2.2FF, C 0dB, AV

MICBIAS

DACGAIN

= 12.288MHz, LRCLK = 48kHz, MAS = 0. T

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

HEADPHONE AMPLIFIER

Output Power P

Positive Charge-Pump Output Voltage

Negative Charge-Pump Output Voltage

Output Voltage Threshold (Output Voltage at which the Charge Pump Switches Modes; VOUT Rising; Transition from Split to Invert Mode)

PVDD

= V

DVDD

= C

REG

= 0dB, AV

= V

DVDDS1

LOUT

= 1FF, C

ADCLVL

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

DVDDS2

= 1.8V, V

SPKLVDD

) connected from LOUTL or LOUTR to SPKLGND. R

C1N-C1P

= 0dB, AV

OUT

HPVDD

HPVSS

V

TH

= 1FF, C

ADCGAIN

= T

A

MIN

f = 1kHz, THD = 1%

≤ V

V

OUT

V

> V

OUT

V

≤ V

OUT

V

> V

OUT

RL = J

HPVDD

= 0dB, AV

to T

PVDD

= C

MAX

HPVSS

PGAIN_

, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)

x 0.2V, RHP = J x 0.2V, RHP = J x 0.2V, RHP = J x 0.2V, RHP = J

= V

SPKRVDD

= 1FF. AV

= 0dB, AV

= 3.7V. Speaker loads (Z

= RHP = J, R

LOAD

HP

HP_

= 32I = 16I

= +20dB, AV = 0dB, AV

REC

MICPRE_

R R

MAX98089

) connected between

SPK

= J, Z

REC

MICPGA_

= 0dB, AV

30 38

PVDD/2

PVDD

-PVDD/2

-PVDD

QPVDD

x 0.2

= 0dB, AV

= J, C

SPK

DACATTN

= 0dB, MCLK

SPK_

REF

mW

V

= =

Full-Scale Output (Note 7) 1 V

Volume Control AV

HP_

(Note 5)

HPVOL_ = 0x00 -67 HPVOL_ = 0x1F +3

RMS

dB

+3dB to +1dB 0.5 +1dB to -5dB 1

Volume Control Step Size

-5dB to -19dB 2

dB

-19dB to -43dB 3

-43dB to -67dB 4

Mute Attenuation f = 1kHz 100 dB

AV

Output Offset Voltage V

OS

= -67dB

HP_

Capacitive Drive Capability No sustained oscillations

T R R

A

HP

= T

MIN

= 32I = J

to T

MAX

Q3 500 100

mV

pF

= +25NC Q0.1 Q1

T

SPEAKER BYPASS SWITCH

I

= 100mA, SPKBYP = 1,

On-Resistance R

Total Harmonic Distortion + Noise

THD+N

Off-Isolation

Off-Leakage Current

ON

SPKL_

V

= [0V, V

RXIN_

= 2V

V

IN

Z

= 8I + 68FH, f = 1kHz,

SPK

, VCM = V

P-P

SPKLVDD

SPKBYP = 1

V

IN

Z

SPK

V

RXIN_

V

SPKL_

= 2V

, VCM = V

P-P

= 8I + 68FH, f = 1kHz

= [0V, V

= [V

SPKLVDD

]

SPKLVDD

],

, 0V]

/2,

R

S

R

S

= 10I

= 0I

2.8

60

96 dB

-20 +20

I

dB

FA

�� Maxim Integrated Products 18

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

AVDD

SPK_P and SPK_N. Receiver load (R to HPGND. Line out loads (R

2.2FF, C 0dB, AV

MICBIAS

DACGAIN

= 12.288MHz, LRCLK = 48kHz, MAS = 0. T

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

RECEIVER BYPASS SWITCH

On-Resistance R

Total Harmonic Distortion + Noise

Off-Isolation

Off-Leakage Current

JACK DETECTION

JACKSNS High Threshold V

JACKSNS Low Threshold V

JACKSNS Sense Voltage MICBIAS disabled, JDWK = 1 3.65 3.7 JACKSNS Sense Resistance R JACKSNS Weak Pullup Current I

JACKSNS Deglitch Period t

BATTERY ADC

Input Voltage Range 2.6 5.6 V LSB Size 0.1 V

PVDD

= V

DVDD

= C

REG

= 0dB, AV

= V

DVDDS1

LOUT

= 1FF, C

ADCLVL

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

) connected from LOUTL or LOUTR to SPKLGND. R

C1N-C1P

= 0dB, AV

ON

THD+N

TH1

TH2

SENSE

WPU

GLITCH

= 1.8V, V

DVDDS2

= 1FF, C

A

HPVDD

ADCGAIN

= T

MIN

I

= 100mA, RECBYP = 1, V

RECP

]

VDD

V

= 2V

IN

= C

= 0dB, AV

to T

MAX

, VCM = V

P-P

SPKLVDD

68FH, f = 1kHz, RECBYP = 1, R

V

IN

= 2V

, VCM = V

P-P

68FH, f = 1kHz

V

= [0V, V

RECP

[V

SPKLVDD

, 0V]

MICBIAS enabled

MICBIAS disabled

MICBIAS enabled

MICBIAS disabled

HPVSS

PGAIN_

= V

SPKRVDD

= 1FF. AV

= 0dB, AV

= 3.7V. Speaker loads (Z

= RHP = J, R

LOAD

MICPRE_

= +20dB, AV = 0dB, AV

HP_

REC

SPK

= J, Z

REC

MICPGA_

= 0dB, AV

) connected between

= 0dB, AV

SPK_

, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)

= [0V, V

SPKLVDD

], V

RECN

/2, Z

S

/2, Z

SPK

= 0I

SPK

=

= 8I +

SPKL-

2

60 %

84 dB

-15 +15

0.92 x

V

MICBIAS

0.92 x

V

SPKLVDD

0.06 x

V

MICBIAS

0.06 x

V

SPKLVDD

0.95 x

V

MICBIAS

0.95 x

V

SPKLVDD

0.10 x

V

MICBIAS

0.10 x

V

SPKLVDD

MICBIAS disabled, JDWK = 0 1.6 2.4 2.9 MICBIAS disabled, JDWK = 1 2 5 9.5 JDEB = 00 25 JDEB = 11 200

SPK

0.98 x

V

MICBIAS

0.98 x

V

SPKLVD

0.17 x

V

MICBIAS

0.17 x

V

SPKLVD

= J, C

DACATTN

= 0dB, MCLK

D

REF

I

FA

V

kI

FA

ms

= =

DIGITAL INPUT/OUTPUT CHARACTERISTICS

(V

= V

AVDD

(Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MCLK

Input High Voltage V Input Low Voltage V Input Leakage Current I Input Capacitance 10 pF

PVDD

= V

DVDD

= V

DVDDS1

IH

= V

IH

IL

, I

IL

DVDDS2

V

DVDD

= 1.8V, V

SPKLVDD

= V

SPKRVDD

= 2.0V, VIN = 0V, 5.5V; TA = +25°C

= 3.7V, TA = +25NC, unless otherwise noted.)

1.2 V

0.6 V

-1 +1

�� Maxim Integrated Products 19

FA

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

DIGITAL INPUT/OUTPUT CHARACTERISTICS (continued)

(V

= V

AVDD

(Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SDINS1, BCLKS1, LRCLKS1—INPUT

Input High Voltage V

Input Low Voltage V

Input Hysteresis 200 mV Input Leakage Current I Input Capacitance 10 pF

BCLKS1, LRCLKS1, SDOUTS1—OUTPUT

Output Low Voltage V

Output High Voltage V

Input Leakage Current I

SDINS2, BCLKS2, LRCLKS2—INPUT

Input High Voltage V

Input Low Voltage V

Input Hysteresis 200 mV Input Leakage Current I Input Capacitance 10 pF

BCLKS2, LRCLKS2, SDOUTS2—OUTPUT

Output Low Voltage V

Output High Voltage V

Input Leakage Current I

SDA, SCL—INPUT

Input High Voltage V

Input Low Voltage V

Input Hysteresis 210 mV Input Leakage Current I Input Capacitance 10 pF

SDA, IRQ—OUTPUT

Output High Current I

Output Low Voltage V

PVDD

= V

DVDD

= V

DVDDS1

IH

, I

OL

OH

, I

IH

, I

OL

OH

, I

IH

, I

OH

OL

= V

DVDDS2

IL

V

DVDDS1

V

DVDDS1

V

DVDDS1

V

DVDD

IL

high-impedance state

IL

V

DVDDS2

V

DVDDS2

V

DVDDS2

V

DVDD

IL

high-impedance state

IL

V

IL

DVDD

V

OUT

V

DVDD

= 1.8V, V

SPKLVDD

= V

SPKRVDD

= 3.7V, TA = +25NC, unless otherwise noted.)

0.7 x

DVDDS1

0.29 x

DVDDS1

= 3.6V, VIN = 0V, 3.6V; TA = +25°C

-1 +1

= 1.65V, IOL = 3mA 0.4 V

= 1.65V, IOH = 3mA

= 2.0V, VIN = 0V, 5.5V; TA = +25°C,

DVDDS1

- 0.4

-1 +1

0.7 x

DVDDS2

0.29 x

DVDDS2

= 3.6V, VIN = 0V, 3.6V; TA = +25°C

-1 +1

= 1.65V, IOL = 3mA 0.4 V

= 1.65V, IOH = 3mA

= 2.0V, VIN = 0V, 5.5V; TA = +25NC,

DVDDS2

- 0.4

-1 +1

0.7 x

DVDD

0.3 x

DVDD

= 2.0V, VIN = 0V, 5.5V; TA = +25NC

= 5.5V, TA = +25°C

= 1.65V, IOL = 3mA

-1 +1

1 mA

0.2 x

DVDD

V

FA

V

FA

V

FA

V

FA

V

FA

V

�� Maxim Integrated Products 20

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

DIGITAL INPUT/OUTPUT CHARACTERISTICS (continued)

(V

= V

AVDD

(Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DIGMICDATA—INPUT

Input High Voltage V

Input Low Voltage V

Input Hysteresis 125 mV Input Leakage Current I Input Capacitance 10 pF

DIGMICCLK—OUTPUT

Output Low Voltage V

Output High Voltage V

PVDD

= V

DVDD

= V

DVDDS1

IH

IL

, I

OL

OH

= V

IL

DVDDS2

V

DVDD

V

DVDD

V

DVDD

= 1.8V, V

= 2.0V, VIN = 0V, 2.0V; TA = +25°C

= 1.65V, IOL = 1mA 0.4 V

= 1.65V, IOH = 1mA

SPKLVDD

= V

SPKRVDD

= 3.7V, TA = +25NC, unless otherwise noted.)

0.65 x DVDD

0.35 x DVDD

-25 +25

DVDD -

0.4

V

FA

V

INPUT CLOCK CHARACTERISTICS

(V

= V

AVDD

(Note 1)

MCLK Input Frequency f

MCLK Input Duty Cycle

Maximum MCLK Input Jitter 100 ps

LRCLK Sample Rate (Note 8)

DAI1 LRCLK Average Frequency Error (Note 9)

DAI2 LRCLK Average Frequency Error (Note 9)

PLL Lock Time

Maximum LRCLK Jitter to Maintain PLL Lock

Soft-Start/Stop Time 10 ms

= V

PVDD

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DVDD

= V

DVDDS1

= V

MCLK

= 1.8V, V

DVDDS2

PSCLK = 01 40 50 60 PSCLK = 10 or 11 30 70

DHF_ = 0 8 48 DHF_ = 1 48 96 FREQ1 = 0x8 to 0xF 0 0 FREQ1 = 0x0 -0.025 +0.025

Rapid lock mode 2 7 Nonrapid lock mode 12 25

SPKLVDD

= V

SPKRVDD

= 3.7V, TA = +25NC, unless otherwise noted.)

10 60 MHz

-0.025 +0.025 %

100 ns

%

RMS

kHz

%

ms

�� Maxim Integrated Products 21

Low-Power, Stereo Audio Codec

with FlexSound Technology

AUDIO INTERFACE TIMING CHARACTERISTICS

(V

= V

AVDD

(Note 1)

BCLK Cycle Time t BCLK High Time t BCLK Low Time t BCLK or LRCLK Rise and Fall Time t SDIN to BCLK Setup Time t LRCLK to BCLK Setup Time t SDIN to BCLK Hold Time t LRCLK to BCLK Hold Time t

Minimum Delay Time from LSB BCLK Falling Edge to High-Impedance State

LRCLK Rising Edge to SDOUT MSB Delay

BCLK to SDOUT Delay t

Delay Time from BCLK to LRCLK t

Delay Time from LRCLK to BCLK After LSB

PVDD

= V

DVDD

= V

DVDDS1

= V

DVDDS2

= 1.8V, V

SPKLVDD

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

BCLK

BCLKH

BCLKL

, t

R

SETUP

SYNCSET

HOLD

SYNCHOLD

t

HIZOUT

t

SYNCTX

CLKTX

CLKSYNC

t

ENDSYNC

Slave mode 90 ns Slave mode 20 ns Slave mode 20 ns Master mode, CL = 15pF 5 ns

F

Slave mode 20 ns

Master mode, TDM_ = 1 42 ns

CL = 30pF, TDM_ = 1, FSW_ = 1 50 ns

CL = 30pF

Master mode

TDM_ = 1, BCLK rising edge 50 TDM_ = 0 50 TDM_ = 1 -15 +15

TDM_ = 0

TDM_ = 1, FSW_ = 1 20 ns

= V

SPKRVDD

MAX98089

= 3.7V, TA = +25NC, unless otherwise noted.)

20 ns

ns

0.8 x

t

BCLKL

ns

t

HIZOUT

CLKSYNC

F

t

CLKTX

HI-Z MSB

MASTER MODE

t

SETUPtHOLD

MSBLSB

BCLK

(OUTPUT)

LRCLK

(OUTPUT)

SDOUT

(OUTPUT)

SDIN

(INPUT)

t

R

LSB

Figure 1. Non-TDM Audio Interface Timing Diagrams (TDM_ = 0)

�� Maxim Integrated Products 22

BCLK

(INPUT)

LRCLK

(INPUT)

SDOUT

(OUTPUT)

SDIN

(INPUT)

t

SYNCSET

t

HIZOUT

LSB HI-Z

LSB

SLAVE MODE

t

BCLKH

t

CLKTX

t

BCLK

t

SETUPtHOLD

MSB

t

MSB

BCLKL

Low-Power, Stereo Audio Codec

with FlexSound Technology

t

F

BCLK (OUTPUT)

t

CLKSYNC

LRCLK (OUTPUT)

t

SDOUT (OUTPUT)

SDIN (INPUT)

HIZOUT

LSB

CLKTX

HI-ZLSB

MASTER MODE SLAVE MODE

Figure 2. TDM Audio Interface Timing Diagram (TDM_ = 1, FSW_ = 0)

t

R

t

CLKSYNC

MSB

t

SETUP

t

HOLD

SDOUT (OUTPUT)

BCLK (INPUT)

LRCLK (INPUT)

SDIN (INPUT)

t

SYNCSET

t

HIZOUT

LSB

t

CLKTX

HI-ZLSB

MAX98089

t

BCLK

t

BCLKH

t

SYNCHOLD

MSB

t

SETUP

t

BCLKL

t

HOLD

BCLK (OUTPUT)

LRCLK (OUTPUT)

SDOUT (OUTPUT)

SDIN (INPUT)

t

F

t

ENDSY NC

t

HIZOUT

LSB M SB

t

SYNCTX

HI-ZLSB MSB

MASTER MODE

t

R

t

CLKSYNC

t

CLKTX

t

SETUP

t

HOLD

BCLK (INPUT)

LRCLK (INPUT)

SDOUT (OUTPUT)

SDIN (INPUT)

Figure 3. TDM Audio Interface Timing Diagram (TDM_ = 1, FSW_ = 1)

DIGITAL MICROPHONE TIMING CHARACTERSTICS

(V

= V

AVDD

(Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DIGMICCLK Frequency f

DIGMICDATA to DIGMICCLK Setup Time

DIGMICDATA to DIGMICCLK Hold Time

HPVDD

= V

DVDD

= V

DVDDS1

t

= V

MICCLK

SU,MIC

HD,MIC

DVDDS2

= 1.8V, V

SPKLVDD

= V

MICCLK = 00 PCLK/8 MICCLK = 01 PCLK/6

MICCLK = 10

Either clock edge 20 ns

Either clock edge 0 ns

t

HIZOUT

SPKRVDD

t

BCLK

LSB

t

SYNCTX

HI-ZLSB

SLAVE MODE

t

BCLKH

MSB

t

CLKTX

MSB

t

SETUP

t

BCLKL

t

HOLD

= 3.7V, TA = +25NC, unless otherwise noted.)

64 x

f

LRCLK

MHz

�� Maxim Integrated Products 23

LEFT RIGHT LEFT RIGHT

Figure 4. Digital Microphone Timing Diagram

I2C TIMING CHARACTERISTICS

(V

= V

AVDD

(Note 1)

Serial-Clock Frequency f

Bus Free Time Between STOP and START Conditions

Hold Time (Repeated) START Condition

SCL Pulse-Width Low t SCL Pulse-Width High t

Setup Time for a Repeated START Condition

Data Hold Time t Data Setup Time t

SDA and SCL Receiving Rise Time t

SDA and SCL Receiving Fall Time t

SDA Transmitting Fall Time t

Setup Time for STOP Condition t Bus Capacitance C Pulse Width of Suppressed Spike t

PVDD

= V

DVDD

= V

DVDDS1

= V

DVDDS2

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SCL

t

BUF

t

HD,STA

LOW

HIGH

t

SU,STA

HD,DAT

SU,DAT

R

F

SU,STO

B

SP

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

1/f

MICCLK

t

HD,MICtSU,MIC

t

HD,MICtSU,MIC

= 1.8V, V

SPKLVDD

Guaranteed by SCL pulse-width low and high

RPU = 475I, CB = 100pF, 400pF

(Note 10)

RPU = 475I, CB = 100pF, 400pF (Note 10)

Guaranteed by SDA transmitting fall time 400 pF

= V

SPKRVDD

= 3.7V, TA = +25NC, unless otherwise noted.)

0 400 kHz

1.3

0.6

1.3

0.6

Fs

Fs Fs

Fs

0 900 ns

100 ns

20 +

0.1C

20 +

0.1C

20 +

0.05C

0.6

B

300 ns

250 ns

Fs

0 50 ns

�� Maxim Integrated Products 24

Low-Power, Stereo Audio Codec

with FlexSound Technology

I2C TIMING CHARACTERISTICS (continued)

(V

AVDD

(Note 1)

= V

SDA

PVDD

= V

DVDD

= V

t

LOW

DVDDS1

t

SU,DAT

= V

DVDDS2

t

HD,DAT

= 1.8V, V

SPKLVDD

t

SU,STA

= V

SPKRVDD

t

HD,STA

MAX98089

= 3.7V, TA = +25NC, unless otherwise noted.)

t

BUF

t

SP

t

SU,STO

t

HIGH

t

R

F

REPEATED START CONDITION

STOP

CONDITION

START

CONDITION

Figure 5. I

SCL

t

HD,STA

START CONDITION

2

C Interface Timing Diagram

Note 1: The IC is 100% production tested at TA = +25NC. Specifications over temperature limits are guaranteed by design. Note 2:

Analog supply current = I

+ I

DVDDS1

+ I

DVDDS2

.

AVDD

+ I

. Speaker supply current = I

HPVDD

SPKLVDD

+ I

SPKRVDD

. Digital supply current = I

DVDD

Note 3: Clocking all zeros into the DAC. Note 4: Dynamic range measured using the EIAJ method. -60dBFS, 1kHz output signal, A-weighted and normalized to 0dBFS.

f = 20Hz to 20kHz.

Note 5: Gain measured relative to the 0dB setting. Note 6: The filter specification is accurate only for synchronous clocking modes, where NI is a multiple of 0x1000. Note 7: 0dBFS for DAC input. 1V

for INA/INB inputs.

P-P

Note 8: LRCLK may be any rate in the indicated range. Asynchronous or noninteger MCLK/LRCLK ratios may exhibit some full-

scale performance degradation compared to synchronous integer related MCLK/LRCLK ratios.

Note 9: In master-mode operation, the accuracy of the MCLK input proportionally determines the accuracy of the sample clock rate. Note 10: CB is in pF.

Power Consumption

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

= V

DVDDS2

= 1.8V, V

SPKLVDD

= V

SPKRVDD

= 3.7V, MAS = 0.)

MODE

Playback to Headphone Only

DAC Playback 48kHz Stereo HP

DAC ª HP Low power mode, 24-bit, music filters, 256Fs

DAC Playback 48kHz Stereo HP

DAC ª HP Low power mode, 24-bit, music filters, 256Fs, 0.1mW/channel, R

= 32I

HP

�� Maxim Integrated Products 25

I

AVDD

(mA)

I

PVDD

(mA)

I

SPKVDD

I

SPKLVDD

(mA)

+

I

DVDD

(mA)

I

DVDDS1

I

DVDDS2

(mA)

+

POWER

(mW)

DYNAMIC

RANGE (dB)

1.25 0.47 0.00 1.35 0.01 5.55 97

1.25 1.81 0.00 1.56 0.01 8.32 97

(V

= V

AVDD

DAC Playback to Headphone

DAC Playback 48kHz Stereo HP

DAC ª HP 24-bit, music filters, 256Fs

DAC Playback 48kHz Stereo HP

DAC ª HP 24-bit, music filters, 256Fs, 0.1mW/ channel, R

DAC Playback 44.1kHz Stereo HP

DAC ª HP 24-bit, music filters

DAC Playback 44.1kHz Stereo HP

DAC ª HP Low power mode, 24-bit, music filters

DAC Playback 8kHz Stereo HP

DAC ª HP 16-bit, voice filters

DAC Playback 8kHz Stereo HP

DAC ª HP 16-bit, low power mode, voice filters

DAC Playback 8kHz Mono HP

DAC ª HP 16-bit, low power mode, voice filters

Line Playback Stereo HP

INA ª HP Single-ended inputs

DAC Playback to Class D Speaker

DAC Playback 48kHz Stereo SPK

DAC ª SPK 24-bit, music filters

PVDD

= 32I

HP

= V

MODE

DVDD

= V

DVDDS1

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Power Consumption (continued)

= V

I

AVDD

(mA)

2.04 1.27 0.00 1.53 0.01 8.72 101

2.04 2.11 0.00 1.74 0.01 10.63 101

2.03 1.27 0.00 1.41 0.01 8.46 101

2.31 0.00 6.33 2.14 0.01 31.44 92

= 1.8V, V

DVDDS2

1.25 0.47 0.00 1.25 0.01 5.34 98

2.04 1.27 0.00 1.07 0.00 7.89 96

1.26 0.47 0.00 0.90 0.00 4.72 96

0.77 0.29 0.00 0.79 0.00 3.33 98

2.40 1.27 0.00 0.02 0.00 6.67 95

I

PVDD

(mA)

SPKLVDD

= V

I

SPKVDD

I

SPKLVDD

(mA)

SPKRVDD

+

= 3.7V, MAS = 0.)

I

DVDD

(mA)

DVDDS1

I

DVDDS2

(mA)

+

POWER

(mW)

DYNAMIC

RANGE (dB)

�� Maxim Integrated Products 26

(V

= V

AVDD

DAC Playback 48kHz Mono SPK

DAC ª SPK 24-bit, music filters

Line Playback Mono SPK

INA ª SPKL Differential inputs

Full Duplex

Full-Duplex 8kHz Mono RCV

MIC1 ª ADC DAC ª REC 16-bit, voice filters

Full-Duplex 8kHz Stereo HP

MIC1/2 ª ADC DAC ª HP 16-bit, mixer, voice filters

PVDD

= V

MODE

DVDD

= V

DVDDS1

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Power Consumption (continued)

= V

I

AVDD

(mA)

1.35 0.00 3.23 1.84 0.01 17.69 92

1.01 0.00 3.24 0.03 0.00 13.83 93

11.19 1.27 0.48 1.28 0.01 26.43

= 1.8V, V

DVDDS2

6.32 0.00 1.54 1.24 0.01 19.33

I

PVDD

(mA)

SPKLVDD

= V

I

SPKVDD

I

SPKLVDD

(mA)

SPKRVDD

+

= 3.7V, MAS = 0.)

I

DVDD

(mA)

DVDDS1

I

DVDDS2

(mA)

+

POWER

(mW)

DYNAMIC

RANGE (dB)

Record = 93

Playback = 94

Record = 93

Playback = 96

Full-Duplex 8kHz Stereo HP

MIC1/2 ª ADC DAC ª HP 16-bit, low power mode, voice filters

Line Record

Line Stereo Record 48kHz

INA ª ADC 24-bit, low power, music filters

Line Stereo Record 48kHz

INA ª ADC Direct pin input, 24bit, low power, music filters

7.12 0.47 0.48 1.10 0.02 17.44

6.19 0.00 0.20 1.31 0.15 14.47 91

5.69 0.00 0.20 1.31 0.12 13.53 93

Record = 93

Playback = 96

�� Maxim Integrated Products 27

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

Microphone to ADC

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (MIC TO ADC)

0

MCLK = 13MHz

-10

LRCLK = 8kHz

-20

FREQ MODE

= 1V

V

IN

AV

MICPRE_

P-P

= 0dB

FREQUENCY (Hz)

1k10010 10k

-30

-40

-50

-60

THD+N RATIO (dB)

-70

-80

-90

-100

TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (MIC TO ADC)

0

MCLK = 12.288MHz

-10

LRCLK = 96kHz

-20

NI MODE VIN = 1V

-30

-40

-50

-60

THD+N RATIO (dB)

-70

-80

-90

-100

P-P

AV

= 0dB

MICPRE_

10 100k

FREQUENCY (Hz)

TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (MIC TO ADC)

0

MCLK = 13MHz

-10

MAX98089 toc01

THD+N RATIO (dB)

LRCLK = 44.1kHz PLL MODE

-20

= 1V

V

IN

-30

-40

-50

-60

-70

-80

-90

P-P

AV

= 0dB

MICPRE_

10 100k

FREQUENCY (Hz)

10k1k100

MAX98089 toc02

TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (MIC TO ADC)

0

MCLK = 13MHz

-10

MAX98089 toc04

10k1k100

LRCLK = 8kHz

-20

FREQ MODE

= 0.1V

V

IN

-30

AV

MICPRE_

-40

-50

-60

THD+N RATIO (dB)

-70

-80

-90

-100

P-P

= +20dB

FREQUENCY (Hz)

MAX98089 toc05

1k10010 10k

TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (MIC TO ADC)

0

MCLK = 12.288MHz

-10

LRCLK = 48kHz

-20

NI MODE

= 1V

V

IN

-30

-40

-50

-60

THD+N RATIO (dB)

-70

-80

-90

-100

P-P

AV

= 0dB

MICPRE_

10 100k

FREQUENCY (Hz)

TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (MIC TO ADC)

0

MCLK = 13MHz

-10

LRCLK = 8kHz

-20

FREQ MODE

= 0.032V

V

IN

MICPRE_

P-P

= +30dB

FREQUENCY (Hz)

1k10010 10k

-30

AV

-40

-50

-60

THD+N RATIO (dB)

-70

-80

-90

-100

MAX98089 toc03

10k1k100

MAX98089 toc06

�� Maxim Integrated Products 28

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

GAIN vs. FREQUENCY (MIC TO ADC)

10

0

-10

-20

-30

-40

-50

MCLK = 13MHz

-60

NORMALIZED GAIN (dB)

LRCLK = 8kHz FREQ MODE

-70

V

= 1V

IN

AV

MICPRE_

P-P

= 0dB

FREQUENCY (Hz)

-80

-90

FFT, 0dBFS (MIC TO ADC)

20

0

-20

-40

-60

-80

-100

AMPLITUDE (dBFS)

-120

-140

-160

-180 0

FREQUENCY (kHz)

MODE = 1

MODE = 0

1k10010 10k

MCLK = 13MHz

LRCLK = 8kHz

FREQ MODE

= 0dB

AV

MICPRE

321 4

MAX98089 toc07

CMRR (dB)

MAX98089 toc10

AMPLITUDE (dBFS)

COMMON-MODE REJECTION

RATIO vs. FREQUENCY (MIC TO ADC)

90

80

70

60

50

40

30

20

10

0

10

AV

MCLK = 13MHz LRCLK = 8kHz FREQ MODE VIN = 1V

P-P

CIN = 1µF

= 20dB

PRE

= 30dB

PRE

= 0dB

PRE

FREQUENCY (Hz)

FFT, -60dBFS (MIC TO ADC)

0

-20

-40

-60

-80

-100

-120

-140

-160

-180

FREQUENCY (Hz)

1k100 10k

MCLK = 13MHz

LRCLK = 8kHz

FREQ MODE

= 0dB

AV

MICPRE_

3.5k3k2k 2.5k1k 1.5k5000 4k

120

100

MAX98089 toc08

PSRR (dB)

MAX98089 toc11

AMPLITUDE (dBFS)

-100

-120

-140

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY (MIC TO ADC)

RIPPLE ON SPKLVDD, SPKRVDD

80

60

40

20

0

RIPPLE ON AVDD, DVDD, HPVDD

MCLK = 12.288MHz LRCLK = 48kHz NI MODE AV

= 0dB

MICPRE

CIN = 1µF V

= 200mV

RIPPLE

10 100k

P-P

10k1k100

FREQUENCY (Hz)

FFT, 0dBFS (MIC TO ADC)

20

0

-20

-40

-60

-80

0 20

FREQUENCY (kHz)

MCLK = 13MHz

LRCLK = 44.1kHz

PLL MODE

AV

MICPRE_

C

IN

15105

MAX98089 toc09

MAX98089 toc12

= 0dB = 1µF

�� Maxim Integrated Products 29

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

0

-20

-40

-60

-80

AMPLITUDE (dBFS)

-100

-120

-140

FFT, -60dBFS (MIC TO ADC)

0

-20

-40

-60

-80

AMPLITUDE (dBFS)

-100

-120

-140

FFT, -60dBFS (MIC TO ADC)

MCLK = 13MHz

LRCLK = 44.1kHz

PLL MODE

AV

MICPRE

151050 20

FREQUENCY (kHz)

MCLK = 12.288MHz

LRCLK = 48kHz

NI MODE

AV

MICPRE_

151050 20

FREQUENCY (kHz)

= 0dB

MAX98089 toc13

MAX98089 toc15

20

0

-20

-40

-60

-80

AMPLITUDE (dBFS)

-100

-120

-140 0 20

MCLK = 12.288MHz

AV

FREQUENCY (kHz)

FFT, 0dBFS (MIC TO ADC)

20

FFT, 0dBFS (MIC TO ADC)

0

-20

-40

-60

-80

AMPLITUDE (dBFS)

-100

-120

-140 0 20

MCLK = 12.288MHz

LRCLK = 96kHz

AV

FREQUENCY (kHz)

LRCLK = 48kHz

NI MODE

= 0dB

MICPRE

C

= 1µF

IN

NI MODE

= 0dB

MICPRE

C

= 1µF

IN

MAX98089 toc14

18162 4 6 10 128 14

MAX98089 toc16

18162 4 6 10 128 14

�� Maxim Integrated Products 30

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

FFT, -60dBFS (MIC TO ADC)

0

-20

-40

-60

-80

AMPLITUDE (dBFS)

-100

-120

-140

MCLK = 12.288MHz

AV

FREQUENCY (kHz)

LRCLK = 96kHz

NI MODE

MICPRE_

151050 20

MAX98089 toc17

= 0dB

SOFTWARE TURN-ON/OFF RESPONSE

(MIC TO ADC)

MAX98089 toc19

ADC ENABLE/DISABLE RESPONSE

(MIC TO ADC)

10ms/div

SCL 1V/div

MAX98089 toc18

SCL 2V/div

ADC OUTPUT

0.5V/div

ADC OUTPUT

0.5V/div

10ms/div

�� Maxim Integrated Products 31

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

SPKLVDD

MICPGA_

REC

= 0dB, AV

Line to ADC

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (LINE TO ADC)

0

-10

-20

-30

-40

-50

-60

THD+N RATIO (dB)

-70

-80

-90

-100

FREQUENCY (Hz)

TOTAL HARMONIC DISTORTION PLUS NOISE

0

-10

-20

-30

-40

-50

THD+N (dB)

-60

-70

-80

-90

-100 10 100k

0

MCLK = 12.288MHz

LRCLK = 48kHz

NI MODE

= 1.4V

V

IN

AV

= -6dB

PGAIN_

= 1µF

C

IN

10k1k10010 100k

P-P

MAX98089 toc20

THD+N RATIO (dB)

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

vs. FREQUENCY (LINE-IN TO ADC)

MCLK = 12.288MHz

LRCLK = 48kHz

VIN = 1V

EXTERNAL GAIN MODE

FREQUENCY (Hz)

R

EXT

10k1k100

= 56kI

TOTAL HARMONIC DISTORTION PLUS

NOISE vs. FREQUENCY (LINE TO ADC)

MCLK = 12.288MHz

LRCLK = 48kHz

NI MODE

= 1V

V

IN

P-P

= 0dB

PGAIN_

= 1µF

C

IN

10k1k10010 100k

120

100

80

60

PSRR (dB)

40

20

0

RMS

AV

FREQUENCY (Hz)

MAX98089 toc23

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (LINE TO ADC)

0

-10

MAX98089 toc21

-20

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80 10 100k

FREQUENCY (Hz)

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY (LINE TO ADC)

V

= 200mV

RIPPLE

RIPPLE ON SPKLVDD, SPKRVDD

RIPPLE ON AVDD, DVDD, HPVDD

FREQUENCY (Hz)

P-P

10k1k10010 100k

MCLK = 12.288MHz

LRCLK = 48kHz

NI MODE

V

= 0.1V

IN

AV

= +20dB

PGAIN_

10k1k100

MAX98089 toc24

P-P

MAX98089 toc22

�� Maxim Integrated Products 32

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

MICPGA_

= 0dB, AV

REC

SPKLVDD

= V

= 0dB, AV

SPK_

Line-In Pin Direct to ADC

SPKRVDD

DACATTN

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

C1N-C1P

= 0dB,

=

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (LINE TO ADC PIN DIRECT)

0

-10

-20

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90 10 100k

MCLK = 12.288MHz

FREQUENCY (Hz)

LRCLK = 48kHz

NI MODE

= 1V

V

IN

AV

PGAIN_

CIN = 1µF

10k1k100

FFT, 0dBFS (SDINS1 TO SDINS2

DIGITAL LOOPBACK)

0

-20

-40

-60

-80

-100

AMPLITUDE (dBFS)

-120

-140

-160

-180 0 20

FREQUENCY (kHz)

MCLK = 12.288MHz

LRCLK = 48kHz

15105

MAX98089 toc25

P-P

= 0dB

Digital Loopback

NI MODE

MAX98089 toc27

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY (LINE TO ADC PIN DIRECT)

120

V

= 200mV

100

80

60

PSRR (dB)

40

20

0

RIPPLE ON SPKLVDD, SPKRVDD

RIPPLE ON AVDD, DVDD, HPVDD

RIPPLE

10k1k10010 100k

FREQUENCY (Hz)

FFT, -60dBFS (SDINS1 TO SDINS2

DIGITAL LOOPBACK)

0

-20

-40

-60

-80

-100

AMPLITUDE (dBFS)

-120

-140

-160

-180 0 20

MCLK = 12.288MHz

LRCLK = 48kHz

15105

FREQUENCY (kHz)

P-P

NI MODE

MAX98089 toc26

MAX98089 toc28

�� Maxim Integrated Products 33

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

Analog Loopback

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

TOTAL HARMONIC DISTORTION PLUS

NOISE vs. FREQUENCY

(LINE TO ADC TO DAC TO HEADPHONE)

0

MCLK = 13MHz

-10

LRCLK = 44.1kHz PLL MODE

-20

RHP = 32I

-30

C

= 10µF

IN

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

P

= 0.02W

OUT

P

= 0.01W

OUT

10 100k

FREQUENCY (Hz)

FFT, -60dBFS (LINE TO ADC TO DAC

TO HEADPHONE)

0

-20

-40

-60

-80

AMPLITUDE (dBV)

-100

-120

-140

FREQUENCY (kHz)

MCLK = 13MHz

LRCLK = 44.1kHz

10k1k100

PLL MODE

= 32I

R

HP

C

= 1µF

IN

151050 20

MAX98089 toc29

MAX98089 toc32

TOTAL HARMONIC DISTORTION PLUS

NOISE vs. FREQUENCY

(LINE TO ADC TO DAC TO HEADPHONE)

0

MCLK = 12.288MHz

-10

LRCLK = 48kHz NI MODE

-20

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

= 32I

R

HP

C

= 10µF

IN

P

= 0.02W

OUT

P

= 0.01W

OUT

10010 100k

1k

FREQUENCY (Hz)

FFT, 0dBFS (LINE TO ADC TO DAC

TO HEADPHONE)

20

0

-20

-40

-60

-80

AMPLITUDE (dBV)

-100

-120

-140 0 20

MCLK = 12.288MHz

FREQUENCY (kHz)

10k

LRCLK = 48kHz

NI MODE

= 32I

R

HP

C

= 1µF

IN

15105

MAX98089 toc30

MAX98089 toc33

(LINE TO ADC TO DAC TO HEADPHONE)

FFT, 0dBFS

20

0

-20

-40

-60

AMPLITUDE (dBV)

-80

-100

-120

FREQUENCY (kHz)

FFT, -60dBFS (LINE TO ADC TO DAC

TO HEADPHONE)

0

MCLK = 12.288MHz

-20

-40

-60

-80

AMPLITUDE (dBV)

-100

-120

-140

FREQUENCY (kHz)

MCLK = 13MHz

LRCLK = 44.1kHz

PLL MODE RHP = 32I

C

= 1µF

IN

LRCLK = 48kHz

NI MODE

= 32I

R

HP

C

= 1µF

IN

151050 20

MAX98089 toc31

18162 4 6 10 128 140 20

MAX98089 toc34

�� Maxim Integrated Products 34

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

= V

SPKRVDD

= 0dB, AV

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

MICPGA_

= 0dB, AV

REC

SPKLVDD

DAC to Receiver

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

TOTAL HARMONIC DISTORTION

vs. OUTPUT POWER (DAC TO RECEIVER)

0

MCLK = 13MHz

-10 LRCLK = 8kHz

FREQ MODE

-20 R

= 32I

REC

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

= +8dB

AV

REC

f = 1000Hz

0 0.12

f = 3000Hz

OUTPUT POWER (W)

GAIN vs. FREQUENCY

(DAC TO RECEIVER)

5

MCLK = 13MHz

4

LRCLK = 8kHz

3

FREQ MODE

= 32I

R

REC

2

1

0

-1

-2

NORMALIZED GAIN (dB)

-3

-4

-5

FREQUENCY (Hz)

f = 100Hz

0.100.080.060.040.02

0

-10

MAX98089 toc35

-20

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

250

200

MAX98089 toc38

150

100

POWER CONSUMPTION (mW)

50

10k1k10010

0

TOTAL HARMONIC DISTORTION

vs. FREQUENCY (DAC TO RECEIVER)

MCLK = 13MHz LRCLK = 8kHz FREQ MODE R

= 32I

REC

= +8dB

AV

REC

P

= 0.025W

OUT

P

= 0.05W

OUT

10 10k

FREQUENCY (Hz)

1k100

POWER CONSUMPTION vs. OUTPUT

POWER (DAC TO RECEIVER)

MCLK = 13MHz LRCLK = 8kHz FREQ MODE AV

= +8dB

REC

R

= 32I

REC

0 140

OUTPUT POWER PER CHANNEL (mW)

12080 100604020

OUTPUT POWER vs. SUPPLY VOLTAGE

(DAC TO RECEIVER)

200

180

MAX98089 toc36

160

140

120

100

OUTPUT POWER PER CHANNEL (mW)

80

60

2.5 5.5

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY (DAC TO RECEIVER)

120

V

= 200mV

RIPPLE

100

MAX98089 toc39

80

60

PSRR (dB)

40

20

0

10 100k

RIPPLE ON SPKLVDD, SPKRVDD

RIPPLE ON AVDD, DVDD, HPVDD

THD+N = 10%

MCLK = 13MHz

THD+N = 1%

SUPPLY VOLTAGE (V)

P-P

FREQUENCY (Hz)

LRCLK = 8kHz

FREQ MODE

R

= 32I

REC

AV

= +8dB

REC

5.04.54.03.53.0

10k1k100

MAX98089 toc37

MAX98089 toc40

�� Maxim Integrated Products 35

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

SOFTWARE TURN-ON/OFF RESPONSE

(DAC TO RECEIVER, VSEN = 0)

10ms/div

FFT, 0dBFS (DAC TO RECEIVER)

20

0

-20

-40

-60

-80

AMPLITUDE (dBV)

-100

-120

-140

FREQUENCY (kHz)

MAX98089 toc41

MCLK = 13MHz

LRCLK = 8kHz

FREQ MODE

= 32I

R

REC

151050 20

SCL 2V/div

RECEIVER OUTPUT

0.5V/div

MAX98089 toc43

SOFTWARE TURN-ON/OFF RESPONSE

(DAC TO RECEIVER, VSEN = 1)

10ms/div

FFT, -60dBFS (DAC TO RECEIVER)

0

MCLK = 13MHz

-20

-40

-60

-80

AMPLITUDE (dBV)

-100

-120

-140

FREQUENCY (kHz)

MAX98089 toc42

LRCLK = 8kHz

FREQ MODE

= 32I

R

REC

151050 20

SCL 1V/div

RECEIVER OUTPUT 1V/div

MAX98089 toc44

�� Maxim Integrated Products 36

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

= V

SPKRVDD

= 0dB, AV

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

MICPGA_

= 0dB, AV

REC

SPKLVDD

Line to Receiver

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. OUTPUT POWER

(LINE TO RECEIVER)

0

-10

-20

-30

-40

THD+N RATIO (dB)

-50

-60

-70

f = 100Hz

0 0.10

f = 1000Hz

OUTPUT POWER (W)

AV

f = 6000Hz

GAIN vs. FREQUENCY

(LINE TO RECEIVER)

5

R

= 32I

REC

4

= 1µF

C

IN

3

2

1

0

-1

-2

NORMALIZED GAIN (dB)

-3

-4

-5 10 100k

FREQUENCY (Hz)

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. FREQUENCY

(LINE TO RECEIVER)

0

R

= 32I

R

= 32I

REC

= +8dB

REC

C

IN

0.080.060.040.02

= 1µF

MAX98089 toc45

REC

-10

AV

= +8dB

REC

= 1µF

C

IN

-20

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90 10 100k

P

= 0.025W

OUT

P

= 0.05W

OUT

FREQUENCY (Hz)

MAX98089 toc46

10k1k100

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY (LINE TO RECEIVER)

120

V

= 200mV

RIPPLE

MAX98089 toc47

10k1k100

100

80

60

PSRR (dB)

40

20

0

10 100k

P-P

MAX98089 toc48

RIPPLE ON SPKLVDD, SPKRVDD

RIPPLE ON AVDD, DVDD, HPVDD

10k1k100

FREQUENCY (Hz)

�� Maxim Integrated Products 37

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

DAC-to-Line Output

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

INBAND OUTPUT SPECTRUM,

20

0

-20

-40

-60

-80

AMPLITUDE (dBV)

-100

-120

-140 0 20

TOTAL HARMONIC DISTORTION PLUS

NOISE vs. OUTPUT LEVEL

(LINE-IN TO LINE-OUT)

0

R

= 10kI

LOAD

-10

-20

-30

-40

-50

THD+N (dB)

-60

-70

-80

-90 0 1.4

f = 6kHz

f = 1kHz

OUTPUT LEVEL (V

f = 100Hz

RMS

0dBFS (DAC TO LINE)

MCLK = 13MHz

LRCLK = 8kHz

FREQ MODE

R

LOAD

FREQUENCY (kHz)

MAX98089 toc51

1.21.00.6 0.80.40.2

)

= 10kI

MAX98089 toc49

15105

-20

-40

-60

-80

AMPLITUDE (dBV)

-100

-120

-140

Line-to-Line Output

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (LINE IN TO LINE OUT)

0

= 10kI

R

LINE

-10

-20

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

V

= 0.8V

OUT

RMS

V

= 0.2V

OUT

RMS

10 100k

FREQUENCY (Hz)

10k1k100

INBAND OUTPUT SPECTRUM,

-60dBFS (DAC TO LINE)

0

FREQUENCY (kHz)

0

-10

MAX98089 toc52

-20

-30

-40

-50

THD+N (dB)

-60

-70

-80

-90

-100

MCLK = 13MHz

LRCLK = 8kHz

FREQ MODE

= 10kI

R

LINE

162 4 6 10 128 140 20

MAX98089 toc50

18

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (LINE-IN TO LINE-OUT)

VIN = 1V

RMS

R

= 10kI

LINE

EXTERNAL GAIN MODE R

= 56kI

EXT

10 100k

FREQUENCY (Hz)

10k1k100

MAX98089 toc53

�� Maxim Integrated Products 38

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

= V

SPKRVDD

= 0dB, AV

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

MICPGA_

= 0dB, AV

REC

SPKLVDD

DAC to Speaker

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (DAC TO SPEAKER)

0

V

= 4.2V

SPK_VDD

-10

MCLK = 12.288MHz LRCLK = 48kHz

-20 NI MODE

Z

= 8I + 68µH

SPK_

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

= +8dB

AV

SPK_

f = 100Hz

0 1.4

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (DAC TO SPEAKER)

0

V

= 3.0V

SPK_VDD

MCLK = 12.288MHz

-10 LRCLK = 48kHz

-20

NI MODE Z

= 8I + 33µH

SPK

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

= +8dB

AV

SPK

f = 6000Hz

f = 1000Hz

f = 100Hz

0 0.8

OUTPUT POWER (W)

f = 6000Hz

f = 1000Hz

OUTPUT POWER (W)

MAX98089 toc56

0.70.60.1 0.2 0.3 0.4 0.5

-10

MAX98089 toc54

1.21.00.6 0.80.40.2

-20

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (DAC TO SPEAKER)

0

V

= 5.0V

SPK_VDD

-10

MCLK = 12.288MHz LRCLK = 48kHz

-20 NI MODE

Z

= 4I + 33µH

SPK_

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

0 3.5

= +8dB

AV

SPK_VOL

TQFN PACKAGE

f = 100Hz

f = 6000Hz

f = 1000Hz

OUTPUT POWER (W)

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (DAC TO SPEAKER)

0

V

= 3.7V

SPK_VDD

MCLK = 12.288MHz LRCLK = 48kHz NI MODE Z

= 8I + 68µH

SP_

= +8dB

AV

SPK_

f = 6000Hz

f = 1000Hz

f = 100Hz

0 1.0

OUTPUT POWER (W)

0.80.60.40.2

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (DAC TO SPEAKER)

0

V

= 5.0V

SPK_VDD

-10

MCLK = 12.288MHz

MAX98089 toc57a

3.02.51.5 2.01.00.5

LRCLK = 48kHz

-20 NI MODE

Z

= 4I + 33µH

SPK_

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

0 3.5

= +8dB

AV

SPK_VOL

WLP PACKAGE

f = 100Hz

f = 6000Hz

f = 1000Hz

OUTPUT POWER (W)

MAX98089 toc55

MAX98089 toc57b

3.02.51.5 2.01.00.5

�� Maxim Integrated Products 39

(V

OUTPUT POWER (W)

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (DAC TO SPEAKER)

0

V

= 4.2V

SPK_VDD

-10 MCLK = 12.288MHz

LRCLK = 48kHz

-20 NI MODE

-30

Z

= 4I + 33µH

SPK_

= +8dB

AV

SPK_VOL

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

0

f = 100Hz

f = 6000Hz

f = 1000Hz

1.5 2.01.00.5

OUTPUT POWER (W)

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (DAC TO SPEAKER)

0

V

= 4.2V

SPK_VDD

-10

MCLK = 12.288MHz LRCLK = 48kHz

-20 NI MODE

Z

= 8I + 68µH

SP_

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

= +8dB

AV

SPK_

P

= 0.25W

OUT

P

= 0.55W

OUT

100 100k

FREQUENCY (Hz)

10k1k

MAX98089 toc58

2.5

MAX98089 toc61

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (DAC TO SPEAKER)

0

V

= 3.7V

SPK_VDD

-10 MCLK = 12.288MHz

LRCLK = 48kHz

-20 NI MODE

-30

Z

= 4I + 33µH

SPK_

= +8dB

AV

SPK_VOL

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

f = 100Hz

f = 6000Hz

f = 1000Hz

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (DAC TO SPEAKER)

0

V

= 3.7V

SPK_VDD

-10

MCLK = 12.288MHz LRCLK = 48kHz

-20 NI MODE

Z

= 8I + 68µH

SPK_

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

= +8dB

AV

SPK_

P

= 0.55W

OUT

P

= 0.25W

OUT

100 100k

FREQUENCY (Hz)

10k1k

1.81.61.2 1.40.4 0.6 0.8 1.00.20 2.0

MAX98089 toc59

THD+N RATIO (dB)

MAX98089 toc62

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (DAC TO SPEAKER)

0

V

= 3.0V

SPK_VDD

-10

MCLK = 12.288MHz LRCLK = 48kHz

-20 NI MODE

Z

= 4I + 33µH

SP_

-30

-40

-50

-60

-70

-80

-90

AV

SPK_

f = 100Hz

= +8dB

f = 6000Hz

f = 1000Hz

0.80.2 0.4 0.60 1.2

OUTPUT POWER (W)

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (DAC TO SPEAKER)

0

V

= 4.2V

SPK_VDD

MCLK = 12.288MHz

-10 LRCLK = 48kHz

-20

NI MODE Z

= 4I + 33µH

SPK_

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

= +8dB

AV

SPK_

P

= 0.55W

OUT

P

= 0.25W

OUT

100 100k

FREQUENCY (Hz)

10k1k

MAX98089 toc60

1.0

MAX98089 toc63

�� Maxim Integrated Products 40

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (DAC TO SPEAKER)

0

MCLK = 12.288MHz

-10

LRCLK = 48kHz NI MODE

-20

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

Z AV

SPK_

= 4I + 33µH

= +8dB

OUTPUT POWER vs. SUPPLY VOLTAGE

(DAC TO SPEAKER)

2500

MCLK = 12.288MHz LRCLK = 48kHz NI MODE

2000

1500

1000

500

OUTPUT POWER PER CHANNEL (mW)

= 8I + 68µH

Z

SPK_

AV

= +8dB

SPK_

WLP PACKAGE

THD+N = 10%

THD+N = 1%

0

2.5 5.5 SUPPLY VOLTAGE (V)

P

= 0.25W

OUT

P

= 0.55W

OUT

FREQUENCY (Hz)

MAX98089 toc65b

5.04.54.03.53.0

MAX98089 toc64

10k1k10010 100k

OUTPUT POWER vs. SUPPLY VOLTAGE

(DAC TO SPEAKER)

4000

MCLK = 12.288MHz LRCLK = 48kHz

3500

NI MODE

3000

2500

2000

1500

1000

OUTPUT POWER PER CHANNEL (mW)

500

= 4I + 33µH

Z

SPK_

AV

= +8dB

SPK_

TQFN PACKAGE

0

2.5 5.5

THD+N = 10%

THD+N = 1%

SUPPLY VOLTAGE (V)

OUTPUT POWER vs. SUPPLY VOLTAGE

(DAC TO SPEAKER)

2500

MCLK = 12.288MHz LRCLK = 48kHz NI MODE

2000

1500

1000

500

OUTPUT POWER PER CHANNEL (mW)

= 8I + 68µH

Z

SPK_

AV

= +8dB

SPK_

TQFN PACKAGE

THD+N = 10%

THD+N = 1%

0

2.5 5.5 SUPPLY VOLTAGE (V)

OUTPUT POWER vs. SUPPLY VOLTAGE

4000

MCLK = 12.288MHz LRCLK = 48kHz

3500

MAX98089 toc66

5.04.53.0 3.5 4.0

NI MODE

3000

2500

2000

1500

1000

OUTPUT POWER PER CHANNEL (mW)

500

= 4I + 33µH

Z

SPK_

AV

= +8dB

SPK_

WLP PACKAGE

0

2.5 5.5

MAX98089 toc65a

5.04.54.03.53.0

(DAC TO SPEAKER)

THD+N = 10%

THD+N = 1%

SUPPLY VOLTAGE (V)

MAX98089 toc67

5.04.53.0 3.5 4.0

�� Maxim Integrated Products 41

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

100

Z

SPK

90

80

75

60

50

40

EFFICIENCY (%)

30

20

10

0

GAIN vs. FREQUENCY

(DAC TO SPEAKER)

5

MCLK = 12.288MHz

4

LRCLK = 48kHz

3

NI MODE Z

= 8I + 68µH

SPK_

2

1

0

-1

-2

NORMALIZED GAIN (dB)

-3

-4

-5

FREQUENCY (Hz)

EFFICIENCY vs. OUTPUT

POWER (DAC TO SPEAKER)

= 8I + 68µH

Z

= 4I + 33µH

SPK

V

= 4.2V

SPK_VDD

MCLK = 12.288MHz LRCLK = 48kHz NI MODE AV

= +8dB

SKP_

16001200400 8000 2000

OUTPUT POWER PER CHANNEL (mW)

EFFICIENCY vs. OUTPUT

POWER (DAC TO SPEAKER)

100

Z

= 8I + 68µH

SPK

90

MAX98089 toc68

10k1k10010 100k

EFFICIENCY vs. OUTPUT POWER

(DAC TO SPEAKER)

100

Z

= 8I + 68uH

SPK

90

MAX98089 toc70

80

70

Z

60

50

40

EFFICIENCY (%)

30

20

10

0

18001400600 1000200

OUTPUT POWER PER CHANNEL (mW)

= 4I + 33uH

SPK

80

70

60

50

40

EFFICIENCY (%)

30

20

10

0

0 2.0

MCLK = 12.288MHz LRCLK = 48kHz NI MODE AV

= +8dB

SKP_

14001200800 1000400 6002000 1600

Z

= 4I + 33µH

SPK

V

= 4.2V

SPK_VDD

MCLK = 12.288MHz LRCLK = 48kHz NI MODE AV

= +8dB

SKP_

1.51.00.5

OUTPUT POWER PER CHANNEL (W)

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY (DAC TO SPEAKER)

120

V

= 200mV

RIPPLE

100

MAX98089 toc71

80

60

PSRR (dB)

40

20

0

MAX98089 toc69

P-P

RIPPLE ON SPKLVDD, SPKRVDD

RIPPLE ON AVDD, DVDD, HPVDD

1k

FREQUENCY (Hz)

MAX98089 toc72

100k

10k10010

�� Maxim Integrated Products 42

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

vs. FREQUENCY (DAC TO SPEAKER)

CROSSTALK

0

MCLK = 12.288MHz LRCLK = 48kHz

-20 NI MODE

Z

= 8I + 68µH

SPK_

-40

-60

CROSSTALK (dB)

-80

-100

-120

LEFT TO RIGHT

RIGHT TO LEFT

1k

FREQUENCY (Hz)

FFT, -60dBFS (DAC TO SPEAKER)

20

MCLK = 12.2888MHz

0

LRCLK = 48kHz NI MODE

-20

-40

-60

-80

AMPLITUDE (dBV)

-100

-120

-140

= 8I + 68µH

Z

SPK_

0 20

FREQUENCY (kHz)

SOFTWARE TURN-ON/OFF RESPONSE

(DAC TO SPEAKER, VSEN = 0)

MAX98089 toc73

10k10010

100k

10ms/div

MAX98089 toc74

SCL 1V/div

SPEAKER OUTPUT 1V/div

FFT, -60dBFS (DAC TO SPEAKER)

0

MCLK = 13MHz

-20

MAX98089 toc76

15105

LRCLK = 44.1kHz PLL MODE Z

-40

-60

-80

AMPLITUDE (dBV)

-100

-120

-140

= 8I + 68µH

SPK_

0 20

FREQUENCY (kHz)

MAX98089 toc77

15105

SOFTWARE TURN-ON/OFF RESPONSE

(DAC TO SPEAKER, VSEN = 1)

10ms/div

WIDEBAND FFT (DAC TO SPEAKER)

0

-20

-40

-60

AMPLITUDE (dBm)

-80

-100 1 100

FREQUENCY (MHz)

MCLK = 13MHz LRCLK = 44.1kHz PLL MODE Z

SPK_

10

MAX98089 toc75

= 8I + 68µH

SCL 1V/div

SPEAKER OUTPUT 1V/div

MAX98089 toc78

�� Maxim Integrated Products 43

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

= V

SPKRVDD

= 0dB, AV

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

MICPGA_

= 0dB, AV

REC

SPKLVDD

Line to Speaker

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (LINE TO SPEAKER)

0

Z

= 8I + 68µH

SPK

= +8dB

AV

-10

SPK_

C

= 1µF

IN

-20

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80 0 1.0

OUTPUT POWER (W)

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY (LINE TO SPEAKER)

90

80

70

60

RIPPLE ON AVDD,

50

DVDD, HPVDD

40

PSRR (dB)

30

20

10

0

10 100k

0.80.60.2 0.4

RIPPLE ON SPKLVDD,

INPUTS AC GROUNDED

V

RIPPLE

FREQUENCY (Hz)

MAX98089 toc79

SPKRVDD

= 200mV

10k1k100

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (LINE TO SPEAKER)

0

Z

= 8I + 68µH

SPK_

-10

-20

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

P-P

= +8dB

AV

SPK_

C

= 1µF

IN

P

= 0.5W

OUT

P

= 0.25W

OUT

10 100k

FREQUENCY (Hz)

MAX98089 toc82

10k1k100

CROSSTALK (dB)

-100

-120

0

-20

-40

-60

-80

5

Z

= 8I + 68µH

SPK_

4

= 1µF

C

IN

3

MAX98089 toc80

2

1

0

-1

-2

NORMALIZED GAIN (dB)

-3

-4

-5 10 100k

CROSSTALK vs. FREQUENCY

(LINE TO SPEAKER)

ZFN = 8I + 68µH CIN = 1µF

RIGHT TO LEFT

1k

FREQUENCY (Hz)

GAIN vs. FREQUENCY

(LINE TO SPEAKER)

FREQUENCY (Hz)

MAX98089 toc83

LEFT TO RIGHT

100k

10k10010

MAX98089 toc81

10k1k100

�� Maxim Integrated Products 44

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

DAC to Headphone

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (DAC TO HEADPHONE)

0

MCLK = 13MHz

-10

LRCLK = 8kHz FREQ MODE

-20 = 32I

R

HP

AV

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

= +3dB

HP_

TQFN PACKAGE

f = 3000Hz

f = 1000Hz

0 0.010 0.020 0.030 0.040

0.005 0.015 0.025 0.035 0.045 OUTPUT POWER (W)

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (DAC TO HEADPHONE)

0

MCLK = 13MHz

-10

LRCLK = 44.1kHz PLL MODE

-20 = 32I

R

HP

AV

= +3dB

HP_

-30

TQFN PACKAGE

-40

-50

f = 1000Hz

THD+N RATIO (dB)

-60

-70

-80

-90

0 0.010 0.020 0.030 0.040

0.005 0.015 0.025 0.035 0.045

f = 6000Hz

f = 100Hz

OUTPUT POWER (W)

f = 100Hz

MAX98089 toc86

THD+N RATIO (dB)

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (DAC TO HEADPHONE)

0

MCLK = 13MHz

-10

LRCLK = 8kHz

MAX98089 toc84

FREQ MODE

-20 R

AV

-30 WLP PACKAGE

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (DAC TO HEADPHONE)

0

MCLK = 13MHz

-10

LRCLK = 44.1kHz PLL MODE

-20 R

= 32I

HP

AV

-30

-40

-50

-60

-70

-80

-90

= +3dB

HP_

WLP PACKAGE

f = 6000Hz

f = 1000Hz

f = 100Hz

0 0.05

OUTPUT POWER (W)

0.040.030.020.01

= 32I

HP

= +3dB

HP_

f = 1000Hz

f = 3000Hz

f = 100Hz

OUTPUT POWER (W)

TOTAL HARMONIC DISTORTION PLUS NOISE

0

-10

MAX98089 toc87

-20

-30

-40

-50

-60

THD+N RATIO (dB)

-70

-80

-90

-100

MAX98089 toc85

0.030.020.010 0.05

0.04

vs. OUTPUT POWER (DAC TO HEADPHONE)

MCLK = 12.288MHz LRCLK = 48kHz NI MODE

= 32I

R

HP

AV

= +3dB

HP_

TQFN PACKAGE

f = 6000Hz

f = 1000Hz

f = 100Hz

0

0.010 0.020 0.030 0.040 0.050

0.015 0.0250.005 OUTPUT POWER (W)

0.0450.035

MAX98089 toc88

�� Maxim Integrated Products 45

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (DAC TO HEADPHONE)

0

MCLK = 12.288MHz

-10 LRCLK = 48kHz

NI MODE

-20

-30

-40

-50

-60

THD+N RATIO (dB)

-70

-80

-90

-100

= 32I

R

HP

AV

= +3dB

HP_

WLP PACKAGE

f = 6000Hz

f = 1000Hz

f = 100Hz

0.010 0.020 0.030 0.040 0.050

0

0.015 0.0250.005 OUTPUT POWER (W)

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (DAC TO HEADPHONE)

0

MCLK = 12.288MHz

-10 LRCLK = 48kHz

NI MODE

-20

= 16I

R

HP

-30 AV

= +3dB

HP_

TQFN PACKAGE

-40

-50

-60

THD+N RATIO (dB)

f = 100Hz

-70

-80

-90

-100 0 0.07

OUTPUT POWER (W)

f = 6000Hz

f = 1000Hz

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (DAC TO HEADPHONE)

0

MCLK = 12.288MHz

-10 LRCLK = 96kHz

MAX98089 toc89

THD+N RATIO (dB)

-100

0.0450.035

-30

-40

-50

-60

-70

-80

-90

= 32I

R

HP

AV

= +3dB

HP_

TQFN PACKAGE

f = 6000Hz

f = 1000Hz

f = 100Hz

0.010 0.020 0.030 0.040 0.050

0

0.015 0.0250.005 OUTPUT POWER (W)

NI MODE

-20

MAX98089 toc90

0.0450.035

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (DAC TO HEADPHONE)

0

MCLK = 12.288MHz

-10 LRCLK = 48kHz

MAX98089 toc92

0.060.050.03 0.040.020.01

NI MODE

-20

= 16I

R

HP

-30 AV

= +3dB

HP_

WLP PACKAGE

-40

-50

-60

THD+N RATIO (dB)

f = 1000Hz

-70

-80

-90

-100 0 0.07

OUTPUT POWER (W)

f = 6000Hz

f = 100Hz

MAX98089 toc93

0.060.050.03 0.040.020.01

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (DAC TO HEADPHONE)

0

MCLK = 12.288MHz

-10 LRCLK = 96kHz

NI MODE

-20

-30

-40

-50

-60

THD+N RATIO (dB)

-70

-80

-90

-100

= 32I

R

HP

AV

= +3dB

HP_

WLP PACKAGE

f = 6000Hz

f = 1000Hz

f = 100Hz

0.010 0.020 0.030 0.040 0.050

0

0.015 0.0250.005 OUTPUT POWER (W)

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (DAC TO HEADPHONE)

0

MCLK = 12.288MHz

-10

LRCLK = 48kHz 256F

MODE

S

-20 LOW-POWER MODE

RHP = 16I,

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

= +3dB

AV

HP_

TQFN PACKAGE

f = 1000Hz

0 0.07

OUTPUT POWER (W)

f = 6000Hz

f = 100Hz

MAX98089 toc91

0.0450.035

MAX98089 toc94

0.060.050.03 0.040.020.01

�� Maxim Integrated Products 46

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (DAC TO HEADPHONE)

0

MCLK = 12.288MHz

-10

LRCLK = 48kHz 256F

MODE

S

-20 LOW POWER MODE

RHP = 16I

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

= +3dB

AV

HP_

WLP PACKAGE

f = 6000Hz

f = 1000Hz

0 0.07

OUTPUT POWER (W)

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (DAC TO HEADPHONE)

0

MCLK = 13MHz

-10

LRCLK = 44.1kHz PLL MODE

-20 = 32I

R

HP

AV

= +3dB

HP_

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

P

= 0.01W

OUT

P

= 0.02W

OUT

10 100k

FREQUENCY (Hz)

10k1k100

f = 100Hz

MAX98089 toc97

-10

MAX98089 toc95

0.060.050.03 0.040.020.01

-20

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (DAC TO HEADPHONE)

0

MCLK = 12.288MHz

-10 LRCLK = 48kHz

NI MODE

-20

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

= 32I

R

HP

AV

= +3dB

HP_

P

= 0.02W

OUT

P

OUT

10 100k

FREQUENCY (Hz)

10k1k100

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (DAC TO HEADPHONE)

0

MCLK = 13MHz LRCLK = 8kHz FREQ MODE

= 32I

R

HP

AV

= +3dB

HP_

P

= 0.01W

OUT

P

= 0.02W

OUT

10 10k

FREQUENCY (Hz)

1k100

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (DAC TO HEADPHONE)

0

MCLK = 12.288MHz

-10

MAX98089 toc98

= 0.01W

LRCLK = 96kHz NI MODE

-20

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

= 32I

R

HP

AV

= +3dB

HP_

= 0.02W

FREQUENCY (Hz)

P

OUT

10 100k

OUT

MAX98089 toc96

MAX98089 toc99

= 0.02W

10k1k100

�� Maxim Integrated Products 47

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (DAC TO HEADPHONE)

0

MCLK = 12.288MHz

-10 LRCLK = 48kHz

NI MODE

-20

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

= 16I,

R

HP

AV

= +3dB

HP_

P

= 0.01W

P

= 0.02W

OUT

10 100k

OUT

10k1k100

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

TOTAL HARMONIC DISTORTION PLUS NOISE

0

-10

MAX98089 toc100

-20

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

GAIN vs. FREQUENCY (DAC TO HEADPHONE)

10

0

-10

-20

-30

-40

-50 MCLK = 13MHz

-60 LRCLK = 8kHz

FREQ MODE

-70 R

= 32I

HP

-80

10 100k

FREQUENCY (Hz)

MODE = 1

MODE = 0

10k1k100

vs. FREQUENCY (DAC TO HEADPHONE)

MCLK = 12.288MHz LRCLK = 48kHz LOW-POWER MODE

= 16I,

R

HP

AV

= +3dB

HP_

P

= 0.01W

OUT

P

= 0.02W

OUT

10 100k

FREQUENCY (Hz)

MAX98089 toc102

10k1k100

MAX98089 toc101

�� Maxim Integrated Products 48

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

POWER CONSUMPTION vs. OUTPUT

POWER (DAC TO HEADPHONE)

120

MCLK = 12.288MHz LRCLK = 48kHz

100

NI MODE

= +3dB

AV

HP_

80

60

40

POWER CONSUMPTION (mW)

20

0

OUTPUT POWER PER CHANNEL (mW)

RPH = 16I

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY (DAC TO HEADPHONE)

120

100

80

60

PSRR (dB)

40

20

V

0

10 100k

RPH = 32I

1010.1 100

RIPPLE ON AVDD,

PVDD, DVDD

= 200mV

RIPPLE

MAX98089 toc103

RIPPLE ON SPKLVDD,

SPKRVDD

P-P

FREQUENCY (Hz)

CURRENT CONSUMPTION vs. OUTPUT

POWER (DAC TO HEADPHONE)

120

MCLK = 12.288MHz LRCLK = 48kHz

100

LOW-POWER MODE

= +3dB

AV

HP_

80

60

40

CURRENT CONSUMPTION (mA)

20

0

OUTPUT POWER PER CHANNEL (mW)

MAX98089 toc106

10k1k100

RPH = 16I

RPH = 32I

1010.1 100

CROSSTALK (dB)

0

-20

-40

-60

-80

-100

-120

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY (DAC TO HEADPHONE)

120

100

MAX98089 toc104

80

60

PSRR (dB)

40

20

V

RIPPLE

0

10 100k

CROSSTALK vs. FREQUENCY

(DAC TO HEADPHONE)

MCLK = 12.288MHz LRCLK = 48kHz NI MODE

= 32I

R

HP

WLP RIGHT TO LEFT

WLP LEFT TO RIGHT

TQFN LEFT TO RIGHT

TQFN RIGHT TO LEFT

1k

FREQUENCY (kHz)

RIPPLE ON SPKLVDD,

RIPPLE ON AVDD,

DVDD, HPVDD

= 200mV

P-P

FREQUENCY (Hz)

10k10010

SPKRVDD

MAX98089 toc105

10k1k100

MAX98089 toc107

100k

�� Maxim Integrated Products 49

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

SOFTWARE TURN-ON/OFF RESPONSE

(DAC TO HEADPHONE, VSEN = 0)

10ms/div

FFT, 0dBFS (DAC TO HEADPHONE)

20

0

-20

-40

-60

-80

AMPLITUDE (dBV)

-100

-120

-140 0 20

FREQUENCY (kHz)

MAX98089 toc108

MCLK = 13MHz

LRCLK = 8kHz

FREQ MODE

= 32I

R

HP

18162 4 6 10 128 14

SCL 1V/div

HEADPHONE OUTPUT 1V/div

MAX98089 toc110

SOFTWARE TURN-ON/OFF RESPONSE

(DAC TO HEADPHONE, VSEN = 1)

10ms/div

FFT, -60dBFS (DAC TO HEADPHONE)

20

0

-20

-40

-60

-80

AMPLITUDE (dBV)

-100

-120

-140 0 20

FREQUENCY (kHz)

MAX98089 toc109

MCLK = 13MHz

LRCLK = 8kHz

FREQ MODE

= 32I

R

HP

18162 4 6 10 128 14

SCL 1V/div

HEADPHONE OUTPUT 1V/div

MAX98089 toc111

�� Maxim Integrated Products 50

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

INBAND FREQUENCY SPECTRUM,

0dBFS (DAC TO HEADPHONE)

20

0

-20

-40

-60

-80

AMPLITUDE (dBV)

-100

-120

-140 0 20

FFT, 0dBFS (DAC TO HEADPHONE)

20

0

-20

-40

-60

-80

AMPLITUDE (dBV)

-100

-120

-140 0 20

FREQUENCY (kHz)

MCLK = 12.288MHz

FREQUENCY (kHz)

LRCLK = 48kHz

NI MODE

= 32I

R

HP

18162 4 6 10 128 14

MCLK = 13MHz

LRCLK = 44.1kHz

15105

-20

MAX98089 toc114

-40

-60

-80

-100

AMPLITUDE (dBV)

-120

-140

-160

PLL MODE

= 32I

R

HP

MAX98089 toc112

-20

-40

-60

-80

-100

AMPLITUDE (dBV)

-120

-140

-160

FFT, -60dBFS (DAC TO HEADPHONE)

0

0 20

MCLK = 12.288MHz

FREQUENCY (kHz)

LRCLK = 48kHz

R

HP

15105

FFT, -60dBFS (DAC TO HEADPHONE)

0

0 20

FREQUENCY (kHz)

MCLK = 13MHz

LRCLK = 44.1kHz

PLL MODE

= 32I

R

HP

15105

FFT, 0dBFS (DAC TO HEADPHONE)

20

0

NI MODE

= 32I

MAX98089 toc115

-20

-40

-60

-80

AMPLITUDE (dBV)

-100

-120

-140 0 20

MAX98089 toc113

MCLK = 12.288MHz

FREQUENCY (kHz)

LRCLK = 96kHz

NI MODE

= 32I

R

HP

18162 4 6 10 128 14

MAX98089 toc116

�� Maxim Integrated Products 51

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

FFT, -60dBFS (DAC TO HEADPHONE)

0

-20

-40

-60

-80

-100

AMPLITUDE (dBV)

-120

-140

-160 0 20

MCLK = 12.288MHz

FREQUENCY (kHz)

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (LINE TO HEADPHONE)

0

RHP = 32I

-10

-20

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

= +3dB

AV

HP_

f = 100Hz

0.010 0.020 0.030 0.040 0.050

0

LRCLK = 96kHz

NI MODE

= 32I

R

HP

15105

0.015 0.0250.005 OUTPUT POWER (W)

MAX98089 toc117

f = 6000Hz

f = 1000Hz

FFT, 0dBFS (DAC TO HEADPHONE)

20

0

-20

-40

-60

-80

AMPLITUDE (dBV)

-100

-120

-140 0 20

MCLK = 12.288MHz

LOW-POWER MODE

FREQUENCY (kHz)

Line to Headphone

MAX98089 toc120

0.0450.035

FFT, -60dBFS (DAC TO HEADPHONE)

0

LRCLK = 48kHz

= 32I

R

HP

18162 4 6 10 128 14

-20

MAX98089 toc118

-40

-60

-80

AMPLITUDE (dBV)

-100

-120

-140 0 20

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (LINE TO HEADPHONE)

0

RHP = 32I

-10

-20

-30

-40

-50

THD+N RATIO (dB)

-60

-70

-80

-90

= +3dB

AV

HP_

C

= 1µF

IN

P

= 0.02W

OUT

P

= 0.01W

OUT

10 100k

FREQUENCY (Hz)

10k1k100

MCLK = 12.288MHz

LOW POWER MODE

FREQUENCY (kHz)

MAX98089 toc121

LRCLK = 48kHz

MAX98089 toc119

RHP = 32I

15105

�� Maxim Integrated Products 52

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

GAIN vs. FREQUENCY

(LINE TO HEADPHONE)

5

RHP = 32I

4

= 1µF

C

IN

3

2

1

0

-1

-2

NORMALIZED GAIN (dB)

-3

-4

-5 10 100k

FREQUENCY (Hz)

CROSSTALK (dB)

MAX98089 toc122

10k1k100

CROSSTALK vs. FREQUENCY

(LINE TO HEADPHONE)

0

RHP = 32I

= 1µF

C

IN

-20

-40

-60

-80

-100

-120

WLP RIGHT TO LEFT

WLP LEFT TO RIGHT

TQFN RIGHT TO LEFT TQFN LEFT TO RIGHT

1k

FREQUENCY (Hz)

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY (LINE TO HEADPHONE)

120

V

= 200mV

100

PSRR (dB)

10k10010

RIPPLE

80

60

40

20

0

MAX98089 toc124

100k

P-P

RIPPLE ON SPKLVDD,

SPKRVDD

FREQUENCY (Hz)

RIPPLE ON AVDD,

DVDD, HPVDD

10k10010

1k

MAX98089 toc123

100k

�� Maxim Integrated Products 53

(V

AVDD

= V

PVDD

= V

DVDD

= V

DVDDS1

SPK_P and SPK_N. Receiver load (R to HPGND. Line out (R 1FF, C AV

ADCGAIN

HPVDD

= C

HPVSS

= 0dB, AV

) connected from LOUTL or LOUTR to SPKLGND, C

LOUT

= 1FF. AV

= 0dB, AV

PGAIN_

= +25NC, unless otherwise noted.)

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Typical Operating Characteristics (continued)

= V

) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR

REC

MICPRE_

HP_

= 1.8V, V

DVDDS2

= +20dB, AV

= 0dB, AV

MICPGA_

= 0dB, AV

REC

SPKLVDD

= 0dB, AV

Speaker Bypass Switch

= V

SPKRVDD

= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA

SPK_

= 3.7V. Speaker loads (Z

= 2.2FF, C

REF

DACATTN

= 0dB, AV

MICBIAS

DACGAIN

) connected between

SPK

= C

REG

= 1FF, C

= 0dB, AV

ADCLVL

C1N-C1P

= 0dB,

=

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. OUTPUT POWER

(SPEAKER BYPASS SWITCH)

0

RECEIVER AMPLIFIER

-10

DRIVING LOUDSPEAKER Z

= 8I + 68µH

SPK

-20

-30

-40

THD+N (dB)

f = 1000kHz

-50

-60

-70

-80 0 0.25

f = 100Hz

OUTPUT POWER (W)

MAX98089 toc126

f = 6000Hz

0.200.150.05 0.10

OFF-ISOLATION vs. FREQUENCY

(SPEAKER BYPASS SWITCH)

0

SPEAKER AMP DRIVING LOUDSPEAKER SPEAKER BYPASS SWITCH OPEN

-20

MEASURED AT RXIN_

-40

ON-RESISTANCE vs. VCOM

(SPEAKER BYPASS SWITCH)

4.0

ISW = 20mA

3.5

3.0

2.5

(I)

2.0

V

SPK_VDD

ON

R

1.5

1.0

0.5

0

0 6

MAX98089 toc128

= 3.7V

V

SPK_VDD

V

COM

V

= 4.2V

(V)

SPK_VDD

= 3.0V

MAX98089 toc127

= 5.0V

541 2 3

-60

50I LOAD ON RXIN_

-80

OFF-ISOLATION (dB)

RECEIVER AMP DRIVING RXIN_

-100

-120 10k1k10010 100k

FREQUENCY (Hz)

�� Maxim Integrated Products 54

TOP VIEW (BUMP SIDE DOWN)

1 2 3 4 5 6 7 8 9

A

SPKRN

SPKRGND

Low-Power, Stereo Audio Codec

SPKLVDD SPKLP

MAX98089

with FlexSound Technology

Pin Configuration

RECP/

SPKLN

LOUTL/

RXINP

PVDD HPVSS

HPGND

RECN/

B

C

D

E

F

G

SPKRN

SPKRP

BCLKS1

DVDDS1 SDINS1

DGND

SDOUTS2 DVDDS2 SDINS2 MIC2P

SDOUTS1

MCLK IRQ

BCLKS2 LRCLKS2

SPKLVDD SPKLPSPKRGND SPKLN

SPKRVDD

SPKRVDD LRCLKS1

N.C.

SPKLGNDSPKRP SPKLGND N.C

MAX98089

N.C. INB2

SCLSDA REG

AVDDDVDD REF

LOUTR/

RXINN

N.C.

C1P

N.C. HPSNS

N.C.

INB1JACKSNS

MICBIAS

AGND MIC2N

C1N

MIC1P/

DIGMICDATA

MIC1N/

DIGMICCLK

HPVDD

HPL

HPR

INA2/

EXTMICN

INA1/

EXTMICP

�� Maxim Integrated Products 55

TOP VIEW

MIC2N

MICBIAS

JACKSNS

N.C.

AGND

REF

REG

AVDD

SCL

SDA

DVDD

SDINS2

DVDDS2

IRQ

Low-Power, Stereo Audio Codec

with FlexSound Technology

HPVDD

HPL

HPSNS

HPR

INB2

INB1

INA2/EXTMICN

INA1/EXTMICP

MIC1P/DIGMICDATA

MIC1N/DIGMICCLK

MIC2P

42 41 40 39 38 37 36 35 34 33 32 31 30 29

43

44

45

46

47

48

49

50

51

52

53

54

55

56

1

2 3 4 5 6 7 8 9 10 11 12 13 14

MAX98089

Pin Configuration (continued)

HPVSS

HPGND

N.C.

28

N.C.

27

CIN

26

C1P

25

PVDD

24

RECP/LOUTL/RXINP

23

RECN/LOUTR/RXINN

22

SPKLN

21

SPKLGND

20

SPKLP

19

SPKLVDD

18

SPKRVDD

17

SPKRP

EP*

16

15

SPKRGND

SPKRN

N.C.

BCLKS2

SDOUTS2

DGND

MCLK

LRCLKS2

DVDDS1

SDOUTS1

SDINS1

BCLKS1

N.C.

LRCLKS1

N.C.

TQFN

(7mm x 7mm x 0.75mm)

*EP = EXPOSED PAD. CONNECT TO GROUND PLANE.

�� Maxim Integrated Products 56

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Pin Description

BUMP (WLP)

A1, B1 15 SPKRN Negative Right-Channel Class D Speaker Output A2, B2 16 SPKRGND Right-Speaker Ground

A3, B3 19 SPKLVDD

A4, B4 20 SPKLP Positive Left-Channel Class D Speaker Output A5, B5 22 SPKLN Negative Left-Channel Class D Speaker Output

A6 24

A7 25 PVDD

A8 31 HPVSS

A9 30 HPGND Headphone Ground

B6 23

B7 26 C1P

B8 27 C1N

B9 32 HPVDD

C1, C2 17 SPKRP Positive Right-Channel Class D Speaker Output C3, D3 18 SPKRVDD C4, C5 21 SPKLGND Left-Speaker Ground

C6, C7, D5,

D6, D7, E3

C8 34 HPSNS

C9 33 HPL Left-Channel Headphone Output

D1 8 BCLKS1

D2 7 SDOUTS1

D4 10 LRCLKS1

D8 D9 35 HPR Right-Channel Headphone Output

(TQFN-EP)

11–14,

28, 29, 46

36 INB2 Single-Ended Line Input B2. Also positive differential line input B.

NAME FUNCTION

Left-Speaker, REF, Receiver Amp Power Supply. Bypass to SPKLGND with a 1FF and a 10FF capacitor.

RECP/LOUTL/

RXINP

RECN/LOUTR/

RXINN

N.C. No Connection

Positive Receiver Amplifier Output or Left Line Output. Can be positive bypass switch input when receiver amp is shut down.

Headphone Power Supply. Bypass to HPGND with a 1FF and a 10FF capacitor.

Inverting Charge-Pump Output. Bypass to HPGND with a 1FF ceramic capacitor.

Negative Receiver Amplifier Output or Right Line Output. Can be negative bypass switch input when receiver amp is shut down.

Charge-Pump Flying Capacitor Positive Terminal. Connect a 1FF ceramic capacitor between C1N and C1P.

Charge-Pump Flying Capacitor Negative Terminal. Connect a 1FF ceramic capacitor between C1N and C1P.

Noninverting Charge-Pump Output. Bypass to HPGND with a 1FF ceramic capacitor.

Right-Speaker Power Supply. Bypass to SPKRGND with a 1FF capacitor.

Headphone Amplifier Ground Sense. Connect to the headphone jack ground terminal for optimal performance or connect to PCB ground.

S1 Digital Audio Bit Clock Input/Output. BCLKS1 is an input when the IC is in slave mode and an output when in master mode. The input/output voltage is referenced to DVDDS1.

S1 Digital Audio Serial-Data ADC Output. The output voltage is referenced to DVDDS1.

S1 Digital Audio Left-Right Clock Input/Output. LRCLKS1 is the audio sample rate clock and determines whether S1 audio data is routed to the left or right channel. In TDM mode, LRCLKS1 is a frame sync pulse. LRCLKS1 is an input when the IC is in slave mode and an output when in master mode.

�� Maxim Integrated Products 57

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Pin Description (continued)

BUMP (WLP)

E1 6 DVDDS1

E2 5 MCLK Master Clock Input. Acceptable input frequency range is 10MHz to 60MHz.

E4 9 SDINS1

E5 56

E6 45 JACKSNS

E7 37 INB1 Single-Ended Line Input B1. Also negative differential line input B.

E8 40

E9 38

F1 3 DGND Digital Ground

F2 2 BCLKS2

F3 4 LRCLKS2

F4 52 SDA

F5 51 SCL I F6 49 REG

F7 44 MICBIAS

F8 41

F9 39

(TQFN-EP)

NAME FUNCTION

S1 Digital Audio Interface Power-Supply Input. Bypass to DGND with a 1FF capacitor.

S1 Digital Audio Serial-Data DAC Input. The input/output voltage is referenced to DVDDS1.

Hardware Interrupt Output. IRQ can be programmed to pull low when bits in

IRQ

MIC1P/

DIGMICDATA

INA2/

EXTMICN

MIC1N/

DIGMICCLK

INA1/

EXTMICP

status register 0x00 change state. Read status register 0x00 to clear IRQ once set. Repeat faults have no effect on IRQ until it is cleared by reading the I register 0x00. Connect a 10kI pullup resistor to DVDD for full output swing.

Jack Sense. Detects the insertion and removal of a jack. In typical applications, connect JACKSNS to the MIC pole of the jack. See the Jack Detection section.

Positive Differential Microphone 1 Input. AC-couple a microphone with a series 1FF capacitor. Can be retasked as a digital microphone data input.

Single-Ended Line Input A2. Also positive differential line input A or negative differential external microphone input.

S2 Digital Audio Bit Clock Input/Output. BCLKS2 is an input when the IC is in slave mode and an output when in master mode. The input/output voltage is referenced to DVDDS2.

S2 Digital Audio Left-Right Clock Input/Output. LRCLKS2 is the audio sample rate clock and determines whether audio data on S2 is routed to the left or right channel. In TDM mode, LRCLKS2 is a frame sync pulse. LRCLKS2 is an input when the IC is in slave mode and an output when in master mode. The input/output voltage is referenced to DVDDS2.

2

I

C Serial-Data Input/Output. Connect a pullup resistor to DVDD for full output

swing.

2

C Serial-Clock Input. Connect a pullup resistor to DVDD for full output swing. Common-Mode Voltage Reference. Bypass to AGND with a 1FF capacitor.

Low-Noise Bias Voltage. Outputs a 2.2V microphone bias. An external 2.2kI resistor should be placed between MICBIAS and the microphone output.

Negative Differential Microphone 1 Input. AC-couple a microphone with a series 1FF capacitor. Can be retasked as a digital microphone clock output.

Single-Ended Line Input A1. Also negative differential line input A or positive differential external microphone input.

2

C status

�� Maxim Integrated Products 58

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Pin Description (continued)

BUMP (WLP)

G1 1 SDOUTS2

G2 55 DVDDS2

G3 54 SDINS2

G4 53 DVDD

G5 50 AVDD G6 48 REF G7 47 AGND Analog Ground

G8 43 MIC2N

G9 42 MIC2P

— — EP Exposed Pad (TQFN Only). Connect the exposed pad to the PCB ground plane.

(TQFN-EP)

NAME FUNCTION

S2 Digital Audio Serial-Data ADC Output. The output voltage is referenced to DVDDS2.

S2 Digital Audio Interface Power-Supply Input. Bypass to DGND with a 1FF capacitor.

S2 Digital Audio Serial-Data DAC Input. The input voltage is referenced to DVDDS2.

Digital Power Supply. Supply for the digital core and I DGND with a 1FF capacitor.

Analog Power Supply. Bypass to AGND with a 1FF capacitor. Converter Reference. Bypass to AGND with a 2.2FF capacitor.

Negative Differential Microphone 2 Input. AC-couple a microphone with a series 1FF capacitor.

Positive Differential Microphone 2 Input. AC-couple a microphone with a series 1FF capacitor.

2

C interface. Bypass to

�� Maxim Integrated Products 59

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Detailed Description

The MAX98089 is a fully integrated stereo audio codec with FLEXSOUND technology and integrated amplifiers.

Two differential microphone amplifiers can accept signals from three analog inputs. One input can be retasked to support two digital microphones. Any combination of two microphones (analog or digital) can be recorded simultaneously. The analog signals are amplified up to 50dB and recorded by the stereo ADC. The digital record path supports voice filtering with selectable preset highpass filters and high stopband attenuation at f ic gain control (AGC) circuit monitors the digitized signal and automatically adjusts the analog microphone gain to make best use of the ADC’s dynamic range. A noise gate attenuates signals below the user-defined threshold to minimize the noise output by the ADC.

The IC includes two analog line inputs. One of the line inputs can be optionally retasked as a third analog microphone input. Both line inputs support either stereo singleended input signals or mono differential signals. The line inputs are preamplified and then routed to the ADC for recording and/or to the output amplifiers for playback. The single-ended line inputs signals from INA1 and INA2 can bypass the PGAs, and be connected directly to the ADC input to provide the best dynamic range.

Integrated analog switches allow two differential microphone signals to be routed out the third microphone input to an external device. This eliminates the need for an external analog switch in systems that have two devices recording signals from the same microphone.

Through two digital audio interfaces, the device can transmit one stereo audio signal and receive two stereo audio signals in a wide range of formats including I PCM, and up to four mono slots in TDM. Each interface can be connected to either of two audio ports (S1 and S2) for communication with external devices. Both audio interfaces support 8kHz to 96kHz sample rates. Each input signal is independently equalized using 5-band parametric equalizers. A multiband automatic level control (ALC) boosts signals by up to 12dB. One signal path additionally supports the same voiceband filtering as the ADC path.

The IC includes a stereo Class D speaker amplifier, a high-efficiency Class H stereo headphone amplifier, and a differential receiver amplifier that can be configured as a single-ended stereo line output.

/2. An automat-

S

2

S,

When the receiver amplifier is disabled, analog switches allow RECP/RXINP and RECN/RXINN to be reused for signal routing. In systems where a single transducer is used for both the loudspeaker and receiver, an external receiver amplifier can be routed to the left speaker through RECP/RXINP and RECN/RXINN, bypassing the Class D amplifier. If the internal receiver amplifier is used, then leave RECP/RXINP and RECN/RXINN unconnected. In systems where an external amplifier drives both the receiver and the MAX98089’s line input, one of the differential signals can be disconnected from the receiver when not needed by passing it through the analog switch that connects RECP/RXINP to RECN/RXINN.

The stereo Class D amplifier provides efficient amplification for two speakers. The amplifier includes active emissions limiting to minimize the radiated emissions (EMI) traditionally associated with Class D. In most systems, no output filtering is required to meet standard EMI limits.

To optimize speaker sound quality, the IC includes an excursion limiter, a distortion limiter, and a power limiter. The excursion limiter is a dynamic highpass filter with variable corner frequency that increases in response to high signal levels. Low-frequency energy typically causes more distortion than useful sound at high signal levels, so attenuating low frequencies allows the speaker to play louder without distortion or damage. At lower signal levels, the filter corner frequency reduces to pass more low frequency energy when the speaker can handle it. The distortion limiter reduces the volume when the output signal exceeds a preset distortion level. This ensures that regardless of input signal and battery voltage, excessive distortion is never heard by the user. The power limiter monitors the continuous power into the loudspeaker and lowers the signal level if the speaker is at risk of overheating.

The stereo Class H headphone amplifier uses a dualmode charge pump to maximize efficiency while outputting a ground-referenced signal. This eliminates the need for DC-blocking capacitors or a midrail bias for the headphone jack ground return. Ground sense reduces output noise caused by ground return current.

The IC integrates jack detection allowing the detection of insertion and removal of accessories as well as button presses.

�� Maxim Integrated Products 60

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

I2C Slave Address

Configure the MAX98089 using the I2C control bus. The IC uses a slave address of 0x20 or 00100000 for write operations and 0x21 or 00100001 for read operations.

2

See the I

C Serial Interface section for a complete inter-

face description.

Table 1 lists all of the registers, their addresses, and power-on-reset states. Registers 0x00 to 0x03 and 0xFF are read-only while all of the other registers are read/ write. Write zeros to all unused bits in the register table when updating the register, unless otherwise noted.

Registers

Table 1. Register Map

REGISTER B7 B6 B5 B4 B3 B2 B1 B0 ADDRESS DEFAULT R/W PAGE

STATUS

Status CLD SLD ULK — — — JDET — 0x00 — R 117

Microphone AGC/NG

Jack Status JKSNS — — — — — — 0x02 — R 115

Battery Voltage

Interrupt Enable

MASTER CLOCK CONTROL

Master Clock 0 0 PSCLK 0 0 0 0 0x10 0x00 R/W 85

DAI1 CLOCK CONTROL

Clock Mode SR1 FREQ1 0x11 0x00 R/W 85, 86

Any Clock Control

DAI1 CONFIGURATION

Format MAS1 WCI1 BCI1 DLY1 0 TDM1 FSW1 WS1 0x14 0x00 R/W 80 Clock ADC_OSR1

I/O Configuration

Time-Division Multiplex

Filters MODE1 AVFLT1 DHF1 DVFLT1 0x18 0x00 R/W 90

DAI2 CLOCK CONTROL

Clock Mode SR2 0 0 0 0 0x19 0x00 R/W 85

Any Clock Control

DAI2 CONFIGURATION

Format MAS2 WCI2 BCI2 DLY2 0 TDM2 FSW2 WS2 0x1C 0x00 R/W 80

Clock 0 0

I/O Configuration

— — — VBAT 0x03 — R/W 116

ICLD ISLD IULK 0 0 0 IJDET 0 0x0F 0x00 R/W 117

PLL1 NI1[14:8] 0x12 0x00 R/W 86

PLL2 NI2[14:8] 0x1A 0x00 R/W 86

NG AGC 0x01 — R 74

NI1[7:1] NI1[0] 0x13 0x00 R/W 86

DAC_ORS1

SEL1 LTEN1 LBEN1 DMONO1 HIZOFF1 SDOEN1 SDIEN1 0x16 0x00 R/W 81, 82

SLOTL1 SLOTR1 SLOTDLY1 0x17 0x00 R/W 82

DAC_ ORS2

SEL2 0 LBEN2 DMONO2 HIZOFF2 SDOEN2 SDIEN2 0x1E 0x00 R/W 81, 82

0 0 BSEL1 0x15 0x00 R/W 81

NI2[7:1] NI2[0] 0x1B 0x00 R/W 86

0 0 BSEL2 0x1D 0x00 R/W 81

�� Maxim Integrated Products 61

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 1. Register Map (continued)

REGISTER B7 B6 B5 B4 B3 B2 B1 B0 ADDRESS DEFAULT R/W PAGE

Time-Division Multiplex

Filters 0 0 0 0 DHF2 0 0 DCB2 0x20 0x00 R/W 96

SRC

Sample Rate Converter

MIXERS

DAC Mixer MIXDAL MIXDAR 0x22 0x00 R/W 96

Left ADC Mixer

Right ADC Mixer

Left Headphone Amplifier Mixer

Right Headphone Amplifier Mixer

Headphone Amplifier Mixer Control

Left Receiver Amplifier Mixer

Right Receiver Amplifier Mixer

Receiver Amplifier Mixer Control

Left Speaker Amplifier Mixer

Right Speaker Amplifier Mixer

Speaker Amplifier Mixer Control

SLOTL2 SLOTR2 SLOTDLY2 0x1F 0x00 R/W 82

0 0 0

0 0

LINE_

MODE

0 0 0 0 MIXSPR_GAIN MIXSPL_GAIN 0x2D 0x00 R/W 101

MIXHPR_

PATHSEL

0 0 0 MIXRECR_GAIN MIXRECL_GAIN 0x2A 0x00 R/W 98

SRMIX_

MODE

MIXHPL_

PATHSEL

SRMIX_

ENL

MIXADL 0x23 0x00 R/W 73

MIXADR 0x24 0x00 R/W 73

MIXHPL 0x25 0x00 R/W 110

MIXHPR 0x26 0x00 R/W 110

MIXHPR_GAIN MIXHPL_GAIN 0x27 0x00 R/W 110

MIXRECL 0x28 0x00 R/W 98

MIXRECR 0x29 0x00 R/W 98

MIXSPL 0x2B 0x00 R/W 101

MIXSPR 0x2C 0x00 R/W 101

SRMIX_

ENR

SRC_

ENL

SRC_

ENR

0x21 0x00 R/W 89

�� Maxim Integrated Products 62

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 1. Register Map (continued)

REGISTER B7 B6 B5 B4 B3 B2 B1 B0 ADDRESS DEFAULT R/W PAGE

LEVEL CONTROL

Sidetone DSTS 0 DVST 0x2E 0x00 R/W 78

DAI1 Playback Level

DAI2 Playback Level

Left ADC Level

Right ADC Level

Microphone 1 Input Level

Microphone 2 Input Level

INA Input Level

INB Input Level

Left Headphone

Amplifier Volume Control

Right Headphone Amplifier Volume Control

Left Receiver Amplifier Volume Control

Right Receiver Amplifier Volume Control

DV1M 0 DV1G DV1 0x2F 0x00 R/W 95

0 0 0 EQCLP1 DVEQ1 0x30 0x00 R/W 94

DV2M 0 0 0 DV2 0x31 0x00 R/W 95

0 0 0 EQCLP2 DVEQ2 0x32 0x00 R/W 94

0 0 AVLG AVL 0x33 0x00 R/W 77

0 0 AVRG AVR 0x34 0x00 R/W 77

0 PA1EN PGAM1 0x35 0x00 R/W 70

0 PA2EN PGAM2 0x36 0x00 R/W 70

0 INAEXT 0 0 0 PGAINA 0x37 0x00 R/W 72

0 INBEXT 0 0 0 PGAINB 0x38 0x00 R/W 72

HPLM 0 0 HPVOLL 0x39 0x00 R/W 111

HPRM 0 0 HPVOLR 0x3A 0x00 R/W 111

RECLM 0 0 RECVOLL 0x3B 0x00 R/W 99

RECRM 0 0 RECVOLR 0x3C 0x00 R/W 99

�� Maxim Integrated Products 63

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 1. Register Map (continued)

REGISTER B7 B6 B5 B4 B3 B2 B1 B0 ADDRESS DEFAULT R/W PAGE

Left Speaker Amplifier Volume Control

Right Speaker Amplifier Volume Control

MICROPHONE AGC

Configuration AGCSRC AGCRLS AGCATK AGCHLD 0x3F 0x00 R/W 74, 75 Threshold ANTH AGCTH 0x40 0x00 R/W 75

SPEAKER SIGNAL PROCESSING

Excursion Limiter Filter

Excursion Limiter Threshold

ALC ALCEN ALCRLS ALCMB ALCTH 0x43 0x00 R/W 93, 104 Power Limiter PWRTH 0 PWRK 0x44 0x00 R/W 105 Power Limiter PWRT2 PWRT1 0x45 0x00 R/W 106

Distortion

Limiter

CONFIGURATION

Audio Input INADIFF INBDIFF 0 0 0 0 0 0 0x47 0x00 R/W 72

Microphone MICCLK DIGMICL DIGMICR 0 Level Control VS2EN VSEN ZDEN 0 0 0 EQ2EN EQ1EN 0x49 0x00 R/W 94, 113 Bypass

Switches Jack

Detection

POWER MANAGEMENT

Input Enable INAEN INBEN 0 0 MBEN 0 ADLEN ADREN 0x4C 0x00 R/W 67 Output

Enable Top-Level

Bias Control

DAC Low Power Mode 1

DAC Low Power Mode 2

System Shutdown

SPLM 0 0 SPVOLL 0x3D 0x00 R/W 102

SPRM 0 0 SPVOLR 0x3E 0x00 R/W 102

0 DHPUCF 0 0 DHPLCF 0x41 0x00 R/W 104

0 0 0 0 0 DHPTH 0x42 0x00 R/W 104

THDCLP 0 0 0 THDT1 0x46 0x00 R/W 107

0 EXTMIC 0x48 0x00 R/W 70

INABYP 0 0 MIC2BYP 0 0 RECBYP SPKBYP 0x4A 0x00 R/W

JDETEN 0 0 0 0 0 JDEB 0x4B 0x00 R/W 115

HPLEN HPREN SPLEN SPREN RECLEN RECREN DALEN DAREN 0x4D 0x00 R/W 68

BGEN

SHDN VBATEN 0 0

SPREGEN

0 0 0 0

VCMEN BIASEN 0 0 0 JDWK 0x4E 0xF0 R/W 68

DAI2_DAC_LP DAI1_DAC_LP 0x4F 0x00 R/W 87

DAC2_IP_

DITH_EN

PERFMODE HPPLYBACK

DAC1_IP_

DITH_EN

CGM2_ENCGM1_

EN

PWRSV8K

PWRSV 0x51 0x00 R/W

0x50 0x0F R/W 87

71,

112

67,

116

�� Maxim Integrated Products 64

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 1. Register Map (continued)

REGISTER B7 B6 B5 B4 B3 B2 B1 B0 ADDRESS DEFAULT R/W PAGE

DSP COEFFICIENTS

EQ Band 1 (DAI1/DAI2)

EQ Band 2

(DAI1/DAI2)

EQ Band 3

(DAI1/DAI2)

EQ Band 4 (DAI1/DAI2)

K_1[15:8] 0x52/0x84 0xXX R/W 93

K_1[7:0] 0x53/0x85 0xXX R/W

K1_1[15:8] 0x54/0x86 0xXX R/W

K1_1[7:0] 0x55/0x87 0xXX R/W

K2_1[15:8] 0x56/0x88 0xXX R/W

K2_1[7:0] 0x57/0x89 0xXX R/W

c1_1[15:8] 0x58/0x8A 0xXX R/W

c1_1[7:0] 0x59/0x8B 0xXX R/W

c2_1[15:8] 0x5A/0x8C 0xXX R/W

c2_1[7:0] 0x5B/0x8D 0xXX R/W

K_2[15:8] 0x5C/0x8E 0xXX R/W

K_2[7:0] 0x5D/0x8F 0xXX R/W

K1_2[15:8] 0x5E/0x90 0xXX R/W

K1_2[7:0] 0x5F/0x91 0xXX R/W

K2_2[15:8] 0x60/0x92 0xXX R/W

K2_2[7:0] 0x61/0x93 0xXX R/W

c1_2[15:8] 0x62/0x94 0xXX R/W

c1_2[7:0] 0x63/0x95 0xXX R/W

c2_2[15:8] 0x64/0x96 0xXX R/W

c2_2[7:0] 0x65/0x97 0xXX R/W

K_3[15:8] 0x66/0x98 0xXX R/W

K_3[7:0] 0x67/0x99 0xXX R/W

K1_3[15:8] 0x68/0x9A 0xXX R/W

K1_3[7:0] 0x69/0x9B 0xXX R/W

K2_3[15:8] 0x6A/0x9C 0xXX R/W

K2_3[7:0] 0x6B/0x9D 0xXX

c1_3[15:8] 0x6C/0x9E 0xXX R/W

c1_3[7:0] 0x6D/0x9F 0xXX R/W

c2_3[15:8] 0x6E/0xAE 0xXX R/W

c2_3[7:0] 0x6F/0xA1 0xXX R/W

K_4[15:8] 0x70/0xA2 0xXX R/W

K_4[7:0] 0x71/0xA3 0xXX R/W

K1_4[15:8] 0x72/0xA4 0xXX R/W

K1_4[7:0] 0x73/0xA5 0xXX R/W

K2_4[15:8] 0x74/0xA6 0xXX R/W

K2_4[7:0] 0x75/0xA7 0xXX R/W

c1_4[15:8] 0x76/0xA8 0xXX R/W

c1_4[7:0] 0x77/0xA9 0xXX R/W

c2_4[15:8] 0x78/0xAA 0xXX R/W

c2_4[7:0] 0x79/0xAB 0xXX R/W

R/W

93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93

�� Maxim Integrated Products 65

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 1. Register Map (continued)

REGISTER B7 B6 B5 B4 B3 B2 B1 B0 ADDRESS DEFAULT R/W PAGE

K_5[15:8] 0x7A/0xAC 0xXX R/W

K_5[7:0] 0x7B/0xAD 0xXX R/W

K1_5[15:8] 0x7C/0xAE 0xXX R/W

K1_5[7:0] 0x7D/0xAF 0xXX R/W

EQ Band 5 (DAI1/DAI2)

Excursion

Limiter

Biquad

(DAI1/DAI2)

REVISION ID

Rev ID REV 0xFF 0x40 R 118

K2_5[15:8] 0x7E/0xB0 0xXX R/W

K2_5[7:0] 0x7F/0xB1 0xXX R/W

c1_5[15:8] 0x80/0xB2 0xXX R/W

c1_5[7:0] 0x81/0xB3 0xXX R/W

c2_5[15:8] 0x82/0xB4 0xXX R/W

c2_5[7:0] 0x83/0xB5 0xXX R/W

a1[15:8] 0xB6/0xC0 0xXX R/W

a1[7:0] 0xB7/0xC1 0xXX R/W

a2[15:8] 0xB8/0xC2 0xXX R/W

a2[7:0] 0xB9/0xC3 0xXX R/W

b0[15:8] 0xBA/0xC4 0xXX R/W

b0[7:0] 0xBB/0xC5 0xXX R/W

b1[15:8] 0xBC/0xC6 0xXX R/W

b1[7:0] 0xBD/0xC7 0xXX R/W

b2[15:8] 0xBE/0xC8 0xXX R/W

b2[7:0] 0xBF/0xC9 0xXX R/W

93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93 93

�� Maxim Integrated Products 66

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Power Management

The IC includes comprehensive power management to allow the disabling of all unused circuits, minimizing supply current.

Table 2. Power Management Registers

REGISTER BIT NAME DESCRIPTION

Global Shutdown. Disables everything except the headset detection circuitry, which is

controlled separately. 0 = Device Shutdown 1 = Device Enabled

Performance Mode. Selects DAC to headphone playback performance mode. 0 = High performance playback mode. 1 = Low power playback mode.

Headphone Only Playback Mode. Configures System Bias Control register bits for low power playback when using DAC to headphone playback path only. When enabled, this bit overrides the System Bias Control register settings. When disabled, the System Bias Control register is used to enable system bias blocks. Set both HPPLYBCK and PERFMODE for lowest power consumption when using DAC to headphone playback path only. 0 = Disabled 1 = Enabled

8kHz Power Save Mode. PWRSV8K configures the ADC for reduced power consumption when f for more power savings. 0 = Normal, high-performance mode. 1 = Low power mode.

Power Save Mode. PWRSV configures the ADC for reduced power consumption for all sample rates. PWRSV can be used in conjunction with PWRSV8K for more power savings. 0 = Normal, high-performance mode. 1 = Low-power mode.

Line Input A Enable

0 = Disabled 1 = Enabled

Line Input B Enable

0 = Disabled 1 = Enabled

Microphone Bias Enable

0 = Disabled 1 = Enabled

Left ADC Enable

0 = Disabled 1 = Enabled

Right ADC Enable

0 = Disabled 1 = Enabled

= 8kHz. PWRSV8K can be used in conjunction with PWRSV when fS = 8kHz

S

0x51

0x4C

7

6 VBATEN See the Battery Measurement section.

3 PERFMODE

2 HPPLYBCK

1 PWRSV8K

0 PWRSV

7 INAEN

6 INBEN

3 MBEN

1 ADLEN

0 ADREN

SHDN

�� Maxim Integrated Products 67

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 2. Power Management Registers (continued)

REGISTER BIT NAME DESCRIPTION

Left Headphone Enable

7 HPLEN

6 HPREN

5 SPLEN

4 SPREN

0x4D

3 RECLEN

2 RECREN

1 DALEN

0 DAREN

7 BGEN

6 SPREGEN

0x4E

5 VCMEN

4 BIASEN

0 JDWK See the Jack Detection section.

0 = Disabled 1 = Enabled

Right Headphone Enable

0 = Disabled 1 = Enabled

Left Speaker Enable

0 = Disabled 1 = Enabled

Right Speaker Enable

0 = Disabled 1 = Enabled

Receiver/Left Line Output Enable. Use this bit to enable the differential receiver output or left line output. 0 = Disabled 1 = Enabled

Right Line Output Enable. Use this bit to enable the right line output. 0 = Disabled 1 = Enabled

Left DAC Enable

0 = Disabled 1 = Enabled

Right DAC Enable

0 = Disabled 1 = Enabled

Bandgap Enable. Must be enabled for proper operation of the 2.5V regulator and associated circuitry. 0 = Disabled 1 = Enabled

2.5V Regulator Enable. SPREGEN enables a 2.5V internal regulator required for the ADC, speaker and receiver/line out amplifier. The 2.5V regulator is powered by SPKLVDD. 0 = Disabled 1 = Enabled

Common-Mode Voltage Resistor String Enable. VCMEN enables the common mode voltage for the input and output amplifiers in the codec. 0 = Disabled 1 = Enabled

Chip Bias Enable. BIASEN needs to be set for the codec amplifiers to be enabled. 0 = Disabled 1 = Enabled

MAX98089

�� Maxim Integrated Products 68

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Microphone Inputs

The device includes three differential microphone inputs and a low-noise microphone bias for powering the microphones (Figure 6). One microphone input can also be configured as a digital microphone input accepting signals from up to two digital microphones. Any two microphones, analog or digital, can be recorded simultaneously.

In the typical application, one microphone input is used for the handset microphone and the other is used as an accessory microphone. In systems using a background noise microphone, INA can be retasked as another microphone input.

In systems where the codec is not the only device recording microphone signals, connect microphones to

MCLK

MICBIAS

MIC1P/

DIGMICDATA

MIC1N/

DIGMICCLK

MBEN

MIC2BYP

REG

CLOCK

CONTROL

EXTMIC PA1EN:

0/20/30dB

MIC2P/MIC2N and EXTMICP/EXTMICN. MIC1P/MIC1N then become outputs that route the microphone signals to an external device as needed. Two devices can then record microphone signals without needing external analog switches.

Analog microphone signals are amplified by two stages of gain and then routed to the ADCs. The first stage offers selectable 0dB, 20dB, or 30dB settings. The second stage is a programmable-gain amplifier (PGA) adjustable from 0dB to 20dB in 1dB steps. To maximize the signalto-noise ratio, use the gain in the first stage whenever possible. Zero-crossing detection is included on the PGA to minimize zipper noise while making gain changes.

PGAM1: +20dB TO 0dB

AGC CONTROL

MIC2P

MIC2N

INABYP

INA1/EXTMICP

INA2/EXTMICN

Figure 6. Microphone Input Block Diagram

�� Maxim Integrated Products 69

EXTMIC PA2EN:

0/20/30dB

PGAINA: +20dB TO -6dB

PGAM1: +20dB TO 0dB

PGAINA: +20dB TO -6dB

INADIFF

MIX

MIXADL

MIX

MIXADR

ADLEN

ADCL

ADCR

ADREN

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 3. Microphone Input Registers

REGISTER BIT NAME DESCRIPTION

MIC1/MIC2 Preamplifier Gain

0x35/0x36

0x48

6

PA1EN/PA2EN

5

4

3

2

PGAM1/PGAM2

1

0

7

MICCLK

6

5 DIGMICL

4 DIGMICR

1

EXTMIC

0

Course microphone gain adjustment. 00 = Preamplifier disabled 01 = 0dB 10 = 20dB 11 = 30dB

MIC1/MIC2 PGA

Fine microphone gain adjustment.

VALUE GAIN (dB) VALUE GAIN (dB)

0x00 +20 0x0B +9 0x01 +19 0x0C +8 0x02 +18 0x0D +7 0x03 +17 0x0E +6 0x04 +16 0x0F +5 0x05 +15 0x10 +4 0x06 +14 0x11 +3 0x07 +13 0x12 +2 0x08 +12 0x13 +1 0x09 +11 0x14 to 0x1F 0

0x0A +10

Digital Microphone Clock Frequency

Select a frequency that is within the digital microphone’s clock frequency range. Set OSR1 = 1 when using a digital microphone. 00 = PCLK/8 01 = PCLK/6 10 = 64 x LRCLK 11 = Reserved

Left Digital Microphone Enable

Set PA1EN = 00 for proper operation. 0 = Disabled 1 = Enabled

Right Digital Microphone Enable

Set PA1EN = 00 for proper operation. 0 = Disabled 1 = Enabled

External Microphone Connection

Routes INA_/EXTMIC_ to the microphone preamplifiers. Set INAEN = 0 when using INA_/EXTMIC_ as a microphone input. 00 = Disabled 01 = MIC1 input 10 = MIC2 input 11 = Reserved

MAX98089

�� Maxim Integrated Products 70

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 3. Microphone Input Registers (continued)

REGISTER BIT NAME DESCRIPTION

INA�/EXTMIC� to MIC1� Bypass Switch

7 INABYP

4 MIC2BYP

0x4A

1 RECBYP

0 SPKBYP

0 = Disabled 1 = Enabled

MIC1� to MIC2� Bypass Switch

0 = Disabled 1 = Enabled

See the Output Bypass Switches section.

MAX98089

Line Inputs

The device includes two sets of line inputs (Figure 7). Each set can be configured as a stereo single-ended input or as a mono differential input. Each input includes adjustable gain to match a wide range of input signal levels. If a custom gain is needed, the external gain mode provides a trimmed feedback resistor. Set the gain

INABYP

PGAINA:

INA1/

EXTMICP

INA2/

EXTMICN

INB1

INB2

+20dB TO -6dB

PGAINA: +20dB TO -6dB

PGAINB: +20dB TO -6dB

INADIFF

INBDIFF

by choosing the appropriate input resistor and using the following formula:

AV

= 20 x log (20kI/RIN)

PGAIN

The external gain mode also allows summing multiple signals into a single input, by connecting multiple input resistors as show in Figure 8, and/or inputting signals larger than 1V

by adjusting the ration of the 20kI/R

P-P

IN

less than 1.

LEFT

INPUT 1

LEFT

INPUT 2

RIGHT

INPUT 1

RIGHT

INPUT 2

INA1/EXTMICP

VCM

INA2/EXTMICN

VCM

20kI

1V

(max)

P-P

1V

(max)

P-P

Figure 7. Line Input Block Diagram

�� Maxim Integrated Products 71

Figure 8. Summing Multiple Input Signals into INA/INB

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 4. Line Input Registers

REGISTER BIT NAME DESCRIPTION

Line Input A/B External Gain

Switches out the internal input resistor and selects a trimmed 20kI feedback resistor. Use an external input resistor to set the gain of the line input. 0 = Disabled 1 = Enabled

Line Input A/B Internal Gain Settings

000 = +20dB 001 = +14dB 010 = +3dB 011 = 0dB 100 = -3dB 101 = -6dB 110 = -6dB 111 = -6dB

Line Input A Differential Enable

0 = Stereo single-ended input 1 = Mono differential input

Line Input B Differential Enable

0 = Stereo single-ended input 1 = Mono differential input

0x37/0x38

0x47

6 INAEXT/INBEXT

2

1

PGAINA/PGAINB

0

7 INADIFF

6 INBDIFF

MAX98089

ADC Input Mixers

The IC’s stereo ADC accepts input from the microphone amplifiers, line inputs amplifiers, and directly from the INA1 and INA2. The ADC mixer routes any combination of the eight audio inputs to the left and right ADCs (Figure 9).

PGAM1: +20dB TO 0dB

PA1EN: 0/20/30dB

PGAM2: +20dB TO 0dB

PA2EN: 0/20/30dB

PGAINA: +20dB TO -6dB

INADIFF

PGAINA: +20dB TO -6dB

+

PGAINB: +20dB TO -6dB

INBDIFF

PGAINB: +20dB TO -6dB

+

Figure 9. ADC Input Mixer Block Diagram

MIX

MIXADL

MIX

MIXADR

ADLEN

ADCL

ADCR

ADREN

�� Maxim Integrated Products 72

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 5. ADC Input Mixer Register

REGISTER BIT NAME DESCRIPTION

0x23/0x24

7

6

5

4

MIXADL/MIXADR

3

2

1

0

Left/Right ADC Input Mixer

Selects which analog inputs are recorded by the left/right ADC. 1xxxxxxx = MIC1 x1xxxxxx = MIC2 xx1xxxxx = INA1 pin direct xxx1xxxx = INA2 pin direct xxxx1xxx = INA1 xxxxx1xx = INA2 (INADIFF = 0) or INA2 - INA1 (INADIFF = 1) xxxxxx1x = INB1 xxxxxxx1 = INB2 (INBDIFF = 0) or INB2 - INB1 (INBDIFF = 1)

MAX98089

Record Path Signal Processing

The device’s record signal path includes both automatic gain control (AGC) for the microphone inputs and a digital noise gate at the output of the ADC (Figure 10).

Microphone AGC

The IC’s AGC monitors the signal level at the output of the ADC and then adjusts the MIC1 and MIC2 analog PGA settings automatically. When the signal level is below the predefined threshold, the gain is increased up to its maximum (20dB). If the signal exceeds the threshold, the gain is reduced to prevent the output signal level exceeding the threshold. When AGC is enabled, the microphone PGA is not user programmable. The AGC provides a more constant signal level and improves the available ADC dynamic range.

PA1EN: 0/20/30dB

PA2EN: 0/20/30dB

PGAM1: +20dB TO -6dB

PGAM2: +20dB TO 0dB

MIX

MIXADL

MIX

ADLEN

ADREN

ADCL

ADCR

AUTOMATIC

GAIN

CONTROL

AVLG: 0/6/

12/18dB AVL:0dB

TO -15dB

MODE1

SRMIX_

MODE

AVFLT

NOISE GATE

AUDIO/

VOICE

FILTERS

SAMPLE RATE

CONVERTER

AVRG: 0/6/ 12/18dB AVR:0dB TO -15dB

Noise Gate

Since the AGC increases the levels of all signals below a user-defined threshold, the noise floor is effectively increased by 20dB. To counteract this, the noise gate reduces the gain at low signal levels. Unlike typical noise gates that completely silence the output below a defined level, the noise gate in the IC applies downward expansion. The noise gate attenuates the output at a rate of 1dB for each 2dB the signal is below the threshold with a maximum attenuation of 12dB.

The noise gate can be used in conjunction with the AGC or on its own. When the AGC is enabled, the noise gate reduces the output level only when the AGC has set the gain to the maximum setting. Figure 11 shows the gain response resulting from using the AGC and noise gate.

AGC AND NOISE GATE

AMPLITUDE RESPONSE

0

-20

AGC AND NOISE GATE

-40

-60

-80

OUTPUT AMPLITUDE (dBFS)

-100

AGC ONLY

AGC AND NOISE

GATE DISABLED

NOISE GATE ONLY

MIXADR

-120

-120 0

INPUT AMPLITUDE (dBFS)

-20-40-60-80-100

Figure 10. Record Path Signal Processing Block Diagram Figure 11. AGC and Noise Gate Input vs. Output Gain

�� Maxim Integrated Products 73

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 6. Record Path Signal Processing Registers

REGISTER BIT NAME DESCRIPTION

Noise Gate Attenuation

Reports the current noise gate attenuation. 000 = 0dB 001 = 1dB 010 = 2dB 011 = 3dB to 5dB 100 = 6dB to 7dB 101 = 8dB to 9dB 110 = 10dB to 11dB 111 = 12dB

AGC Gain

Reports the current AGC gain setting.

VALUE GAIN (dB) VALUE GAIN (dB)

0x00 +20 0x0B +9 0x01 +19 0x0C +8 0x02 +18 0x0D +7 0x03 +17 0x0E +6 0x04 +16 0x0F +5 0x05 +15 0x10 +4

0x06 +14 0x11 +3 0x07 +13 0x12 +2 0x08 +12 0x13 +1 0x09 +11 0x14 to 0x1F 0

0x0A +10

AGC/Noise Gate Signal Source

Determines which ADC channel the AGC and noise gates analyze. Gain is adjusted on both channels regardless of the AGCSRC setting. 0 = Left ADC output 1 = Maximum of either the left or right ADC output

AGC Release Time

Defined as the duration from start to finish of gain increase in the region shown in Figure

12. 000 = 78ms 001 = 156ms 010 = 312ms 011 = 625ms 100 = 1.25s 101 = 2.5s 110 = 5s 111 = 10s

0x01

0x3F

7

6

5

4

3

2

1

0

7 AGCSRC

6

5

4

NG

AGC

AGCRLS

MAX98089

�� Maxim Integrated Products 74

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 6. Record Path Signal Processing Registers (continued)

REGISTER BIT NAME DESCRIPTION

AGC Attack Time

3

AGCATK

2

0x3F

1

AGCHLD

0

7

6

ANTH

5

4

0x40

3

2

AGCTH

1

0

Defined as the time required to reduce gain by 63% of the total gain reduction (one time constant of the exponential response). Attack times are longer for low AGC threshold levels. See Figure 12 for details. 00 = 2ms 01 = 7.2ms 10 = 31ms 11 = 123ms

AGC Hold Time

The delay before the AGC release begins. The hold time counter starts whenever the signal drops below the AGC threshold and is reset by any signal that exceeds the threshold. Set AGCHLD to enable the AGC circuit. See Figure 12 for details. 00 = AGC disabled 01 = 50ms 10 = 100ms 11 = 400ms

Noise Gate Threshold

Gain is reduced for signals below the threshold to quiet noise. The thresholds are relative to the ADC’s full-scale output voltage.

VALUE

0x0 Noise gate disabled 0x8 -45 0x1 Reserved 0x9 -41 0x2 Reserved 0xA -38 0x3 -64 0xB -34 0x4 -62 0xC -30 0x5 -58 0xD -27 0x6 -53 0xE -22 0x7 -50 0xF -16

AGC Threshold

Gain is reduced when signals exceed the threshold to prevent clipping. The thresholds are relative to the ADC’s full-scale voltage.

VALUE

0x0 -3 0x8 -11 0x1 -4 0x9 -12 0x2 -5 0xA -13 0x3 -6 0xB -14 0x4 -7 0xC -15 0x5 -8 0xD -16 0x6 -9 0xE -17 0x7 -10 0xF -18

THRESHOLD

(dBFS)

THRESHOLD

(dBFS)

VALUE

MAX98089

THRESHOLD

(dBFS)

THRESHOLD

(dBFS)

�� Maxim Integrated Products 75

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Figure 12. AGC Timing

ATTACK TIME

HOLD TIME RELEASE TIME

The IC includes separate digital level control for the left and right ADC outputs (Figure 13). To optimize dynamic range, use analog gain to adjust the signal level and set

NOISE GATE

ADLEN

ADCL

AUTOMATIC

GAIN

CONTROL

MODE1

AVFLT

AVLG: 0/6/

12/18dB

AVL:0dB

TO -15dB

SRMIX_

MODE

AUDIO/

VOICE

FILTERS

AVRG: 0/6/ 12/18dB AVR:0dB TO -15dB

SAMPLE RATE

CONVERTER

ADC Record Level Control

ADCR

ADREN

Figure 13. ADC Record Level Control Block Diagram

�� Maxim Integrated Products 76

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 7. ADC Record Level Control Register

REGISTER BIT NAME DESCRIPTION

Left/Right ADC Gain

00 = 0dB 01 = 6dB 10 = 12dB 11 = 18dB

Left/Right ADC Level

VALUE GAIN (dB) VALUE GAIN (dB)

0x0 +3 0x8 -5 0x1 +2 0x9 -6 0x2 +1 0xA -7 0x3 0 0xB -8 0x4 -1 0xC -9 0x5 -2 0xD -10 0x6 -3 0xE -11 0x7 -4 0xF -12

0x33/0x34

5

4

3

2

1

0

AVLG/AVRG

AVL/AVR

MAX98089

the digital level control to 0dB whenever possible. Digital level control is primarily used when adjusting the record level for digital microphones.

Sidetone

DVST: 0dB TO -60dB

ADLEN

ADREN

ADCL

ADCR

AUTOMATIC

GAIN

CONTROL

SIDETONE

AVLG: 0/6/

12/18dB

AVL:0dB

TO -15dB

SRMIX_

MODE1

AVFLT

MODE

DSTS

NOISE GATE

AUDIO/

VOICE

FILTERS

SAMPLE RATE

CONVERTER

MIX

AVRG: 0/6/ 12/18dB AVR:0dB TO -15dB

Enable sidetone during full-duplex operation to add a low-level copy of the recorded audio signal to the playback audio signal (Figure 14). Sidetone is commonly used in telephony to allow the speaker to hear himself speak, providing a more natural user experience. The

DV1G: 0/6/12/18dB

+

MULTI BAND ALC

DVEQ1: 0dB TO -15dB

5-BAND

PARAMETRIC

EQ

EQ1EN EQ2EN

EXCURSION LIMITER

5-BAND

PARAMETRIC

EQ

DV2: 0dB TO -15dB

DV1: 0dB TO -15dB

DVEQ2: 0dB TO -15dB

DCB2

AUDIO/

FILTERS

AUDIO/

VOICE

FILTERS

MODE1 DVFLT

MIX

MIXDAL

MIX

MIXDAR

DACL

DALEN

DACR

DAREN

Figure 14. Sidetone Block Diagram

�� Maxim Integrated Products 77

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 8. Sidetone Register

REGISTER BIT NAME DESCRIPTION

Sidetone Source

Selects which ADC output is fed back as sidetone. When mixing the left and right ADC outputs, each is attenuated by 6dB to prevent full-scale signals from clipping. 00 = Sidetone disabled 01 = Left ADC 10 = Right ADC 11 = Left + Right ADC

Sidetone Level

Adjusts the sidetone signal level. All levels are referenced to the ADC’s full-scale output.

VALUE LEVEL (dB) VALUE LEVEL (dB)

0x00 Sidetone disabled 0x10 -30.5 0x01 -0.5 0x11 -32.5 0x02 -2.5 0x12 -34.5 0x03 -4.5 0x13 -36.5 0x04 -6.5 0x14 -38.5 0x05 -8.5 0x15 -40.5 0x06 -10.5 0x16 -42.5 0x07 -12.5 0x17 -44.5 0x08 -14.5 0x18 -46.5 0x09 -16.5 0x19 -48.5 0x0A -18.5 0x1A -50.5

0x0B -20.5 0x1B -52.5 0x0C -22.5 0x1C -54.5 0x0D -24.5 0x1D -56.6

0x0E -26.5 0x1E -58.5

0x0F -28.5 0x1F -60.5

0x2E

7

DSTS

6

4

3

2

1

0

DVST

MAX98089

IC implements sidetone digitally. Doing so helps prevent unwanted feedback into the playback signal path and better matches the playback audio signal.

Digital Audio Interfaces

The IC includes two separate playback signal paths and one record signal path. Digital audio interface 1 (DAI1) is used to transmit the recorded stereo audio signal and receive a stereo audio signal for playback. Digital audio interface 2 (DAI2) is used to receive a second stereo audio signal. Use DAI1 for all full-duplex operations and for all voice signals. Use DAI2 for music and to mix two playback audio signals. The digital audio interfaces are separate from the audio ports to enable either interface to communicate with any external device connected to either audio port.

�� Maxim Integrated Products 78

Each audio interface can be configured in a variety of for-

2

mats including left justified, I

S, PCM, and time division multiplexed (TDM). TDM mode supports up to 4 mono audio slots in each frame. The IC can use up to 2 mono slots per interface, leaving the remaining two slots available for another device. Table 9 shows how to configure the device for common digital audio formats. Figures 16 and 17 show examples of common audio formats. By default, SDOUTS1 and SDOUTS2 are set high impedance when the IC is not outputting data to facilitate sharing the bus. Configure the interface in TDM mode using only slot 1 to transmit and receive mono PCM voice data.

The IC’s digital audio interfaces support both ADC to DAC loop-through and digital loopback. Loop-through allows the signal converted by the ADC to be routed to the DAC for playback. The signal is routed from the record path to

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

the playback path in the digital audio interface to allow the IC’s full complement of digital signal processing to be used. Loopback allows digital data input to either SDINS1 or SDINS2 to be routed from one interface to the other for output on SDOUTS2 or SDOUTS1. Both inter-

BCLKS1

LRCLKS1 SDOUTS1 SDINS1 DVDDS1 BCLKS2 LRCLKS2 SDOUTS2 SDINS2 DVDDS2

SEL1 SEL2

SDIN1

HIZOFF1 SDOEN1

DATA

INPUT

DAI1

MAS1

BCLK1

BIT

CLOCK

LRCLK1

FRAME CLOCK

SDOUT1

MAS1

DATA

OUTPUT

faces must be configured for the same sample rate, but the interface format need not be the same. This allows the IC to route audio data from one device to another, converting the data format as needed. Figure 15 shows the available digital signal routing options.

BCLK2

DAI2

SDIEN1 SDIEN2

MAS2

BIT

CLOCK

LRCLK2

FRAME CLOCK

SDOUT2

MAS2

DATA

OUTPUT

SDIN2

HIZOFF2

SDOEN2

DATA

INPUT

LBEN1

LBEN2

MUX

+

LTEN1

DAI1

RECORD PATH

Figure 15. Digital Audio Signal Routing

Table 9. Common Digital Audio Formats

MODE WCI1/WCI2 BCI1/BCI2 DLY1/DLY2 TDM1/TDM2 SLOTL1/SLOTL2 SLOTR1/SLOTR2

Left Justified 1 0 0 0 X X

2

S 0 0 1 0 X X

I PCM X 1 X 1 0 0 TDM X 1 X 1 Set as desired

X = Don’t care.

�� Maxim Integrated Products 79

DAI1

PLAYBACK PATH

DAI2

PLAYBACK PATH

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 10. Digital Audio Interface Registers

REGISTER BIT NAME DESCRIPTION

DAI1/DAI2 Master Mode

In master mode, DAI1/DAI2 outputs LRCLK and BCLK. In slave mode, DAI1/DAI2 ac-

7 MAS1/MAS2

6 WCI1/WCI2

5 BCI1/BCI2

0x14/0x1C

4 DLY1/DLY2

2 TDM1/TDM2

1 FSW1/FSW2

0 WS1/WS2

cept LRCLK and BCLK as inputs. 0 = Slave mode 1 = Master mode

DAI1/DAI2 Word Clock Invert

TDM1/TDM2 = 0: 0 = Left-channel data is transmitted while LRCLK is low. 1 = Right-channel data is transmitted while LRCLK is low. TDM1/TDM2 = 1: Always set WCI = 0.

DAI1/DAI2 Bit Clock Invert

BCI1/BCI2 must be set to 1 when TDM1/TDM2 = 1. 0 = SDIN is accepted on the rising edge of BCLK.

SDOUT is valid on the rising edge of BCLK.

1 = SDIN is accepted on the falling edge of BCLK.

SDOUT is valid on the falling edge of BCLK. Master Mode: 0 = LRCLK transitions on the falling edge of BCLK. 1 = LRCLK transitions on the rising edge of BCLK.

DAI1/DAI2 Data Delay

DLY1/DLY2 has no effect when TDM1/TDM2 = 1. 0 = The most significant data bit is clocked on the first active BCLK edge after an

LRCLK transition.

1 = The most significant data bit is clocked on the second active BCLK edge after an

LRCLK transition.

DAI1/DAI2 Time-Division Multiplex Mode (TDM Mode)

Set TDM1/TDM2 when communicating with devices that use a frame synchronization pulse on LRCLK instead of a square wave. 0 = Disabled 1 = Enabled (BCI1/BCI2 must be set to 1)

DAI1/DAI2 Wide Frame Sync Pulse

Increases the width of the frame sync pulse to the full data width when TDM1/TDM2 =

1. FSW1/FSW2 has no effect when TDM1/TDM2 = 0. 0 = Disabled 1 = Enabled

DAI1/DAI2 Audio Data Bit Depth

Determines the maximum bit depth of audio being transmitted and received. Data is always 16 bit when TDM1/TMD2 = 0. 0 = 16 bits 1 = 24 bits

MAX98089

�� Maxim Integrated Products 80

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 10. Digital Audio Interface Registers (continued)

REGISTER BIT NAME DESCRIPTION

ADC Oversampling Ratio

Use the higher setting for maximum performance. Use the lower setting for reduced power consumption at the expense of performance. 00 = 96x 01 = 64x 10 = Reserved 11 = Reserved

DAC Oversample Clock (Select PCLK/2 for higher performance. Select PCLK/4 for lower power consumption.)

1 = DAC input clock = PCLK/2 0 = DAC input clock = PCLK/4

DAI1/DAI2 BCLK Output Frequency

When operating in master mode, BSEL1/BSEL2 set the frequency of BCLK. When operating in slave mode, BSEL1/BSEL2 have no effect. Select the lowest BCLK frequency that clocks all data input to the DAC and output by the ADC. 000 = BCLK disabled 001 = 64 x LRCLK 010 = 48 x LRCLK 011 = 128 x LRCLK (invalid for DHF1/DHF2 = 1) 100 = PCLK/2 101 = PCLK/4 110 = PCLK/8 111 = PCLK/16

DAI1/DAI2 Audio Port Selector

Selects which port is used by DAI1/DAI2. 00 = None 01 = Port S1 10 = Port S2 11 = Reserved

DAI1 Digital Loopthrough

Connects the output of the record signal path to the input of the playback path. Data input to DAI1 from an external device is mixed with the recorded audio signal. 0 = Disabled 1 = Enabled

DAI1/DAI2 Digital Audio Interface Loopback

LBEN1 routes the digital audio input to DAI1 back out on DAI2. LBEN2 routes the digital audio input to DAI2 back out on DAI1. Selecting LBEN2 disables the ADC output data. 0 = Disabled 1 = Enabled

0x15/0x1D

0x16/0x1E

7

OSR1

6

DAC_OSR1/

5

DAC_OSR2

2

1

0

7

6

5 LTEN1

4

BSEL1/

BSEL2

SEL1/SEL2

LBEN1/

LBEN2

MAX98089

DAI1/DAI2 DAC Mono Mix

Mixes the left and right digital input to mono and routes the combined signal to the left

3

�� Maxim Integrated Products 81

DMONO1/

DMONO2

and right playback paths. The left and right input data is attenuated by 6dB prior to the mono mix. 0 = Disabled 1 = Enabled

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 10. Digital Audio Interface Registers (continued)

REGISTER BIT NAME DESCRIPTION

Disable DA1/DAI2 Output High-Impedance Mode

Normally SDOUT is set high impedance between data words. Set HIZOFF1/HIZOFF2 to force a level on SDOUT at all times. 0 = Disabled 1 = Enabled

DAI1/DAI2 Record Path Output Enable

DAI2 outputs data only if LBEN1 = 1. 0 = Disabled 1 = Enabled

DAI1/DAI2 Playback Path Input Enable

0 = Disabled 1 = Enabled

TDM Left Time Slot

Selects which of the four slots is used for left data on DAI1/DAI2. If the same slot is selected for left and right audio, left audio is placed in the slot. 00 = Slot 1 01 = Slot 2 10 = Slot 3 11 = Slot 4

TDM Right Time Slot

Selects which of the four slots is used for right data on DAI1/DAI2. If the same slot is selected for left and right audio, left audio is placed in the slot. 00 = Slot 1 01 = Slot 2 10 = Slot 3 11 = Slot 4

TDM Slot Delay

Adds 1 BCLK cycle delay to the data in the specified TDM slot. 1xxx = Slot 4 delayed x1xx = Slot 3 delayed xx1x = Slot 2 delayed xxx1 = Slot 1 delayed

0x16/0x1E

0x17/0x1F

2

1

0

7

6

5

4

3

2

1

0

HIZOFF1/

HIZOFF2

SDOEN1/

SDOEN2

SDIEN1/

SDIEN2

SLOTL1/

SLOTL2

SLOTR1/

SLOTR2

SLOTDLY1/

SLOTDLY2

MAX98089

�� Maxim Integrated Products 82

Low-Power, Stereo Audio Codec

with FlexSound Technology

WCI_ = 0, BCI_ = 0, DLY_ = 0, TDM_ = 0, FSW_ = 0, WS_ = 0, HIZOFF_ = 1, SLOTL_ = 0, SLOTR_ = 0

MAX98089

LRCLK

SDOUT

BCLK

SDIN

LRCLK

SDOUT

BCLK

SDIN

LRCLK

SDOUT

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

WCI_ = 1, BCI_ = 0, DLY_ = 0, TDM_ = 0, FSW_ = 0, WS_ = 0, HIZOFF_ = 1, SLOTL_ = 0, SLOTR_ = 0

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

WCI_ = 0, BCI_ = 1, DLY_ = 0, TDM_ = 0, FSW_ = 0, WS_ = 0, HIZOFF_ = 1, SL

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

LEFT

OTL_ =

RIGHT

0, SLOTR_ = 0

RIGHT

BCLK

SDIN

LRCLK

SDOUT

BCLK

SDIN

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

WCI_ = 0, BCI_ = 0, DLY_ = 1, TDM_ = 0, FSW_ = 0, WS_ = 0, HIZOFF_ = 1, SLOTL_ = 0, SLOTR_ = 0

LEFT

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Figure 16. Non-TDM Data Format Examples

�� Maxim Integrated Products 83

RIGHT

Low-Power, Stereo Audio Codec

WCI_ = 0, BCI_ = 1, DLY_ = 0, TDM_ = 1, FSW_ = 0, WS_ = 0, HIZOFF_ = 0, SLOTL_ = 0, SLOTR_ = 1

LRCLK

MAX98089

with FlexSound Technology

HI-Z

SDOUT

BCLK

SDIN

LRCLK

SDOUT

BCLK

SDIN

LRCLK

SDOUT

BCLK

SDIN

L15 L14 L13 L12 L11 L10 L9 L8 L7 L6 L5 L4 L3 L2 L1 L0 R15 R14 R13 R12 R11 R10 R9 R8 R7 R6 R5 R4 R3 R2 R1 R0

WCI_ = 0, BCI_ = 1, DLY_ = 0, TDM_ = 1, FSW_ = 1, WS_ = 0, HIZOFF_ = 0, SLOTL_ = 0, SLOTR_ = 1

HI-Z

L15 L14 L13 L12 L11 L10 L9 L8 L7 L6 L5 L4 L3 L2 L1 L0 R15 R14 R13 R12 R11 R10 R9 R8 R7 R6 R5 R4 R3 R2 R1 R0

WCI_ = 0, BCI_ = 1, DLY_ = 0, TDM_ = 1, FSW_ = 0, WS_ = 0, HIZOFF_ = 1, SLOTL_ = 0, SLOTR_ = 1

L15 L14 L13 L12 L11 L10 L9 L8 L7 L6 L5 L4 L3 L2 L1 L0 R15 R14 R13 R12 R11 R10 R9 R8 R7 R6 R5 R4 R3 R2 R1 R0

HI-Z

WCI_ = 0, BCI_ = 1, DLY_ = 0, TDM_ = 1, FSW_ = 0, WS_ = 0, HIZOFF_ = 0, SLOTL_ = 2, SLOTR_ = 3

LRCLK

SDOUT

BCLK

SDIN

LRCLK

SDOUT

BCLK

SDIN

HI-Z

32 CYCLES

WCI_ = 0, BCI_ = 1, DLY_ = 0, TDM_ = 1, FSW_ = 0, WS_ = 0, HIZOFF_ = 0, SLOTL_ = 0, SLOTR_ = 1

HI-Z

L L L L L L L L R R R R R R R R

HI-Z

L L L L L L L L R R R R R R R R

L15 L14 L13 L12 L11 L10 L9 L8 L7 L6 L5 L4 L3 L2 L1 L0 R15 R14 R13 R12 R11 R10 R9 R8 R7 R6 R5 R4 R3 R2 R1 R0

16 CYCLES 16 CYCLES 16 CYCLES 16 CYCLES

Figure 17. TDM Mode Data Format Examples

�� Maxim Integrated Products 84

HI-Z

Low-Power, Stereo Audio Codec

with FlexSound Technology

Clock Control

The digital signal paths in the IC require a master clock (MCLK) between 10MHz and 60MHz to function. The MAX98089 requires an internal clock between 10MHz and 20MHz. A prescaler divides MCLK by 1, 2, or 4 to create the internal clock (PCLK). PCLK is used to clock all portions of the IC.

The MAX98089 includes two digital audio signal paths, both capable of supporting any sample rate from 8kHz to 96kHz. Each path is independently configured to allow different sample rates. To accommodate a wide range of system architectures, four main clocking modes are supported:

PLL Mode: When operating in slave mode, enable the

U

PLL to lock onto any LRCLK input. This mode requires the least configuration, but provides the lowest performance. Use this mode to simplify initial setup or when normal mode and exact integer mode cannot be used.

MAX98089

Normal Mode: This mode uses a 15-bit clock divider

U

to set the sample rate relative to PCLK. This allows high flexibility in both the PCLK and LRCLK frequencies and can be used in either master or slave mode.

Exact Integer Mode (DAI1 only): In both master and

U

slave modes, common MCLK frequencies (12MHz, 13MHz, 16MHz, and 19.2MHz) can be programmed to operate in exact integer mode for both 8kHz and 16kHz sample rates. In these modes, the MCLK and LRCLK rates are selected by using the FREQ1 bits instead of the NI, and PLL control bits.

DAC Low-Power Mode: This mode bypasses the

U

PLL for reduce power consumptions and uses fixed counters to generate the clocks. The DAI__DAC_LP bits override the other clock settings.

Table 11. Clock Control Registers

REGISTER BIT NAME DESCRIPTION

MCLK Prescaler

0x10

0x11/0x19

5

PSCLK

4

7

6

SR1/SR2

5

4

Generates PCLK, which is used by all internal circuitry. 00 = PCLK disabled 01 = 10MHz P MCLK P 20MHz (PCLK = MCLK) 10 = 20MHz P MCLK P 40MHz (PCLK = MCLK/2) 11 = 40MHz P MCLK P 60MHz (PCLK = MCLK/4)

DAI1/DAI2 Sample Rate

Used by the ALC to correctly set the dual-band crossover frequency and the excursion limiter to set the predefined corner frequencies.

VALUE

0x0 Reserved 0x8 48 0x1 8 0x9 88.2 0x2 11.025 0xA 96 0x3 16 0xB Reserved 0x4 22.05 0xC Reserved 0x5 24 0xD Reserved 0x6 32 0xE Reserved 0x7 44.1 0xF Reserved

SAMPLE RATE

(kHz)

VALUE

SAMPLE RATE

(kHz)

�� Maxim Integrated Products 85

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 11. Clock Control Registers (continued)

REGISTER BIT NAME DESCRIPTION

Exact Integer Mode

Overrides PLL1 and NI1 and configures a specific PCLK to LRCLK ratio.

0x11

0x12/0x1A

0x13/0x1B

3

2

1

7 PLL1/PLL2

6 5 4 3 2 1

7 6

4 3 2 1

0 NI1[0]/NI2[0]

FREQ1

NI1/

NI2

VALUE SAMPLE RATE VALUE SAMPLE RATE

0x0 Disabled 0x8

0x1 Reserved 0x9

0x2 Reserved 0xA

0x3 Reserved 0xB

0x4 Reserved 0xC

0x5 Reserved 0xD

0x6 Reserved 0xE

0x7 Reserved 0xF

PLL Mode Enable (Slave Mode Only)

PLL1/PLL2 enables a digital PLL that locks on to the externally supplied LRCLK frequency and automatically sets the LRCLK divider (NI1/NI2). 0 = Disabled 1 = Enabled

Normal Mode LRCLK Divider

When PLL1/PLL2 = 0, the frequency of LRCLK is determined by NI1/NI2. See Table 12 for common NI values.

SAMPLE RATE DHF1/DHF2 NI1/NI2 FORMULA

8kHz P LRCLK P 48kHz

48kHz < LRCLK P 96kHz

= LRCLK frequency

f

LRCLK

f

= Prescaled MCLK frequency (PCLK)

PCLK

Rapid Lock Mode

Program NI1/NI2 to the nearest valid ratio and set NI1[0]/NI2[0] when PLL1/PLL2 = 1 to enable rapid lock mode. Normally, the PLL automatically calculates and dynamically adjusts NI1/NI2. When rapid lock mode is properly configured, the PLL starting point is much closer to the correct value, thus speeding up lock time. Wait one LRCLK period after programming NI1/NI2 before setting PLL1/PLL2 = 1.

00

15

MAX98089

PCLK = 12MHz,

LRCLK = 8kHz

PCLK = 12MHz, LRCLK = 16kHz

PCLK = 13MHz,

LRCLK = 8kHz

PCLK = 13MHz, LRCLK = 16kHz

PCLK = 16MHz,

LRCLK = 8kHz

PCLK = 16MHz, LRCLK = 16kHz

PCLK = 19.2MHz,

LRCLK = 8kHz

PCLK = 19.2MHz,

LRCLK = 16kHz

65,536 x 96 x f

NIf=

65,536 x 48 x f

NIf=

LRCLK

PCLK

LRCLK

PCLK

�� Maxim Integrated Products 86

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 11. Clock Control Registers (continued)

REGISTER BIT NAME DESCRIPTION

DAI� DAC Low Power Select.

These bits setup the clocks to be generated from fixed counters that bypass the PLL for DAC low power mode.

VALUE SETTING

0x0

0x3

0x4

DAI2 DAC Input Dither Enable

DAC2DITHEN is recommended to be set when DAI2_DAC_LP = 0000. 0 = Disabled 1 = Enabled

DAI1 DAC Input Dither 1 Enable

DAC1DITHEN is recommended to be set when DAI1_DAC_LP = 0000. 0 = Disabled 1 = Enabled

DAI2 Clock Gen Module Enable

CGM1_EN has to be set along with CGM2_EN to enable the clock generation for the DAI2 DAC playback path. 0 = Disabled 1 = Enabled

PLL derived

clock

PCLK = 128

x LRCLK

PCLK = 192

x LRCLK

PCLK = 256

x LRCLK

PCLK = 384

x LRCLK

PCLK = 768

x LRCLK

PCLK = 1152

x LRCLK

PCLK = 1536

x LRCLK

FILTER

SELECT

— 0x8

Audio 96kHz 0x9 Reserved —

Audio 96kHz 0xA Reserved —

Audio 48kHz 0xB Reserved —

Audio 48kHz 0xC Reserved —

Voice 0xD Reserved —

Voice 0xE Reserved —

Voice 0xF Reserved —

0x4F

0x50

7

6

DAI2_DAC_LP

5 0x1

4 0x2

3

DAI1_DAC_LP

2 0x5

1 0x6

0 0x7

3 DAC2DITHEN

2 DAC1DITHEN

1 CGM2_EN

MAX98089

VALUE SETTING

PCLK = 2304

x LRCLK

FILTER

SELECT

Voice

DAI1/Device Clock Gen Module Enable

CGM1_EN enables the device clock generation, and needs to be set for DAC playback

0 CGM1_EN

�� Maxim Integrated Products 87

or ADC record. 0 = Disabled 1 = Enabled

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 12. Common NI1/NI2 Values

LRCLK (kHz)

PCLK (MHz)

8 11.025 12 16 22.05 24 32 44.1 48 64 88.2 96 10 11

11.2896 12

12.288 1000 13 16

16.9344

18.432 20

13A9 1B18 1D7E 2752 3631 3AFB 4EA5 6C61 75F7 4EA5 6C61 75F7 11E0 18A2 1ACF 23BF 3144 359F 477E 6287 6B3E 477E 6287 6B3E 116A

1800

1A1F 22D4

1062 1694 1893 20C5 2D29 3127 4189 5A51 624E 4189 5A51 624E

160D

1800 2000

0F20 14D8 16AF 1E3F 29AF 2D5F 3C7F 535F 5ABE 3C7F 535F 5ABE 0C4A 10EF 126F 1893 21DE 24DD 3127 43BD 49BA 3127 43BD 49BA 0B9C 0AAB 0EB3

1000

116A 1738

1000

09D5 0D8C 0EBF 13A9 1B18 1D7E 2752 3631 3AFB 2752 3631 3AFB

Note: Values in bold are exact integers that provide maximum full-scale performance.

Sample Rate Converter

The sample rate conversion circuit allows for both sample rate conversion and mixing of asynchronous audio data from DAI1 (SDIN1) and DAI2 (SDIN2). The resulting

DHF1/2 = 0 DHF1/2 = 1

3000

2C1A

2000

1555 1D66

343F 45A9

3000 4000

22D4 2E71

2000

2AAB 3ACD

audio can be output through DAI1 to either SDOUTS1 or SDOUTS2. The sample rate converter can be enabled on a per channel basis, allowing for one channel of DAI1 to output microphone data while the other channel is outputting sample rate converted data.

6000

5833

4000

MAX98089

687D 45A9

6000 4000

45A9 2E71

4000

2AAB 3ACD

6000

5833

4000

687D

6000

45A9

4000

AUTOMATIC

GAIN

CONTROL

ADLEN

ADCL

ADCR

ADREN

Figure 18. Sample Rate Converter

�� Maxim Integrated Products 88

SIDETONE

AVLG: 0/6/

12/18dB AVL:0dB

TO -15dB

SRMIX_

MODE1

AVFLT

MIX

DSTS

NOISE GATE

AUDIO/

VOICE

FILTERS

SAMPLE RATE

CONVERTER

DVST: 0dB TO -60dB

AVRG: 0/6/ 12/18dB AVR:0dB TO -15dB

DV1G: 0/6/12/18dB

+

MULTI BAND ALC

DVEQ1: 0dB TO -15dB

5-BAND

PARAMETRIC

EQ

EQ1EN EQ2EN

EXCURSION LIMITER

5-BAND

PARAMETRIC

EQ

DV2: 0dB TO -15dB

DV1: 0dB TO -15dB

DVEQ2: 0dB TO -15dB

DCB2

MODE1 DVFLT

AUDIO/

FILTERS

AUDIO/

VOICE

FILTERS

MIX

MIXDAL

MIX

MIXDAR

DACL

DALEN

DACR

DAREN

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 13. Sample Rate Converter Register

REGISTER BIT NAME DESCRIPTION

Sample Rate Mix Mode. Sets mixing configuration applied to the sample rate con-

4 SRMIX_MODE

3 SRMIX_ENL

0x21

2 SRMIX_ENR

1 SRC_ENL

0 SRC_ENR

verted channel(s). 0 = (DAI1 + DAI2) 1 = (DAI1 + DAI2)/2

Sample Rate Mix Enable. If enabled, mixes data on DAI1 and DAI2. If cleared, SCR data source is DAI2 only. 0 = SRC mix disable 1 = SRC mix enable

Sample Rate Converter Enable. Select if the SCR is enabled on a per channel basis. 0 = Sample rate converter disable 1 = Sample rate converter enable

MAX98089

Passband Filtering

Each digital signal path in the IC includes options for defining the path bandwidth (Figure 19). The playback and record paths connected to DAI1 support both voice and music filtering while the playback path connected to DAI2 supports music filtering only.

The voice IIR filters provide greater than 70dB stopband attenuation at frequencies above f

/2 to reduce aliasing.

S

Three selectable highpass filters eliminate unwanted lowfrequency signals.

DVST: 0dB TO -60dB

ADLEN

ADREN

ADCL

ADCR

AUTOMATIC

GAIN

CONTROL

SIDETONE

AVLG: 0/6/

12/18dB AVL:0dB

TO -15dB

SRMIX_

MODE1

AVFLT

MODE

DSTS

NOISE GATE

AUDIO/

VOICE

FILTERS

SAMPLE RATE

CONVERTER

MIX

AVRG: 0/6/ 12/18dB AVR:0dB TO -15dB

Use music mode when processing high-fidelity audio content. The music FIR filters reduce power consumption and are linear phase to maintain stereo imaging. An optional DC-blocking filter is available to eliminate unwanted DC offset.

In music mode, a second set of FIR filters are available to support sample rates greater than 50kHz. The filters can be independently selected for DAI1 and DAI2 and support both the playback and record audio paths.

DV1G: 0/6/12/18dB

+

MULTI BAND ALC

DVEQ1: 0dB TO -15dB

5-BAND

PARAMETRIC

EQ

EQ1EN EQ2EN

EXCURSION LIMITER

5-BAND

PARAMETRIC

EQ

DV2: 0dB TO -15dB

DV1: 0dB TO -15dB

DVEQ2: 0dB TO -15dB

DCB2

MODE1 DVFLT

AUDIO/

FILTERS

AUDIO/

VOICE

FILTERS

MIX

MIXDAL

MIX

MIXDAR

DACL

DALEN

DACR

DAREN

Figure 19. Digital Passband Filtering Block Diagram

�� Maxim Integrated Products 89

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 14. Passband Filtering Registers

REGISTER BIT NAME DESCRIPTION

DAI1 Passband Filtering Mode

0 = Voice filters 1 = Music filters (recommended for f

DAI1 ADC Highpass Filter Mode

MODE1 AVFLT1

0 See Table 15.

1

DAI1 High Sample Rate Mode

Selects the sample rate range. 0 = 8kHz P LRCLK P 48kHz 1 = 48kHz P LRCLK P 96kHz

DAI1 DAC Highpass Filter Mode

MODE1 DVFLT1

0 See Table 15.

DAI2 High Sample Rate Mode

Selects the sample rate range. 0 = 8kHz P LRCLK P 48kHz 1 = 48kHz < LRCLK P 96kHz

DAI2 DC Blocking Filter

Enables a DC-blocking filter on the DAI2 playback audio path. 0 = Disabled 1 = Enabled

> 24kHz)

S

0x18

0x20

7 MODE1

6 5

AVFLT1

4

3 DHF1

2

1

0 1

3 DHF2

0 DCB2

DVFLT1

MAX98089

Select a nonzero value to enable the DC- blocking filter.

Select a nonzero value to enable the DCblocking filter.

�� Maxim Integrated Products 90

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 15. Voice Highpass Filters

AVFTL/DVFLT VALUE INTENDED SAMPLE RATE FILTER RESPONSE

000 N/A Disabled

10

0

-10

-20

MAX98089

001/011 16kHz/8kHz

010/100 16kHz/8kHz

-30

AMPLITUDE (dB)

-40

-50

-60 0 1000

FREQUENCY (Hz)

10

0

-10

-20

-30

AMPLITUDE (dB)

-40

-50

-60 0 1000

FREQUENCY (Hz)

10

0

-10

800600400200

-20

101 8kHz to 48kHz

-30

AMPLITUDE (dB)

-40

-50

-60 0 1000

FREQUENCY (Hz)

110/111 N/A Reserved

�� Maxim Integrated Products 91

LRCLK = 48kHz

800600400200

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Playback Path Signal Processing

The IC playback signal path includes automatic level control (ALC) and a 5-band parametric equalizer (EQ) (Figure 20). The DAI1 and DAI2 playback paths include separate ALCs controlled by a single set of registers. Two completely separate parametric EQs are included for the DAI1 and DAI2 playback paths.

Automatic Level Control

The automatic level control (ALC) circuit ensures maximum signal amplitude without producing audible clipping. This is accomplished by a variable gain stage that works on a sample by sample basis to increase the gain up to 12dB. A look-ahead circuit determines if the next sample exceeds full scale and reduces the gain so that the sample is exactly full scale.

A programmable low signal threshold determines the minimum signal amplitude that is amplified. Select a threshold that prevents the amplification of background noise. When the signal level drops below the low signal threshold, the ALC reduces the gain to 0dB until the signal increases above the threshold. Figure 21 shows an example of ALC input vs. output curves.

The ALC can optionally be configured in dual-band mode. In this mode, the input signal is filtered into two bands with a 5kHz center frequency. Each band is routed through independent ALCs and then summed together. In multiband mode, both bands use the same parameters.

OUTPUT SIGNAL

(dBFS)

0

INPUT SIGNAL (dBFS)

OUTPUT SIGNAL

(dBFS)

0

LOW-LEVEL

THRESHOLD

ALC W ITH ALCTH ≠ 000

-12 0

DV1G: 0/6/12/18dB

+

MULTI BAND ALC

DVEQ1: 0dB TO -15dB

5-BAND

PARAMETRIC

EQ

EQ1EN EQ2EN

EXCURSION LIMITER

Figure 20. Playback Path Signal Processing Block Diagram

�� Maxim Integrated Products 92

5-BAND

PARAMETRIC

EQ

DV2: 0dB TO -15dB

DV1: 0dB TO -15dB

DVEQ2: 0dB TO -15dB

DCB2

MODE1 DVFLT

AUDIO/

FILTERS

AUDIO/

VOICE

FILTERS

MIX

MIXDAL

MIX

MIXDAR

DACL

DALEN

DACR

DAREN

OUTPUT SIGNAL

(dBFS)

0

LOW-LEVEL

THRESHOLD

LOW-LEVEL

THRESHOLD

-12 0

ALC W ITH ALCTH = 000

-12 0

ALC D ISABLED

Figure 21. ALC Input vs. Output Examples

INPUT SIGNAL (dBFS)

Low-Power, Stereo Audio Codec

with FlexSound Technology

Table 16. Automatic Level Control Registers

REGISTER BIT NAME DESCRIPTION

ALC Enable

Enables ALC on both the DAI1 and DAI2 playback paths. 0 = Disabled 1 = Enabled

ALC and Excursion Limiter Release Time

Sets the release time for both the ALC and Excursion Limiter. See the Excursion Limiter section for Excursion Limiter release times. ALC release time is defined as the time

required to adjust the gain from 12dB to 0dB.

VALUE ALC RELEASE TIME (s)

000 8 001 4 010 2 011 1 100 0.5 101 0.25 110 Reserved 111 Reserved

Multiband Enable

Enables dual-band processing with a 5kHz center frequency. SR1 and SR2 must be configured properly to achieve the correct center frequency for each playback path. 0 = Single-band ALC 1 = Dual-band ALC

Low Signal Threshold

Selects the minimum signal level to be boosted by the ALC. 000 = -JdB (low-signal threshold disabled) 001 = -12dB 010 = -18dB 011 = -24dB 100 = -30dB 101 = -36dB 110 = -42dB 111 = -48dB

0x43

7 ALCEN

6

5

4

3 ALCMB

2

1

0

ALCRLS

ALCTH

MAX98089

Parametric Equalizer

The parametric EQ contains five independent biquad filters with programmable gain, center frequency, and bandwidth. Each biquad filter has a gain range of Q12dB and a center frequency range from 20Hz to 20kHz. Use a filter Q less than that shown in Figure 22 to achieve ideal frequency responses. Setting a higher Q results in nonideal frequency response. The biquad filters are series connected, allowing a total gain of Q60dB.

�� Maxim Integrated Products 93

1000

fs = 8kHz

100

10

1

MAXIMUM RECOMMENDED FILTER Q

0.1 100 100,000

Figure 22. Maximum Recommended Filter Q vs. Frequency

CENTER FREQUENCY (Hz)

fs = 48kHz

fs = 96kHz

10,0001000

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Use the attenuator at the EQ’s input to avoid clipping the signal. The attenuator can be programmed for fixed attenuation or dynamic attenuation based on signal level. If the dynamic EQ clip detection is enabled, the signal

The MAX98089 EV kit software includes a graphical interface for generating the EQ coefficients. The coefficients are sample rate dependent and stored in registers 0x52

through 0xB5. level from the EQ is fed back to the attenuator circuit to determine the amount of gain reduction necessary to avoid clipping.

Table 17. EQ Registers

REGISTER BIT NAME DESCRIPTION

DAI1/DAI2 EQ Clip Detection

Automatically controls the EQ attenuator to prevent clipping in the EQ. 0 = Enabled 1 = Disabled

DAI1/DAI2 EQ Attenuator

Provides attenuation to prevent clipping in the EQ when full-scale signals are boosted. DVEQ1/DVEQ2 operates only when EQ1EN/EQ2EN = 1 and EQCLP1/EQ- CLP2 = 1.

VALUE GAIN (dB) VALUE GAIN (dB)

0x0 0 0x8 -8 0x1 -1 0x9 -9 0x2 -2 0xA -10 0x3 -3 0xB -11 0x4 -4 0xC -12 0x5 -5 0xD -13 0x6 -6 0xE -14 0x7 -7 0xF -15

See the Click-and-Pop Reduction section.6

DAI2 EQ Enable

0 = Disabled 1 = Enabled

DAI1 EQ Enable

0 = Disabled 1 = Enabled

0x30/0x32

0x49

4

3

2

1

0

7

5

1 EQ2EN

0 EQ1EN

EQCLP1/

EQCLP2

DVEQ1/DVEQ2

VS2EN

VSEN

ZDEN

�� Maxim Integrated Products 94

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Playback Level Control

The IC includes separate digital level control for the DAI1 and DAI2 playback audio paths. The DAI1 signal path

DV1G: 0/6/12/18dB

+

MULTI BAND ALC

DVEQ1: 0dB TO -15dB

5-BAND

PARAMETRIC

EQ

Figure 23. Playback Level Control Block Diagram

EQ1EN EQ2EN

EXCURSION LIMITER

5-BAND

PARAMETRIC

EQ

DV2: 0dB TO -15dB

DV1: 0dB TO -15dB

allows boost when MODE1 = 0 and attenuation in any

mode. The DAI2 signal path allows attenuation only.

DVEQ2: 0dB TO -15dB

DACL

MIX

MIXDAL

MIX

MIXDAR

DALEN

DACR

DAREN

DCB2

MODE1 DVFLT

AUDIO/

FILTERS

AUDIO/

VOICE

FILTERS

Table 18. DAC Playback Level Control Register

REGISTER BIT NAME DESCRIPTION

DAI1/DAI2 Mute

0 = Disabled 1 = Enabled

DAI1 Voice Mode Gain

DV1G only applies when MODE1 = 0. 00 = 0dB 01 = 6dB 10 = 12dB 11 = 18dB

DAI1/DAI2 Attenuation

VALUE GAIN (dB) VALUE GAIN (dB)

0x0 0 0x8 -8 0x1 -1 0x9 -9 0x2 -2 0xA -10 0x3 -3 0xB -11 0x4 -4 0xC -12 0x5 -5 0xD -13 0x6 -6 0xE -14 0x7 -7 0xF -15

0x2F/0x31

7 DV1M/DV2M

5

DV1G

4

3

2

DV1/DV2

1

0

�� Maxim Integrated Products 95

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

DAC Input Mixers

The IC’s stereo DAC accepts input from two digital audio paths. The DAC mixer routes any audio path to the left and right DACs (Figure 24).

DV1G: 0/6/12/18dB

+

MULTI BAND ALC

DVEQ1: 0dB TO -15dB

5-BAND

PARAMETRIC

EQ

EQ1EN EQ2EN

EXCURSION LIMITER

PARAMETRIC

5-BAND

EQ

DV2: 0dB TO -15dB

DV1: 0dB TO -15dB

DVEQ2: 0dB TO -15dB

DCB2

MODE1 DVFLT

AUDIO/

FILTERS

AUDIO/

VOICE

FILTERS

MIX

MIXDAL

MIX

MIXDAR

Figure 24. DAC Input Mixer Block Diagram

Table 19. DAC Input Mixer Register

REGISTER BIT NAME DESCRIPTION

0x22

7

6

5

MIXDAL

4

3

2

1

MIXDAR

0

Left DAC Input Mixer

1xxx = DAI1 left channel x1xx = DAI1 right channel xx1x = DAI2 left channel xxx1 = DAI2 right channel

Right DAC Input Mixer

1xxx = DAI1 left channel x1xx = DAI1 right channel xx1x = DAI2 left channel xxx1 = DAI2 right channel

DACL

DALEN

DACR

DAREN

�� Maxim Integrated Products 96

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Receiver Amplifier

The IC includes a single differential receiver amplifier. The receiver amplifier is designed to drive a 32I earpiece speaker. In cases where a single transducer is used for the loudspeaker and receiver, use the SPKBYP switch to route the receiver amplifier output to the left speaker outputs. The receiver amplifier can also be configured as stereo singleended line outputs using the I

2

C interface.

DACL

DALEN

DACR

DAREN

MIX

MIXRECL

MIX

MIXRECR

LINEMODE

RECVOLL: +8dB TO -62dB

RECVOLR: +8dB TO -62dB

+6dB

SPLEN

0dB

RECLEN

0dB

RECREN

RECBYP

RECP/

LOUTL/

RXINP

RECN/

LOUTR/

RXINN

SPKBYP

SPKLP

SPKLN

Figure 25. Receiver Amplifier Block Diagram

�� Maxim Integrated Products 97

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Receiver Output Mixer

The IC’s receiver amplifier accepts input from the stereo DAC, the line inputs (single-ended or differential), and the MIC inputs. Configure the mixer to mix any combination of the available sources. When more than one signal is selected, the mixed signal can be configured to attenuate 6dB, 9dB, or 12dB.

Table 20. Receiver Output Mixer Register

REGISTER BIT NAME DESCRIPTION

0x28

0x29

0x2A

7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0

7 LINE_MODE

3

2

1

0

MIXRECL

MIXRECR

_GAIN

MIXRECL

_GAIN

Left Receiver Output Mixer

1xxxxxxx = Right DAC x1xxxxxx = MIC2 xx1xxxxx = MIC1 xxx1xxxx = INB2 (INBDIFF = 0) or INB2-INB1 (INADIFF = 1) xxxx1xxx = INB1 xxxxx1xx = INA2 (INADIFF = 0) or INA2-INA1 (INADIFF = 1) xxxxxx1x = INA1 xxxxxxx1 = Left DAC

Right Receiver Output Mixer

1xxxxxxx = Left DAC x1xxxxxx = MIC2 xx1xxxxx = MIC1 xxx1xxxx = INB2 (INBDIFF = 0) or INB2-INB1 (INBDIFF = 1) xxxx1xxx = INA1 xxxxx1xx = INA2 (INADIFF = 0) or INA2-INA1 (INADIFF = 1) xxxxxx1x = INA1 xxxxxxx1 = Right DAC

Receiver Output Mode. Configures receive path output mode between BTL and stereo line output. 0 = BTL 1 = Stereo line output

Right Receiver Mixer Gain Select

00 = 0dB 01 = -6dB 10 = -9dB 11 = -12dB

Left Receiver Mixer Gain Select

00 = 0dB 01 = -6dB 10 = -9dB 11 = -12dB

�� Maxim Integrated Products 98

Low-Power, Stereo Audio Codec

with FlexSound Technology

Receiver Output Volume

Table 21. Receiver Output Level Register

REGISTER BIT NAME DESCRIPTION

Receiver Output Mute

0 = Disabled 1 = Enabled

Receiver Output Volume Level

VALUE VOLUME (dB) VALUE VOLUME (dB)

0x00 -62 0x10 -10 0x01 -58 0x11 -8 0x02 -54 0x12 -6 0x03 -50 0x13 -4 0x04 -46 0x14 -2 0x05 -42 0x15 0 0x06 -38 0x16 +1 0x07 -35 0x17 +2 0x08 -32 0x18 +3 0x09 -29 0x19 +4 0x0A -26 0x1A +5

0x0B -23 0x1B +6 0x0C -20 0x1C +6.5 0x0D -17 0x1D +7

0x0E -14 0x1E +7.5

0x0F -12 0x1F +8

0x3B/0x3C

7

4

3

2

1

0

RECLM/

RECRM

RECVOLL/

RECVOLR

MAX98089

�� Maxim Integrated Products 99

MAX98089

Low-Power, Stereo Audio Codec

with FlexSound Technology

Speaker Amplifiers

The IC integrates a stereo filterless Class D amplifier that offers much higher efficiency than Class AB without the typical disadvantages.

The high efficiency of a Class D amplifier is due to the switching operation of the output stage transistors. In a Class D amplifier, the output transistors act as current steering switches and consume negligible additional power. Any power loss associated with the Class D out-

2

put stage is mostly due to the I

R loss of the MOSFET

on-resistance, and quiescent current overhead.

SPVOLL: +8dB TO -62dB

MIX

DACL

DALEN

DACR

DAREN

MIXSPL

MIX

MIXSPR

SPVOLR: +8dB TO -62dB

The theoretical best efficiency of a linear amplifier is 78%, however, that efficiency is only exhibited at peak output power. Under normal operating levels (typical music reproduction levels), efficiency falls below 30%, whereas the IC’s Class D amplifier still exhibits 80% efficiency under the same conditions.

Traditional Class D amplifiers require the use of external LC filters or shielding to meet EN55022B and FCC electromagnetic-interference (EMI) regulation standards. Maxim’s patented active emissions limiting edge-rate control circuitry reduces EMI emissions, allowing operation without any output filtering in typical applications.

SPKLVDD

SPKLP

+6dB

SPLEN

POWER/

DISTORTION LIMITER

+6dB

SPREN

SPKLN

SPKLGND

SPKRVDD

SPKRP

SPKRN

SPKRGND

Figure 26. Speaker Amplifier Path Block Diagram

�� Maxim Integrated Products 100