Rainbow Electronics MAX9860 User Manual

General Description

The MAX9860 is a low-power, voiceband, mono audio codec designed to provide a complete audio solution for wireless voice headsets and other mono voice audio devices. Using an on-chip bridge-tied load mono headphone amplifier, the MAX9860 can output 30mW into a 32Ω earpiece while operating from a single 1.8V power supply. Very low power consumption makes it an ideal choice for battery-powered applications.

The MAX9860’s flexible clocking circuitry utilizes common system clock frequencies ranging from 10MHz to 60MHz, eliminating the need for an external PLL and multiple crystal oscillators. Both the ADC and DAC support sample rates of 8kHz to 48kHz in either synchronous or asynchronous operation. Both master and slave timing modes are supported.

Two differential microphone inputs are available with a user-programmable preamplifier and programmable gain amplifier. Automatic gain control with selectable attack/release times and signal threshold allows maximum dynamic range. A noise gate with selectable threshold provides a means to quiet the channel when no signal is present. Both the DAC and ADC digital filters provide full attenuation for out-of-band signals as well as a 5th order GSM-compliant digital highpass filter. A digital side tone mixer provides loopback of the microphones/ADC signal to the DAC/headphone output.

Serial DAC and ADC data is transferred over a flexible digital I2S-compatible interface that also supports TDM mode. Mode settings, volume control, and shutdown are programmed through a 2-wire, I

C-compatible interface.

The MAX9860 is fully specified over the -40°C to +85°C extended temperature range and is available in a lowprofile, 4mm x 4mm, 24-pin thin QFN package.

Applications

Audio Headsets

Portable Navigation Device

Mobile Phones

Smart Phones

VoIP Phones

Audio Accessories

Features

♦ 1.8V Single-Supply Operation

♦ Digital Highpass Elliptical Filters with Notch for

217Hz (GSM)

♦ Mono 30mW BTL Headphone Amplifier

♦ Dual Low-Noise Microphone Inputs

♦ Automatic Microphone Gain Control and Noise

Gate

♦ 90dB DAC DR (f

= 48kHz)

♦ 81dB ADC DR (f

= 48kHz)

♦ Supports Master Clock Frequencies from 10MHz

to 60MHz

♦ Supports Sample Rates from 8kHz to 48kHz

♦ Flexible Digital Audio Interface

♦ Clickless/Popless Operation

♦ 2-Wire, I

C-Compatible Control Interface

♦ Available in 24-Pin, Thin QFN, 4mm x 4mm x

0.8mm Package

MAX9860

16-Bit Mono Audio Voice Codec

________________________________________________________________

Maxim Integrated Products

19-4349; Rev 0; 10/08

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.

Ordering Information

Denotes a lead-free/RoHS-compliant package.

EP = Exposed pad.

ADC

DIGITAL

AUDIO

INTERFACE

DIGITAL

FILTERING

AND

MIXERS

DIFF MIC

DAC

AVDD AND DVDD

1.7V TO 1.9V

DVDDIO

1.7V TO 3.6V

CLOCK

CONTROL

DIGITAL AUDIO

INPUT/OUTPUT

INTERFACE

MAX9860

Simplified Block Diagram

Pin Configuration and Typical Operating Circuit appear at end of data sheet.

PART TEMP RANGE PIN-PACKAGE

MAX9860ETG+ -40°C to +85°C 24 TQFN-EP*

MAX9860

16-Bit Mono Audio Voice Codec

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

AVDD

= V

DVDD

= V

DVDDIO

= +1.8V, RL= ∞, headphone load (RL) connected between OUTP and OUTN, C

REF

= 2.2µF, C

MICBIAS

PREG

= C

REG

= 1µF, A

VPRE

= +20dB, A

VMICPGA

= 0dB, MCLK = 13MHz, LRCLK = 8kHz, TA= T

MIN

to T

MAX

, unless otherwise noted.

Typical values are at T

= +25°C.) (Note 2)

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.

(Voltages referenced to AGND.)

DVDDIO, SDA, SCL, IRQ.......................................-0.3V to +3.6V

AVDD, DVDD............................................................-0.3V to +2V

AGND, DGND, MICGND .......................................-0.3V to +0.3V

OUTP, OUTN, PREG, REF, MICBIAS ......-0.3V to (AVDD + 0.3V)

MICLP, MICLN, MICRP, MICRN, REG ....-0.3V to (PREG + 0.3V)

MCLK, LRCLK, BCLK,

SDOUT, SDIN..................................-0.3V to (DVDDIO + 0.3V)

Continuous Power Dissipation (T

= +70°C)

24-Pin TQFN (derate 27.8mW/°C above +70°C,

multilayer board) ......................................................2222mW

Junction-to-Ambient Thermal Resistance (θ

) (Note 1)

24-Pin TQFN (derate 27.8mW/°C above +70°C,

multilayer board) ........................................................36°C/W

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer

board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial

Supply Voltage Range

Total Supply Current (Note 3)

Shutdown Supply Current I

Shutdown to Full Operation 10 ms

DAC (Note 4)

Gain Error ±1 ±5 %

Dynamic Range (Note 5) DR

DAC Full-Scale Output 1V

DAC Path Phase Delay

Total Harmonic Distortion + Noise THD+N

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

AVDD+DVDD

SHDN

AVDD (inferred from HP output PSRR) 1.7 1.8 1.9

DVDD (inferred from codec performance tests)

DVDDIO 1.7 1.8 3.6

DAC playback mode (48kHz)

Full operation 8kHz mono ADC + DAC

Full operation 8kHz stereo ADC + DAC

Stereo ADC only (48kHz)

TA = +25°C

+0dB volume setting, f measured at headphone output, T

= +25°C

f = 1kHz, 0dBFS, HP filter disabled, digital input to analog output

f = 1kHz, MCLK = 12.288MHz, LRCLK = 48kHz

AVDD 1.46 2.2

DVDD 1.05 1.6

AVDD 4.08 5.7

DVDD 0.78 1.0

AVDD 6.17 9.0

DVDD 0.8 1.2

AVDD 5.38 8.0

DVDD 1.68 2.2

AVDD 0.56 5

DVDD + DVDDIO

= 8kHz,

fS = 8kHz 1.2

= 16kHz 0.59

1.7 1.8 1.9

84 90 dB

1.65 5

-87 dB

µA

RMS

MAX9860

16-Bit Mono Audio Voice Codec

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

AVDD

= V

DVDD

= V

DVDDIO

= +1.8V, RL= ∞, headphone load (RL) connected between OUTP and OUTN, C

REF

= 2.2µF, C

MICBIAS

PREG

= C

REG

= 1µF, A

VPRE

= +20dB, A

VMICPGA

= 0dB, MCLK = 13MHz, LRCLK = 8kHz, TA= T

MIN

to T

MAX

, unless otherwise noted.

Typical values are at T

= +25°C.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Power-Supply Rejection Ratio PSRR

f = 1kHz, V A

= 0dB

VPGA

f = 10kHz, V A

= 0dB

VPGA

RIPPLE

= 100mV

P-P

DAC LOWPASS DIGITAL FILTER

Passband Cutoff f

PLP

With respect to fS within ripple; fS = 8kHz to 48kHz

0.448 x f

-3dB cutoff 0.451 f

Passband Ripple f < f

Stopband Cutoff f

SLP

With respect to fS; fS = 8kHz to 48kHz

Stopband Attenuation f > f

PLP

, f = 20Hz to 20kHz 75 dB

SLP

±0.1 dB

0.476 x f

DAC HIGHPASS DIGITAL FILTER

5th Order Passband Cutoff (-3dB from Peak, I

C Register

DHPPB

Programmable) (Note 6)

5th Order Stopband Cutoff (-30dB from Peak, I

C Register

DHPSB

Programmable) (Note 6)

DC Blocking DC

Atten

DVFLT = 0x1 (elliptical for 16kHz GSM)

DVFLT = 0x2 (500Hz Butterworth for 16kHz)

DVFLT = 0x3 (elliptical for 8kHz GSM)

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

DVFLT = 0x5 (200Hz Butterworth for 48kHz)

DVFLT = 0x1 (elliptical for 16kHz GSM)

DVFLT = 0x2 (500Hz Butterworth for 16kHz)

DVFLT = 0x3 (elliptical for 8kHz GSM)

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

DVFLT = 0x5 (200Hz Butterworth for 48kHz)

DVFLT ≠ 0x0 90 dB

0.0161

x f

0.0312

x f

0.0321

x f

0.0625

x f

0.0042

x f

0.0139

x f

0.0156

x f

0.0279

x f

0.0312

x f

0.0021

x f

ADC

Full-Scale Input Voltage 0dBFS

Differential MIC Input, A A

= 0dB

VPGA

VPRE

= 0dB,

Channel Gain Mismatch ±0.3 %

P-P

MAX9860

16-Bit Mono Audio Voice Codec

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

AVDD

= V

DVDD

= V

DVDDIO

= +1.8V, RL= ∞, headphone load (RL) connected between OUTP and OUTN, C

REF

= 2.2µF, C

MICBIAS

PREG

= C

REG

= 1µF, A

VPRE

= +20dB, A

VMICPGA

= 0dB, MCLK = 13MHz, LRCLK = 8kHz, TA= T

MIN

to T

MAX

, unless otherwise noted.

Typical values are at T

= +25°C.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Dynamic Range (Note 5) DR

ADC Phase Delay

fS = 8kHz, A A-weighted from 20Hz to f

= 48kHz, A

f = 1kHz, 0dBFS, HP filter disabled, analog input to digital output

= 0dB,

VPRE

= 0dB, TA = +25°C 75 83

VPRE

fS = 8kHz 1.2

= 16kHz 0.61

Total Harmonic Distortion THD f = 1kHz, fS = 48kHz, TA = +25°C -70 -75 dB

Power-Supply Rejection Ratio PSRR

f = 1kHz, V A

= 0dB

VPGA

f = 10kHz, V A

= 0dB

VPGA

RIPPLE

= 100mV

P-P

Channel Crosstalk Driven channel at -1dBFS, f = 1kHz -92 dB

ADC LOWPASS DIGITAL FILTER

Passband Cutoff f

PLP

With respect to fS within ripple; f

= 8kHz to 48kHz

0.445 x f

-3dB cutoff 0.449 f

Passband Ripple f < f

Stopband Cutoff f

SLP

With respect to fS; fS = 8kHz to 48kHz

Stopband Attenuation f > f

PLP

SLP

±0.1 dB

0.469 x f

74 dB

ADC HIGHPASS DIGITAL FILTER

0.0161 x f

0.0312 x f

0.0321 x f

0.0625 x f

0.0042 x f

5th Order Passband Cutoff

(-3dB from Peak, I

C Register

Programmable) (Note 6)

AHPPB

AVFLT = 0x1 (elliptical for 16kHz GSM)

AVFLT = 0x2 (500Hz Butterworth for 16kHz)

AVFLT = 0x3 (elliptical for 8kHz GSM)

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

AVFLT = 0x5 (200Hz Butterworth for 48kHz)

MAX9860

16-Bit Mono Audio Voice Codec

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

AVDD

= V

DVDD

= V

DVDDIO

= +1.8V, RL= ∞, headphone load (RL) connected between OUTP and OUTN, C

REF

= 2.2µF, C

MICBIAS

PREG

= C

REG

= 1µF, A

VPRE

= +20dB, A

VMICPGA

= 0dB, MCLK = 13MHz, LRCLK = 8kHz, TA= T

MIN

to T

MAX

, unless otherwise noted.

Typical values are at T

= +25°C.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

5th Order Stopband Cutoff (-30dB from peak, I

C Register

Programmable) (Note 6)

DC Blocking DC

AHPSB

ATTEN

AVFLT = 0x1 (elliptical for 16kHz GSM)

AVFLT = 0x2 (500Hz Butterworth for 16kHz)

AVFLT = 0x3 (elliptical for 8kHz GSM)

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

AVFLT = 0x5 (200Hz Butterworth for 48kHz)

AVFLT ≠ 0x0 90 dB

0.0139 x f

0.0156 x f

0.0279 x f

0.0312 x f

0.0021 x f

CLOCKING

MCLK Input Frequency

MCLK is not required to be synchronous or related to the desired LRCLK data rate

10 60 MHz

MCLK Duty Cycle 40 50 60 %

Maximum MCLK Input Jitter For guaranteed performance limits 100 ps

LRCLK Data Rate Frequency 8 48 kHz

LRCLK PLL Lock Time 12 25 ms

LRCLK Acceptable Jitter for Maintaining PLL Lock

±20 ns

MONO HEADPHONE AMPLIFIER

Output Power P

OUT

Total Harmonic Distortion + Noise THD+N

Dynamic Range (Note 5) DR

f = 1kHz, THD+N ≤ 1% T

= +25°C

RL = 32Ω, P

= 16Ω, P

= 25mW, f = 1kHz 0.05

OUT

= 25mW, f = 1kHz 0.08

OUT

+0dB volume setting, DAC input at

= 8kHz to 48kHz

RL = 16Ω 30 50

= 32Ω 33

90 dB

AVDD = 1.7V to 1.9V 60 84

= 100mV

RIPPLE

= 100mV

RIPPLE

Output Offset Voltage V

OUTP

- V

OUTN, TA

Capacitive Drive Capability No sustained oscillations

Click-and-Pop Level

Peak voltage into/out of shutdown, 32sps, A-weighted

, f = 217Hz 86Power-Supply Rejection Ratio PSRR

P-P

, f = 20kHz 71

P-P

=+25°C ± 0.25 ± 1 mV

RL = 32Ω 500

= ∞ 100

-70 dBV

RMS

MAX9860

16-Bit Mono Audio Voice Codec

6 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

AVDD

= V

DVDD

= V

DVDDIO

= +1.8V, RL= ∞, headphone load (RL) connected between OUTP and OUTN, C

REF

= 2.2µF, C

MICBIAS

PREG

= C

REG

= 1µF, A

VPRE

= +20dB, A

VMICPGA

= 0dB, MCLK = 13MHz, LRCLK = 8kHz, TA= T

MIN

to T

MAX

, unless otherwise noted.

Typical values are at T

= +25°C.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MICROPHONE AMPLIFIER

PAM = 00 Off

Preamplifier Gain A

VPRE

TA = +25°C

PAM = 01 -0.5 0 +0.5

PAM = 10 19 20 21

PAM = 11 29 30 31

MIC PGA Gain A

VMICPGA

PGAM = 0x14–0x1F 0

PGAM = 0x00 +20

MIC PGA Gain Step Size 1dB

Common-Mode Rejection Ratio CMRR VIN = 100mV

MIC Input Resistance R

IN_MIC

All gain settings, measured at MICLN/MICRN

at 217Hz 50 dB

P-P

30 50 kΩ

MIC Input Bias Voltage 0.7 0.8 0.9 V

Total Harmonic Distortion + Noise THD+N

MIC Power-Supply Rejection Ratio

PSRR

= 0dB, A

A V

VPRE

= 1V

= 31mV

= +30dB, A

, f = 1kHz

P-P

VMICPGA

, f = 1kHz

AVDD = 1.7V to 1.9V 60 95 dB

= 100mV at 1kHz, input referred 82 dB

RIPPLE

= 100mV at 10kHz, input referred 76 dB

RIPPLE

= 0dB,

VMICPGA

= 0dB,

-75 dB

-66 dB

MICROPHONE BIAS

MICBIAS Output Voltage V

MICBIASILOAD

Load Regulation I

MICBIAS Line Ripple Rejection LRR

MICBIAS Noise Voltage A-weighted 9.5 µV

= 1mA, TA = +25°C 1.5 1.55 1.6 V

= 1mA to 2mA 0.2 10 mV

LOAD

RIPPLE

= 100mV

at 217Hz 82 dB

P-P

at 10kHz 81 dB

P-P

RMS

AUTOMATIC GAIN CONTROL

AGC Hold Duration AGCHLD[1:0] setting range, FREQ ≠ 0 50 400 ms

AGC Attack Time AGCATK[1:0] setting range, FREQ ≠ 0 3 200 ms

AGC Release Time AGCRLS[2:0] setting range, FREQ ≠ 0 0.078 10 s

AGC Threshold Level AGCSTH[3:0] setting range, FREQ ≠ 0 -3 -18 dB

NOISE GATE

NG Attack and Release Time 0.5 s

NG Threshold Level -72 -16 dB

Noise Gate Threshold Step Size 4dB

NG Attenuation 012dB

DIGITAL SIDETONE

Sidetone Gain Adjust DVST 2dB steps -60 0 dB

Sidetone Phase Delay PDLY

MIC input to headphone output, f = 1kHz, HP filter disabled

8kHz 2.2

16kHz 1.1

MAX9860

16-Bit Mono Audio Voice Codec

_______________________________________________________________________________________ 7

DIGITAL AUDIO INTERFACE ELECTRICAL CHARACTERISTICS

DVDD

= V

DVDDIO

= 1.8V, unless otherwise noted.) (Note 2)

I2C INTERFACE ELECTRICAL CHARACTERISTICS

DVDD

= V

DVDDIO

= 1.8V, unless otherwise noted.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

BCLK Cycle Time t

BCLK High Time t

BCLK Low Time t

BCLK or LRCLK Rise and Fall Time

SDIN or LRCLK to BCLK Rising Setup Time

SDIN or LRCLK to BCLK Falling Setup Time

SDIN or LRCLK to BCLK Rising Hold Time

SDIN or LRCLK to BCLK Falling Hold Time

SDOUT Delay Time from BCLK Rising Edge

BCLKS

BCLKH

BCLKL

, t

DLY

Slave operation 75 ns

Slave operation 30 ns

Master operation 7 ns

ABCI = DBCI = 0 25 ns

ABCI = DBCI = 1 25 ns

ABCI = DBCI = 0 0 ns

ABCI = DBCI = 1 0 ns

ABCI = DBCI = 0, CL = 30pF 0 40 ns

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

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

SDA and SCL Receiving Fall Time

SCL

BUF

HD,STA

LOW

HIGH

SU,STA

HD,DAT

SU,DAT

CB is in pF 20 + 0.1C

0 400 kHz

1.3 µs

0.6 µs

1.3 µs

0.6 µs

0 900 ns

100 ns

300 ns

MAX9860

16-Bit Mono Audio Voice Codec

8 _______________________________________________________________________________________

Note 2: All devices are 100% production tested at room temperature. All temperature limits are guaranteed by design. Note 3: Supply current measurements taken with no applied signal at microphone inputs. A digital zero audio signal used for all dig-

ital serial audio inputs. Headphone outputs are loaded as stated in the global conditions.

Note 4: DAC performance is measured at headphone outputs. Note 5: ADC, DAC, and headphone amplifier dynamic ranges are measured using the EIAJ method. -60dBV 1kHz input signal, A-weight-

ed and normalized to 0dBFS.

Note 6: Notch for GSM filters occurs at 217Hz.

I2C INTERFACE ELECTRICAL CHARACTERISTICS (continued)

DVDD

= V

DVDDIO

= 1.8V, unless otherwise noted.) (Note 2)

SDA Transmitting Fall Time

Setup Time for STOP Condition t

Bus Capacitance C

Pulse Width of Suppressed Spike t

DIGITAL INPUTS (LRCLK, BCLK, SDIN, MCLK)

Input Voltage High V

Input Voltage Low V

MCLK Input Voltage High 1.4 V

MCLK Input Voltage Low 0.4 V

Input Leakage Current IIH, I

Input Capacitance 3pF

DIGITAL INPUTS (SCL, SDA)

Input Voltage High V

Input Voltage Low V

Input Hysteresis 200 mV

Input Leakage Current IIH, I

Input Capacitance 3pF

CMOS DIGITAL OUTPUTS (BCLK, LRCLK, SDOUT)

Output Low Voltage V

Output High Voltage V

OPEN-DRAIN DIGITAL OUTPUTS (SDA, IRQ)

Output High Leakage Current I

Output Low Voltage V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SU,STO

CB is in pF 20 + 0.1C

TA = +25°C -1 +1 µA

TA = +25oC-1+1µA

IOL = 3mA 0.4 V

IOL = 3mA

= DVDDIO, TA = +25°C -1 +1 µA

OUT

IOL = 3mA 0.4 V

x DVDDIO

x DVDD

DVDDIO

0.6 µs

050ns

0.7

- 0.4

250 ns

400 pF

0.3

x DVDDIO

0.3

x DVDD

MAX9860

16-Bit Mono Audio Voice Codec

_______________________________________________________________________________________

Typical Operating Characteristics

AVDD

= +1.8V, V

DVDD

= V

DVDDIO

= +1.8V, RL= ∞, headphone load (RL) connected between OUTP and OUTN, C

REF

= 2.2µF,

PREG

= C

REG

= 1µF, C

MICBIAS

= 1µF A

VMICPGA

= 0dB, A

VPRE

= +20dB, MCLK = 13MHz, TA= +25°C, unless otherwise noted.)

TOTAL HARMONIC DISTORTION + NOISE

vs. OUTPUT POWER (DAC TO HP)

RL = 32Ω

f = 3.5kHz

0.1

THD+N (%)

0.01

0.001 030

f = 1kHz

f = 20kHz

252015105

OUTPUT POWER (mW)

TOTAL HARMONIC DISTORTION + NOISE

MAX9860 toc01

RL = 16Ω

0.1

THD+N (%)

0.01

0.001 060

TOTAL HARMONIC DISTORTION + NOISE

vs. FREQUENCY (DAC TO HP)

0.1

THD+N (%)

0.01

RL = 16Ω

= 5mW

OUT

= 20mW

OUT

MAX9860 toc04

0.1

THD+N (%)

0.01

MICPRE = 0dB V

vs. OUTPUT POWER (DAC TO HP)

f = 3.5kHz

f = 1kHz

f = 20kHz

5040302010

OUTPUT POWER (mW)

vs. FREQUENCY (MICL TO ADC)

= 1V

P-P

MAX9860 toc02

MAX9860 toc05

TOTAL HARMONIC DISTORTION + NOISE

vs. FREQUENCY (DAC TO HP)

RL = 32Ω

= 5mW

0.1

THD+N (%)

0.01

0.001

0.01 10

OUT

= 20mW

OUT

FREQUENCY (kHz)

10.1

TOTAL HARMONIC DISTORTION + NOISE

vs. FREQUENCY (MICL TO ADC)

MICPRE = +20dB

= 100mV

P-P

THD+N (%)

0.1

MAX9860 toc03

MAX9860 toc06

0.001

0.01 10 FREQUENCY (kHz)

10.1

TOTAL HARMONIC DISTORTION + NOISE

vs. FREQUENCY (MICL TO ADC)

MICPRE = +30dB

= 31V

P-P

0.1

THD+N (%)

0.01

0.001

0.01 100 FREQUENCY (kHz)

MAX9860 toc08

0.01

0.01 100 FREQUENCY (kHz)

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY (DAC TO HP)

-10

-20

-30

-40

-50

-60

PSRR (dB)

-70

-80

-90

-100

-110

-120

0.01 100 FREQUENCY (kHz)

1010.1

MAX9860 toc09

1010.1

0.001

0.01 100 FREQUENCY (kHz)

1010.1

HEADPHONE OUTPUT POWER

vs. LOAD RESISTANCE

MAX9860 toc07

OUTPUT POWER (mW)

1010.1

0 150

LOAD RESISTANCE (Ω)

125100755025

MAX9860

16-Bit Mono Audio Voice Codec

10 ______________________________________________________________________________________

Typical Operating Characteristics (continued)

AVDD

= +1.8V, V

DVDD

= V

DVDDIO

= +1.8V, RL= ∞, headphone load (RL) connected between OUTP and OUTN, C

REF

= 2.2µF,

PREG

= C

REG

= 1µF, C

MICBIAS

= 1µF A

VMICPGA

= 0dB, A

VPRE

= +20dB, MCLK = 13MHz, TA= +25°C, unless otherwise noted.)

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY (MIC TO ADC)

-10

-20

-30

-40

-50

-60

PSRR (dB)

-70

-80

-90

-100

-110

-120

0.01 100 FREQUENCY (kHz)

0dBFS FFT (DAC TO HP)

MAX9860 toc10

1010.1

-20

-40

-60

-80

OUTPUT AMPLITUDE (dB)

-100

-120

-140 020

FREQUENCY (kHz)

MCLK = 13MHz LRCLK = 8kHz PLL DISABLED

15105

MAX9860 toc11

-20

-40

-60

-80

OUTPUT AMPLITUDE (dB)

-100

-120

-140

-60dBFS FFT (DAC TO HP)

MCLK = 13MHz LRCLK = 8kHz PLL DISABLED

020

FREQUENCY (kHz)

15105

MAX9860 toc12

-20

-40

-60

-80

OUTPUT AMPLITUDE (dB)

-100

-120

-140 020

FREQUENCY (kHz)

MCLK = 13MHz LRCLK = 8kHz PLL ENABLED

15105

MAX9860 toc13

-20

-40

-60

-80

OUTPUT AMPLITUDE (dB)

-100

-120

-140

-60dBFS FFT (DAC TO HP AMP)

0dBFS FFT (DAC TO HP)

-20

-40

-60

-80

OUTPUT AMPLITUDE (dB)

-100

-120

-140 020

FREQUENCY (kHz)

MCLK = 12.288MHz LRCLK = 48kHz PLL DISABLED

15105

MAX9860 toc16

-20

-40

-60

-80

OUTPUT AMPLITUDE (dB)

-100

-120

-140

-60dBFS FFT (DAC TO HP)

020

0dBFS FFT (MICL TO ADC)

FREQUENCY (kHz)

MCLK = 13MHz LRCLK = 8kHz PLL ENABLED

15105

MCLK = 13MHz LRCLK = 8kHz PLL DISABLED

321

MAX9860 toc14

MAX9860 toc17

-20

-40

-60

-80

OUTPUT AMPLITUDE (dB)

-100

-120

-140

-20

-40

-60

-80

OUTPUT AMPLITUDE (dB)

-100

-120

-140

0dBFS FFT (DAC TO HP AMP)

MCLK = 12.288MHz LRCLK = 48kHz PLL DISABLED

020

FREQUENCY (kHz)

15105

MAX9860 toc15

-60dBFS FFT (MICL TO ADC)

MCLK = 13MHz LRCLK = 8kHz PLL DISABLED

FREQUENCY (kHz)

321

MAX9860 toc18

MAX9860

16-Bit Mono Audio Voice Codec

______________________________________________________________________________________ 11

Typical Operating Characteristics (continued)

AVDD

= +1.8V, V

DVDD

= V

DVDDIO

= +1.8V, RL= ∞, headphone load (RL) connected between OUTP and OUTN, C

REF

= 2.2µF,

PREG

= C

REG

= 1µF, C

MICBIAS

= 1µF A

VMICPGA

= 0dB, A

VPRE

= +20dB, MCLK = 13MHz, TA= +25°C, unless otherwise noted.)

0dBFS FFT (MICL TO ADC)

-20

-40

-60

-80

OUTPUT AMPLITUDE (dB)

-100

-120

-140 04

-60dBFS FFT (MICL TO ADC)

-20

-40

-60

-80

OUTPUT AMPLITUDE (dB)

-100

-120

-140 020

FREQUENCY (kHz)

MCLK = 12.288MHz LRCLK = 48kHz PLL DISABLED

FREQUENCY (kHz)

MCLK = 13MHz LRCLK = 8kHz PLL ENABLED

321

MAX9860 toc19

-20

-40

-60

-80

OUTPUT AMPLITUDE (dB)

-100

-120

-140 04

-5dBFS WIDEBAND FFT (DAC TO HP)

MAX9860 toc22

15105

-20

-40

-60

OUTPUT AMPLITUDE (dB)

-80

-100

0.1 10,000

-60dBFS FFT (MICL TO ADC)

MCLK = 13MHz LRCLK = 8kHz PLL ENABLED

321

FREQUENCY (kHz)

MAX9860 toc20

-20

-40

-60

-80

OUTPUT AMPLITUDE (dB)

-100

-120

-140

0dBFS FFT (MICL TO ADC)

020

FREQUENCY (kHz)

-60dBFS WIDEBAND FFT (DAC TO HP)

MAX9860 toc23

-20

-40

-60

OUTPUT AMPLITUDE (dB)

-80

-100

0.1 10,000 FREQUENCY (kHz)

FREQUENCY (kHz)

MCLK = 13MHz LRCLK = 8kHz PLL DISABLED

= 32Ω

1000100101

MCLK = 12.288MHz LRCLK = 48kHz PLL DISABLED

15105

MCLK = 13MHz LRCLK = 8kHz PLL DISABLED

= 32Ω

1000100101

MAX9860 toc21

MAX9860 toc24

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

4.5

4.0

3.5

3.0

2.5

2.0

1.5

SUPPLY CURRENT (mA)

1.0

0.5

1.65 1.95

AVDD

FULL-DUPLEX 8kHz MODE

+ I

DVDD

DVDDIO

SUPPLY VOLTAGE (V)

DAC DIGITAL FILTER

FREQUENCY RESPONSE, 8kHz

MAX9860 toc25

-10

-20

-30

-40

-50

-60

OUTPUT AMPLITUDE (dBFS)

-70 ELLIPTICAL FOR 8kHz GSM WITH

-80 NOTCH AT 217Hz

-90

1.901.851.801.751.70

0.01 10 FREQUENCY (kHz)

10.1

MAX9860 toc26

-10

-20

-30

-40

-50

-60

OUTPUT AMPLITUDE (dBFS)

-70

-80

-90

0.01 10

ADC DIGITAL FILTER

FREQUENCY RESPONSE, 8kHz

ELLIPTICAL FOR 8kHz GSM WITH NOTCH AT 217Hz

10.1

FREQUENCY (kHz)

MAX9860 toc27

MAX9860

16-Bit Mono Audio Voice Codec

12 ______________________________________________________________________________________

Typical Operating Characteristics (continued)

AVDD

= +1.8V, V

DVDD

= V

DVDDIO

= +1.8V, RL= ∞, headphone load (RL) connected between OUTP and OUTN, C

REF

= 2.2µF,

PREG

= C

REG

= 1µF, C

MICBIAS

= 1µF A

VMICPGA

= 0dB, A

VPRE

= +20dB, MCLK = 13MHz, TA= +25°C, unless otherwise noted.)

HEADPHONE STARTUP WAVEFORM

MAX9860 toc28

TIME (4ms/div)

SPK+ -SPK-

(1V/div)

SDA

(2V/div)

HEADPHONE SHUTDOWN WAVEFORM

MAX9860 toc29

TIME (2ms/div)

SPK+ -SPK-

(1V/div)

SDA

(2V/div)

ADC OUTPUT

(500mV/div)

SDA

(2V/div)

SOFT-START ADC

MAX9860 toc30

TIME (4ms/div)

-80

-60

-70

-40

-50

-30

-20

-10

-100 -80-90 -60-70 -40-50 -20-30 0-10

AUTOMATIC GAIN CONTROL THRESHOLDS

MAX9860 toc31

INPUT AMPLITUDE (dBV)

OUTPUT AMPLITUDE (dBFS)

-90

-70

-80

-50

-60

-40

-30

-10

-20

-100 -80 -60 -40 -20

NOISE GATE THRESHOLDS

MAX9860 toc32

INPUT AMPLITUDE (dBV)

OUTPUT AMPLITUDE (dBFS)

TOTAL HARMONIC DISTORTION + NOISE

vs. MCLK FREQUENCY, 0dBFS (DAC to HP)

MAX9860 toc33

MCLK FREQUENCY (MHz)

THD+N (%)

50403020

0.01

0.1

0.001 10 60

LRCLK = 8kHz

DYNAMIC RANGE

vs. MCLK FREQUENCY, -60dBFS (DAC to HP)

MAX9860 toc34

MCLK FREQUENCY (MHz)

DYNAMIC RANGE (dB)

50403020

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

-120 10 60

LRCLK = 8kHz

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