MAXIM MAX97002 User Manual

19-5111; Rev 1; 7/10

EVALUATION KIT

AVAILABLE

Audio Subsystem with Mono Class D

Speaker and Class H Headphone Amplifiers

General Description

The MAX97002 mono audio subsystem combines a mono speaker amplifier with a stereo headphone amplifier and an analog DPST switch. The headphone and speaker amplifiers have independent volume control and on/off control. The 4 inputs are configurable as 2 differential inputs or 4 single-ended inputs.

The entire subsystem is designed for maximum efficiency. The high-efficiency, 700mW, Class D speaker amplifier operates directly from the battery and consumes no more than 1FA in shutdown mode. The Class H headphone amplifier utilizes a dual-mode charge pump to maximize efficiency while outputting a groundreferenced signal that does not require output coupling capacitors.

The speaker amplifier incorporates a distortion limiter to automatically reduce the volume level when excessive clipping occurs. This allows high gain for low-level signals without compromising the quality of large signals.

2

All control is performed using the 2-wire I The MAX97002 operates over the extended -40NC to +85NC temperature range, and is available in the 2mm x

2.5mm, 20-bump, WLP package (0.5mm pitch).

Applications

Cell Phones

Portable Media Players

C interface.

Features

S 2.7V to 5.5V Speaker Supply Voltage

S

1.6V to 2V Headphone Supply Voltage

S

700mW Speaker Output (V

= 8ω + 68µH)

Z

SPK

S

37mW/Channel Headphone Output (R

S

Low-Emission Class D Amplifier

S

Efficient Class H Headphone Amplifier

S

Ground-Referenced Headphone Outputs

S

2 Stereo Single-Ended/Mono Differential Inputs

S

Integrated Distortion Limiter (Speaker Outputs)

S

Integrated DPST Analog Switch

S

No Clicks and Pops

S

TDMA Noise Free

S

2mm x 2.5mm, 20-Bump, 0.5mm Pitch WLP

PVDD

= 3.7V,

HP

= 16I)

Package

Ordering Information

PART TEMP RANGE PIN-PACKAGE

MAX97002EWP+

-40NC to +85NC

20 WLP

MAX97002

Simplified Block Diagram

BATTERY1.8V

POWER SUPPLY

STEREO/

MONO INPUT

STEREO/

MONO INPUT

_______________________________________________________________ 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.

LIMITER

I2C

CONTROL

VOLUME

MAX97002

CLASS H

AMPLIFIER

CHARGE

PUMP

CLASS D

AMPLIFIER

BYPASS

Audio Subsystem with Mono Class D Speaker and Class H Headphone Amplifiers

Table of ConTenTs

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

Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Simplified Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Functional Diagram/Typical Application Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

MAX97002

Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Digital I/O Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2

C TIMING Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

I

Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Detailed Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Signal Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Mixers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Class D Speaker Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Ultra-Low EMI Filterless Output Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Distortion Limiter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Analog Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Headphone Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

DirectDrive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Charge Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Class H Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Low-Power Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2

C Slave Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

I

2

C Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

I

Mixers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Volume Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Distortion Limiter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Power Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Charge-Pump Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

2

C Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

I

Bit Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

START and STOP Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Charge-Pump Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

2

Audio Subsystem with Mono Class D

Speaker and Class H Headphone Amplifiers

Table of ConTenTs (ConTinued)

Early STOP Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Slave Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Write Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Read Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Applications Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Filterless Class D Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

RF Susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Component Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Optional Ferrite Bead Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Input Capacitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Charge-Pump Capacitor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Charge-Pump Flying Capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Charge-Pump Holding Capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Supply Bypassing, Layout, and Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

WLP Applications Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Package Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

MAX97002

3

Audio Subsystem with Mono Class D Speaker and Class H Headphone Amplifiers

Functional Diagram/Typical Application Circuit

1.6V TO 2V 2.7V TO 5.5V

1µF 0.1µF 10µF

V

DD

B4

PVDD

D4

MAX97002

0.47µF

OPTIONAL

INA1

INA2

INB1 D1

INB2 D2

COM1 C3

COM2 D3

PGAINA

-6dB TO +18dB

C1

PGAINA

-6dB TO +18dB

C2

+

PGAINB

-6dB TO +18dB

PGAINB

-6dB TO +18dB

INADIFF

INBDIFF

MUX

LPMODE

MIX

HPLMIX

MIX

HPRMIX

MIX

SPKMIX

HPLVOL:

-64dB TO +6dB

HPRVOL:

-64dB TO +6dB

SPKVOL:

-30dB TO +20dB

CLASS H

PVDD

CLASS D

+12dB

SPKEN

PGND

+

ANALOG SWITCHES

HPVDD

0/3dB

HPLEN

HPVSS

HPVDD

0/3dB

HPREN

HPVSS

THD LIMITER

LMTEN

BIAS

B1

BIAS

1µF

HPLA2

HPRA1

C5

OUTP

OUTN

D5

V

SDA B2

SCL B3

DD

2

I

C

INTERFACE

BYPEN

MAX97002

C4

GND

A4

C1P

V

DD

CHARGE PUMP

A5

C1N

B5

A3

HPVDD HPVSS

4

Audio Subsystem with Mono Class D

Speaker and Class H Headphone Amplifiers

ABSOLUTE MAXIMUM RATINGS

(Voltages with respect to GND.) V

, HPVDD ........................................................-0.3V to +2.2V

DD

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

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

C1N .....................................(HPVSS - 0.3V) to (HPVDD + 0.3V)

C1P ...................................................... -0.3V to (HPVDD + 0.3V)

HPL, HPR ............................ (HPVSS - 0.3V) to (HPVDD + 0.3V)

INA1, INA2, INB1, INB2, BIAS ............................. -0.3V to +6.0V

SDA, SCL .............................................................-0.3V to +6.0V

COM1, COM2, OUTP, OUTN .................-0.3V to (PVDD + 0.3V)

Continuous Current In/Out of PVDD, GND, OUT_ ........ Q800mA

Continuous Current In/Out of HPR, HPL, VDD .............. Q140mA

Continuous Current In/Out of COM1, COM2 ................ Q150mA

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.

ELECTRICAL CHARACTERISTICS

(V

= 1.8V, V

VDD

HPRVOL = SPKVOL = 0dB, speaker loads (Z HPL or HPR to GND. SDA and SCL pullup voltage = 1.8V. Z T

= T

MIN

to T

MAX

A

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Speaker Amplifier Supply Voltage Range

Headphone Amplifier Supply Voltage Range

Quiecsent Supply Current

Shutdown Current I

Turn-On Time t

Input Resistance R

PVDD

= 3.7V, V

= 0V. Input signal applied at INA configured single-ended, preamp gain = 0dB, HPLVOL =

GND

) connected between OUTP and OUTN. Headphone loads (RHP) connected from

SPK

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

PVDD Guaranteed by PSRR test 2.7 5.5 V

V

DD

Guaranteed by PSRR test 1.6 2 V

Low-power headphone mode, T

HP mode, T

= +25NC

A

stereo SE input on INA, INB disabled SPK mode, T mono differential Input on INB, INA disabled SPK + HP mode, T +25NC, stereo SE input on INA, INB disabled

SHDN

ON

IN

TA = +25NC, V

Time from power-on to full operation, including soft-start

TA = +25NC, internal gain

Continuous Input Current (all other pins) ........................ Q20mA

Duration of OUT_ Short Circuit to GND or PVDD .....Continuous

Duration of Short Circuit Between

OUTP and OUTN ................................................... Continuous

Duration of HP_ Short Circuit to GND or V Continuous Power Dissipation (T

= +70NC)

A

...........Continuous

DD

20-Bump WLP Multilayer Board

(derate 13mW/NC above +70NC)................................1040mW

Junction Temperature .....................................................+150NC

Operating Temperature Range .......................... -40NC to +85NC

Storage Temperature Range ............................ -65NC to +150NC

Lead Temperature (soldering, 10s) ................................+260NC

= J, RHP = J. C

SPK

= +25NC,

= +25NC

A

=

A

= 0V

SHDN

C1P-C1N

I

VDD

I

PVDD

I

VDD

I

PVDD

I

VDD

I

PVDD

I

VDD

I

PVDD

I

VDD + IPVDD

V

= 0V,

VDD

I

PVDD

= C

HPVDD

= C

1.35 1.85

0.35 0.55

1.35 1.85

0.75 1.15

0.32 0.6

1.38 2.2

1.35 1.85

1.8 2.7

< 1

HPVSS

0 8

10 ms

Gain = -6dB, -3dB 41.2

Gain = 0dB, 3dB, 6dB, dB

16 20.6 27

Gain = 18dB 5.5 7.2 9.6

= C

BIAS

= 1FF.

mA

FA

kI

MAX97002

5

Audio Subsystem with Mono Class D Speaker and Class H Headphone Amplifiers

ELECTRICAL CHARACTERISTICS (continued)

(V

= 1.8V, V

VDD

HPRVOL = SPKVOL = 0dB, speaker loads (ZSPK) connected between OUTP and OUTN. Headphone loads (RHP) connected from HPL or HPR to GND. SDA and SCL pullup voltage = 1.8V. ZSPK = J, RHP = J. C T

= T

A

Feedback Resistance R

MAX97002

Maximum Input Signal Swing

Common-Mode Rejection Ratio

Input DC Voltage IN__ inputs 1.125 1.2 1.275 V Bias Voltage V

SPEAKER AMPLIFIER

Output Offset Voltage V

Click-and-Pop Level K

Power-Supply Rejection Ratio (Note 2)

Output Power (Note 3)

Total Harmonic Distortion Plus Noise

Signal-to-Noise Ratio SNR

to T

MIN

MAX

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

= 3.7V, V

PVDD

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

= 0V. Input signal applied at INA configured single-ended, preamp gain = 0dB, HPLVOL =

GND

F

CMRR

BIAS

OS

CP

PSRR

THD+N

TA = +25NC, external gain Preamp = 0dB 2.3 Preamp = +18dB 0.29

Preamp = external gain

f = 1kHz (differential input mode), gain = 0dB

f = 1kHz (differential input mode), gain = 18dB

1.13 1.2 1.27 V

TA = +25NC, SPKM = 1 Q0.5 Q4 T

= +25NC, SPKMIX = 0x01, IN_DIFF = 0 Q1.5

A

Peak voltage, TA = +25NC, A-weighted, 32 samples per second, volume at mute (Note 2)

T

= +25NC

A

THD+N P 1%, f = 1kHz, Z

= 8I + 68FH

SPK

f = 1kHz, P R

= 8I

SPK

A-weighted, SPKMIX = 0x03, referenced to 700mW

= 360mW, TA = +25NC,

OUT

Into shutdown -70

Out of shutdown -70

= 2.7V to

V

PVDD

5.5V

f = 217Hz, 200mV

P-P

f = 1kHz, 200mV

P-P

f = 20kHz, 200mV

P-P

= 4.2V 920

V

PVDD

= 3.7V 700

PVDD

= 3.3V 550

V

PVDD

IN_DIFF = 0 (single-ended)

IN_DIFF = 1 (differential)

C1P-C1N

ripple

= C

HPVDD

19 20 21

2.3 x

RINEX/RF

55

32

50 77

73

57

0.05 0.6 %

96

HPVSS

= C

BIAS

= 1FF.

kI

V

P-P

dB

mV

dBV

dB

mWV

dB

6

Audio Subsystem with Mono Class D

Speaker and Class H Headphone Amplifiers

ELECTRICAL CHARACTERISTICS (continued)

(V

= 1.8V, V

VDD

HPRVOL = SPKVOL = 0dB, speaker loads (ZSPK) connected between OUTP and OUTN. Headphone loads (RHP) connected from HPL or HPR to GND. SDA and SCL pullup voltage = 1.8V. ZSPK = J, RHP = J. C T

= T

MIN

to T

MAX

A

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Oscillator Frequency f Spread-Spectrum Bandwidth Gain 11.5 12 12.5 dB Current Limit 1.5 A Efficiency

Output Noise

CHARGE PUMP

Charge-Pump Frequency

Positive Output Voltage V

Negative Output Voltage V

Headphone Output Voltage Threshold

Mode Transition Timeouts

HEADPHONE AMPLIFIERS

Output Offset Voltage V

Click-and-Pop Level K

PVDD

= 3.7V, V

= 0V. Input signal applied at INA configured single-ended, preamp gain = 0dB, HPLVOL =

GND

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

OSC

E

250 kHz

= 600mW, f = 1kHz 87 %

P

OUT

A-weighted, (SPKMIX = 0x01), IN_DIFF = 1, SPKVOL = -30dB

V

HPVDD

HPVSS

V

TH1

V

TH2

= V

HPL

= V

HPL

= V

V

HPL

V

, V

HPL

, V

V

HPL

V

, V

HPL

, V

V

HPL

Output voltage at which the charge pump switches between fast and slow clock

Output voltage at which the charge pump switches modes, VOUT rising or falling

= 0V, TA = +25NC

HPR

= 0.2V 665

HPR

= 0.5V 500

HPR

> V

HPR

< V > V < V

TH

Time it takes for the charge pump to transition from Invert to split mode

Time it takes for the charge pump to transition from split to invert mode

OS

CP

TA = +25NC, volume at mute T

= +25NC, HP_MIX = 0x1, IN_DIFF = 0

A

Peak voltage, TA = +25NC, A-weighted, 32 samples per second, volume at mute (Note 2)

Into shutdown -74

Out of shutdown

C1P-C1N

= C

HPVDD

= C

Q20

37

80 83 85

V

DD

VDD/2

-V

DD

-VDD/2

QV

QVDD

DD

x 0.05

QV

x 0.21

DD

x 0.08

QVDD

x 0.25

32 ms

20

Q0.15 Q0.6

Q0.5

-74

HPVSS

= C

BIAS

kHz

QVDD

x 0.13

QVDD

x 0.3

= 1FF.

FV

RMS

kHzV

V

Fs

mV

dBV

MAX97002

7

Audio Subsystem with Mono Class D Speaker and Class H Headphone Amplifiers

ELECTRICAL CHARACTERISTICS (continued)

(V

= 1.8V, V

VDD

HPRVOL = SPKVOL = 0dB, speaker loads (ZSPK) connected between OUTP and OUTN. Headphone loads (RHP) connected from HPL or HPR to GND. SDA and SCL pullup voltage = 1.8V. ZSPK = J, RHP = J. C T

= T

MIN

to T

MAX

A

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MAX97002

Power-Supply Rejection Ratio (Note 2)

Output Power P

Channel-to-Channel Gain Tracking

Total Harmonic Distortion Plus Noise

Signal-to-Noise Ratio SNR

Slew Rate SR 0.35 Capacitive Drive C

Crosstalk

ANALOG SWITCH

On-Resistance R

Total Harmonic Distortion Plus Noise

Off-Isolation

PVDD

= 3.7V, V

= 0V. Input signal applied at INA configured single-ended, preamp gain = 0dB, HPLVOL =

GND

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

= 1.62V to

V

DD

1.98V

f = 217Hz, V

RIPPLE

200mV

PSRR

= +25NC

T

A

f = 1kHz, V

RIPPLE

200mV

f = 20kHz, V

RIPPLE

200mV

= 16I

R

THD+N = 1%, f = 1kHz

OUT

T

= +25NC, HPL to HPR, HPLMIX = 0x01,

THD+N P

A

HPRMIX = 0x02, IN_DIFF = 0

= 10mW, f = 1kHz

OUT

A-weighted, R

= 16I, HPLMIX = 0x01,

HP

R

R R

HP

= 32I

= 32I = 16I

HPRMIX = 0x02, IN_DIFF = 0

L

200 pF

HPL to HPR, HPR to HPL, f = 20Hz to 20kHz

T

= +25NC

A

T

= T

A

T

MAX

10I in series with each switch

No series resistors

ON

THD+N

I

= 20mA, V

NC_

COM_

=

0V and PVDD, SWEN = 1

V

DIFCOM_

V

CMCOM_

= 2V

P-P

= PVDD/2,

,

f = 1kHz, SWEN = 1, Z

= 8I + 68FH

SPK

SWEN = 0, COM1 and COM2 to GND = 50I, f = 10kHz, referred to signal applied to OUTP and OUTN

C1P-C1N

=

P-P

=

P-P

=

P-P

to

MIN

= C

HPVDD

= C

HPVSS

= C

70 85

84

80

69

37

30

Q0.3 Q2.5

0.02

0.03 0.1

100 dB

68 dB

1.6 4

5.2

0.05

0.3

90 dB

BIAS

= 1FF.

dB

mW

%

V/Fs

I

%

8

Audio Subsystem with Mono Class D

Speaker and Class H Headphone Amplifiers

ELECTRICAL CHARACTERISTICS (continued)

(V

= 1.8V, V

VDD

HPRVOL = SPKVOL = 0dB, speaker loads (ZSPK) connected between OUTP and OUTN. Headphone loads (RHP) connected from HPL or HPR to GND. SDA and SCL pullup voltage = 1.8V. ZSPK = J, RHP = J. C T

= T

A

PREAMPLIFIER

Gain

VOLUME CONTROL

Volume Level

Mute Attenuation f = 1kHz

Zero-Crossing Detection Timeout

LIMITER

Attack Time 1 ms

Release Time Constant

to T

MIN

MAX

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

= 3.7V, V

PVDD

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

= 0V. Input signal applied at INA configured single-ended, preamp gain = 0dB, HPLVOL =

GND

PGAIN_ = 000 -6.5 -6 -5.5 PGAIN_ = 001 -3.5 -3 -2.5 PGAIN_ = 010 -0.5 0 +0.5

100 ms

PGAIN_ = 011 2.5 3 3.5 PGAIN_ = 100 5.5 6 6.5 PGAIN_ = 101 8.5 9 9.5 PGAIN_ = 110 17.5 18 18.5

HP_VOL = 0x1F 5.5 6 6.5 HP_VOL = 0x00 -68 -64 -60 SPKVOL = 0x3F 19 20 21 SPKVOL = 0x00 -31 -30 -29

Speaker 100 Headphone 110

THDT1 = 0 1.4 THDT1 = 1 2.8

C1P-C1N

= C

HPVDD

= C

HPVSS

= C

BIAS

= 1FF.

dB

s

MAX97002

DIGITAL I/O CHARACTERISTICS

(V

= 3.7V, V

PVDD

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DIGITAL INPUTS (SDA, SCL)

Input Voltage High V

Input Voltage Low V

Input Hysteresis V Input Capacitance C Input Leakage Current I

DIGITAL OUTPUTS (SDA Open Drain)

Output Low Voltage V

= 0V. TA = T

GND

MIN

to T

HYS

IH

IL

IN

OL

MAX

I

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

TA = +25NC

= 3mA 0.4 V

SINK

0.75 x V

DD

200 mV 10 pF

V

0.35 x V

DD

±1.0

V

FA

9

Audio Subsystem with Mono Class D Speaker and Class H Headphone Amplifiers

I2C TIMING CHARACTERISTICS

(V

= 3.7V, V

PVDD

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Serial-Clock Frequency f

Bus Free Time Between STOP and START Conditions

Hold Time (Repeated) START Condition

MAX97002

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

SDA Transmitting Fall Time t

Setup Time for STOP Condition t Bus Capacitance C

Pulse Width of Suppressed Spike

Note 1: 100% production tested at T Note 2: Amplifier inputs are AC-coupled to GND. Note 3: Class D amplifier testing performed with a resistive load in series with an inductor to simulate an actual speaker load. Note 4: C

is in pF.

B

= 0V. TA = T

GND

to T

MIN

t

HD,STA

t

SU,STA

HD,DAT

SU,DAT

SU,STO

= +25NC. Specifications over temperature limits are guaranteed by design.

A

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

MAX

SCL

t

BUF

0 400 kHz

1.3 Fs

0.6 Fs

LOW

HIGH

1.3 Fs

0.6 Fs

0 900 ns 100 ns

t

R

t

F

(Note 4)

20 +

0.1C

20 +

0.1C

20 +

0.1C

0.6 Fs

B

t

SP

400 pF

0 50 ns

B

300 ns

Figure 1. I

10

CONDITION

SCL

SDA

2

C Interface Timing Diagram

START

28 9

1

CLOCK PULSE FOR

ACKNOWLEDGMENT

NOT ACKNOWLEDGE

ACKNOWLEDGE

Audio Subsystem with Mono Class D

Speaker and Class H Headphone Amplifiers

Typical Operating Characteristics

(V

= V

LDOIN

loads (ZSPK) connected between OUTP and OUTN. Headphone loads (RHP) connected from HPL or HPR to GND. ZSPK = ∞, RHP = ∞.

C

C1P-C1N

6

5

4

3

2

SUPPLY CURRENT (mA)

1

0

2.5 5.5

10

0

-10

-20

-30

-40

-50

-60

HEADPHONE VOLUME ATTENUATION (dB)

-70 0 35

PVDD

= C

= 3.7V, V

HPVDD

= C

GND

HPVSS

= V

= C

PGND

BIAS

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SPEAKER ONLY INPUTS AC-COUPLED TO GND INPUT = INA V

= V

= 3.3V

SDA

SCL

5.04.54.03.53.0

SUPPLY VOLTAGE (V)

HEADPHONE VOLUME ATTENUATION

vs. HP_VOL CODE

RIGHT AND LEFT 32I LOAD

30255 10 15 20

HP_VOL CODE (NUMERIC)

= 0V. Single-ended inputs, preamp gain = 0dB, HPLVOL = HPRVOL = SPKVOL = 0dB. Speaker

= 1μF. TA = +25°C, unless otherwise noted.)

4.0

3.5

MAX97002 toc01

3.0

2.5

2.0

1.5

SHUTDOWN CURRENT (µA)

1.0

0.5

0

2.5 5.5

10

MAX97002 toc04

1

0.1

THD+N (%)

0.01

0.001

0.01 100

SHUTDOWN CURRENT vs. SUPPLY VOLTAGE

INPUTS AC-COUPLED TO GND V

= V

= 3.3V

SDA

SCL

SUPPLY VOLTAGE (V)

THD+N vs. FREQUENCY

V

= 3.7V

PVDD

Z

= 8I + 68µF

SPRK

P

= 600mW

OUT

P

OUT

FREQUENCY (kHz)

MAX97002 toc02

5.04.54.03.53.0

MAX97002 toc05

= 200mW

1010.1

SPEAKER VOLUME ATTENUATION

vs. VOLUME CONTROL CODE

30

8I LOAD

20

10

0

-10

-20

SPEAKER VOLUME ATTENUATION (dB)

-30

-40 0 70

VOLUME CONTROL CODE (NUMERIC)

THD+N vs. FREQUENCY

10

V

= 3.7V

PVDD

Z

= 4I + 33µF

SPRK

1

P

= 1000mW

OUT

0.1

THD+N (%)

P

= 200mW

0.01

0.001

0.01 100 FREQUENCY (kHz)

OUT

605040302010

1010.1

MAX97002

MAX97002 toc03

MAX97002 toc06

10

THD+N vs. FREQUENCY

V

= 3.7V

PVDD

Z

= 8I + 68µF

SPRK

1

0.1

THD+N (%)

SSM

0.01

FFM

0.001

0.01 100 FREQUENCY (kHz)

THD+N vs. OUTPUT POWER

MAX97002 toc08

100

10

THD+N (%)

0.1

0.01

0.001

100

V

= 5.0V

PVDD

Z

= 8I + 68µF

SPRK

10

MAX97002 toc07

fIN = 1kHz

0 400

fIN = 6kHz

fIN = 100Hz

800 1200 1600 2000

P

(mW)

OUT

2400

1

THD+N (%)

0.1

0.01

1010.1

0.001

THD+N vs. OUTPUT POWER

= 5.0V

V

PVDD

Z

= 4I + 33µF

SPRK

1

fIN = 6kHz

fIN = 1kHz

fIN = 100Hz

0 4000

P

(mW)

OUT

350030002500200015001000500

MAX97002 toc09

11

Audio Subsystem with Mono Class D Speaker and Class H Headphone Amplifiers

Typical Operating Characteristics (continued)

(V

= V

LDOIN

loads (ZSPK) connected between OUTP and OUTN. Headphone loads (RHP) connected from HPL or HPR to GND. ZSPK = ∞, RHP = ∞.

C

C1P-C1N

PVDD

= C

= 3.7V, V

HPVDD

= C

GND

HPVSS

= V

= C

= 0V. Single-ended inputs, preamp gain = 0dB, HPLVOL = HPRVOL = SPKVOL = 0dB. Speaker

PGND

= 1μF. TA = +25°C, unless otherwise noted.)

BIAS

100

V

= 4.2V

PVDD

Z

= 8I + 68µF

SPRK

10

MAX97002

THD+N vs. OUTPUT POWER

1

THD+N (%)

0.1

0.01

0.001

100

10

1

THD+N (%)

0.1

0.01

0.001

fIN = 6kHz

fIN = 1kHz

0 1600

P

OUT

THD+N vs. OUTPUT POWER

V

= 3.7V

PVDD

Z

= 4I + 33µF

SPRK

fIN = 6kHz

fIN = 1kHz

0 400

800

P

OUT

fIN = 100Hz

140012001000800600400200

(mW)

f

= 100Hz

IN

1200 1600 2000

(mW)

MAX97002 toc10

MAX97002 toc13

100

V

= 4.2V

PVDD

Z

= 4I + 33µF

SPRK

10

fIN = 1kHz

fIN = 6kHz

fIN = 100Hz

P

(mW)

OUT

1

THD+N (%)

0.1

0.01

0.001

EFFICIENCY vs. OUTPUT POWER

100

Z

= 8I + 68µF

SPRK

90

80

THD+N vs. OUTPUT POWER

70

60

50

40

EFFICIENCY (%)

30

20

10

0

0 2.5

Z

SPRK

P

(W)

OUT

25002000150010005000 3000

= 4I + 33µF

V

= 5.0V

PVDD

fIN = 1kHz

2.01.51.00.5

MAX97002 toc11

MAX97002 toc14

100

V

PVDD

Z

SPRK

10

1

0.01

fIN = 1kHz

0.1

THD+N (%)

0.001

EFFICIENCY vs. OUTPUT POWER

100

Z

SPRK

90

80

70

60

50

40

EFFICIENCY (%)

30

20

10

0

THD+N vs. OUTPUT POWER

= 3.7V

= 8I + 68µF

fIN = 6kHz

fIN = 100Hz

P

(mW)

OUT

= 8I + 68µF

Z

= 4I + 33µF

SPRK

V

PVDD

fIN = 1kHz

P

(W)

OUT

MAX97002 toc12

120010008006004002000

MAX97002 toc15

= 3.7V

1.41.20.8 1.00.4 0.60.20 1.6

OUTPUT POWER vs. SUPPLY VOLTAGE

2.0 fIN = 1kHz

1.8 Z

= 8I + 68µF

SPRK

1.6

1.4

1.2

1.0

0.8

OUTPUT POWER (W)

0.6

0.4

0.2

0

THD+N = 10%

2.5 5.5 SUPPLY VOLTAGE (V)

12

THD+N = 1%

OUTPUT POWER vs. SUPPLY VOLTAGE

3.5 fIN = 1kHz Z

3.0

MAX97002 toc16

2.5

2.0

1.5

OUTPUT POWER (W)

1.0

0.5

5.04.53.0 3.5 4.0

0

= 4I + 33µF

SPRK

THD+N = 10%

THD+N = 1%

2.5 5.5 SUPPLY VOLTAGE (V)

5.04.54.03.53.0

MAX97002 toc17

OUTPUT POWER vs. LOAD RESISTANCE

2.0

1.8

1.6

1.4

1.2

1.0

0.8

OUTPUT POWER (W)

0.6 THD+N = 1%

0.4

0.2

0

LOAD RESISTANCE (I)

V

PVDD

f

= 1kHz

IN

Z

SPRK

THD+N = 10%

= 3.7V

= LOAD + 68µF

100101 1000

MAX97002 toc18