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MAX97000
Technical data
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MAXIM MAX97000 Technical data

19-5004; Rev 1; 6/10
EVALUATION KIT
AVAILABLE
Audio Subsystem with Mono Class D
Speaker and Class H Headphone Amplifier

General Description

The MAX97000 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 four inputs are configurable as two differen­tial inputs or four single-ended inputs.
The entire subsystem is designed for maximum efficiency. The high-efficiency 725mW 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 ground-referenced 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.
All control is performed using the 2-wire, I2C interface. The MAX97000 operates in the extended -40NC to +85NC temperature range, and is available in the 2mm x 2mm, 25-bump WLP package (0.4mm pitch).

Applications

Cell Phones
Portable Multimedia Players

Simplified Block Diagram

Features

S 1.6V to 2.0V Headphone Supply Voltage
S 2.7V to 5.5V Speaker Supply Voltage
S Internal LDO Allows Single-Supply Operation
S 725mW Speaker Output (V
PVDD
= 3.7V, Z
SPK
= 8I
+ 68µH)
S 40mW/Channel Headphone Output (RHP = 16I)
S Low-Emission Class D Amplifier
S Efficient Class H Headphone Amplifier
S Ground-Referenced Headphone Outputs
S Two 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 2mm, 25-Bump 0.4mm Pitch WLP Package

Ordering Information

PART TEMP RANGE PIN-PACKAGE
MAX97000EWA+
+Denotes a lead(Pb)-free/RoHS-compliant package.
-40NC to +85NC
25 WLP
MAX97000
BATTERY
2.7V TO 5.5V
1.8V
POWER SUPPLY
STEREO/
MONO INPUT
STEREO/
MONO INPUT
_______________________________________________________________ Maxim Integrated Products 1
LIMITER
CONTROL
VOLUME
SWITCH
I2C
VOLUME
MAX97000
CLASS D
AMPLIFIER
CLASS H
AMPLIFIER
CHARGE
PUMP
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.
Audio Subsystem with Mono Class D Speaker and Class H Headphone Amplifier

TABLE OF CONTENTS

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Simplified Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
MAX97000
Functional Diagram/Typical Application Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Digital I/O Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
I2C Timing Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Typical Operating Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Detailed Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Signal Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Mixers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Class D Speaker Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
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
I2C Slave Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
I2C Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2
Audio Subsystem with Mono Class D Speaker
and Class H Headphone Amplifier
TABLE OF CONTENTS (CONTINUED)
Mixers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Volume Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Distortion Limiter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Power Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Charge-Pump Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
I2C Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Bit Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
START and STOP Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Early STOP Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Slave Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Write Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Read Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Applications Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Filterless Class D Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
RF Susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Component Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Optional Ferrite Bead Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Input Capacitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Charge-Pump Capacitor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Charge-Pump Flying Capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Charge-Pump Holding Capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Supply Bypassing, Layout, and Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
WLP Applications Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Package Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
MAX97000
3
Audio Subsystem with Mono Class D Speaker and Class H Headphone Amplifier

Functional Diagram/Typical Application Circuit

OPTIONAL
1.6V TO 2.0V
2.5V TO 5.5V
2.7V TO 5.5V
MAX97000
0.47µF
OPTIONAL
0.47µF
OPTIONAL
0.47µF
OPTIONAL
0.47µF
OPTIONAL
INA1
INA2
INB1 D4
INB2 D5
COM1 D2
10µF
PGAINA
-6dB TO +18dB
E4
PGAINA
-6dB TO +18dB
E5
+
PGAINB
-6dB TO +18dB
PGAINB
-6dB TO +18dB
+
1µF 1µF 1µF 10µF
LDOIN
B2
HPLVOL:
-64dB TO +6dB
HPRVOL:
-64dB TO +6dB
SPKVOL:
-30dB TO +20dB
PVDD
C1
CLASS D
PVDD
+12dB
PGND
HPVDD
CLASS H
0/3dB
HPVSS
HPVDD
CLASS H
0/3dB
HPVSS
SPKEN
BIAS
HPLEN
HPREN
THD LIMITER
THDCLP
INADIFF
INBDIFF
VDD
B1
LDO
M U X
LPMODE
M I X
HPLMIX
M I X
HPRMIX
M I X
SPKMIX
ANALOG SWITCHES
C5
BIAS
1µF
HPLB5
HPRA5
E1
OUTP
OUTN
D1
NC1E2
COM2 D3
SDA B3
SCL B4
SHDN
VDD
2
I
C INTERFACE/ SHUTDOWN
C4
C3
GND
SWEN
MAX97000
C2
PGND
A1
C1P
1µF
VDD
CHARGE PUMP
A2
A3
HPVDD HPVSS
C1N
1µF 1µF
NC2E3
A4
4
Audio Subsystem with Mono Class D
Speaker and Class H Headphone Amplifier

ABSOLUTE MAXIMUM RATINGS

(Voltages with respect to GND.)
VDD, HPVDD ........................................................-0.3V to +2.2V
PVDD, LDOIN .......................................................-0.3V to +6.0V
PGND ...................................................................-0.1V to +0.1V
HPVSS .................................................................-2.2V to + 0.3V
C1N .....................................(HPVSS - 0.3V) to (HPVDD + 0.3V)
C1P ..........................................................- 0.3V to (VDD + 0.3V)
HPL, HPR ............................. (HPVSS - 0.3V) to (HPVDD +0.3V)
INA1, INA2, INB1, INB2, BIAS ............................. -0.3V to +6.0V
SDA, SCL, SHDN .................................................-0.3V to +6.0V
COM1, COM2, NC1, NC2,
OUTP, OUTN ......................................-0.3V to (PVDD + 0.3V)
Continuous Current In/Out of PVDD, PGND, OUT_ ...... Q800mA
Continuous Current In/Out of HPR, HPL,
VDD, LDOIN .............................................................. Q140mA
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 HPLVOL = HPRVOL = SPKVOL = 0dB, speaker loads (Z nected from HPL or HPR to GND. SDA and SCL pullup voltage = 1.8V. Z = 1FF. TA = T
LDOIN
= V
PVDD
MIN
= V
to T
= 3.7V, V
SHDN
, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)
MAX
GND
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Speaker Amplifier Supply­Voltage Range
Headphone Amplifier Supply Voltage Range
LDO Input Supply-Voltage Range V
V
PVDD
VDD Guaranteed by PSRR test 1.6 2 V
LDOIN
Quiescent Supply Current
Shutdown Current I
SHDN
Turn-On Time t
Input Resistance R
Feedback Resistance R
= V
= 0V. Input signal applied at INA configured single-ended, preamp gain = 0dB,
PGND
SPK
Guaranteed by PSRR test 2.7 5.5 V
Guaranteed by PSRR test 2.5 5.5 V
Low-power mode, TA = +25NC, LPMODE = 0x01
HP mode, TA = +25NC, stereo SE input on INA, INB disabled
SPK mode, TA = +25NC mono differential input on INB, INA disabled
SPK + HP mode, TA = +25NC stereo SE input on INA, INB disabled
TA = +25NC, internal gain, software
TA = +25NC, internal gain, I hardware
Time from power-on to full operation
ON
including soft-start
TA = +25NC,
IN
internal gain
TA = +25NC, external gain
F
Continuous Current In/Out of COM1,
COM2, NC1, NC2 ...................................................... Q150mA
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 VDD ..........Continuous
Continuous Power Dissipation (TA = +70NC) Multilayer Board
25 WLP (derate 19.2mW/NC above +70NC) ................850mW
Junction Temperature .....................................................+150NC
Operating Temperature Range .......................... -40NC to +85NC
Storage Temperature Range ............................ -65NC to +150NC
Soldering Temperature (reflows) .....................................+260NC
) connected between OUTP and OUTN. Headphone loads (RHP) con-
= J, RHP = J. C
SPK
I
LDOIN
I
PVDD
I
LDOIN
I
PVDD
I
LDOIN
I
PVDD
I
LDOIN
I
PVDD
I
PVDD
I
LDOIN
+ I
PVDD
LDOIN
C1P-C1N
,
= C
HPVDD
1.45 2
0.4 0.7
1.45 2
0.79 1.2
0.42 0.75
1.38 2.2
1.45 2
1.8 2.7 90 175 60 110
= C
HPVSS
1
= C
mA
FA
BIAS
8 ms
Gain = -6dB, -3dB 41.2 Gain = 0dB to +9dB 16 20.6 27
kI
Gain = +18dB 5.5 7.2 9.5
19 20 21
kI
MAX97000
5
Audio Subsystem with Mono Class D Speaker and Class H Headphone Amplifier
ELECTRICAL CHARACTERISTICS (continued)
(V HPLVOL = HPRVOL= SPKVOL = 0dB, speaker loads (Z nected from HPL or HPR to GND. SDA and SCL pullup voltage = 1.8V. Z = 1FF. TA = T
MAX97000
LDOIN
= V
PVDD
MIN
= V
to T
= 3.7V, V
SHDN
, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)
MAX
GND
= V
= 0V. Input signal applied at INA configured single-ended, preamp gain = 0dB,
PGND
) connected between OUTP and OUTN. Headphone loads (RHP) con-
SPK
= J, RHP = J. C
SPK
C1P-C1N
= C
HPVDD
= C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Preamp = 0dB 2.3
Maximum Input Signal Swing
Common-Mode Rejection Ratio CMRR
Preamp = +18dB 0.29 Preamp = external gain 2.3 x R
f = 1kHz (differential input mode)
Gain = 0dB 55 Gain = +18dB 32
IN,EX/RF
Input DC Voltage IN__ inputs 1.125 1.2 1.275 V Bias Voltage V
BIAS
1.13 1.2 1.27 V
SPEAKER AMPLIFIER
TA = +25NC, SPKM = 1 Q0.5 Q4
Output Offset Voltage V
Click-and-Pop Level K
Power-Supply Rejection Ratio
Output Power
Total Harmonic Distortion + Noise
Signal-to-Noise Ratio SNR
Oscillator Frequency f Spread-Spectrum Bandwidth
OS
CP
PSRR
THD+N
OSC
TA = +25NC, SPKVOL = 0dB, SPKMIX = 0x01, IN_DIFF = 0V
Peak voltage, TA = +25NC, A-weighted,
Into shutdown -70
32 samples per second, volume at mute (Note 2)
Out of shutdown -70
V
= 2.7V to 5.5V 50 75
PVDD
f = 217Hz,
TA = +25NC (Note 2)
V
f = 1kHz, V
RIPPLR
RIPPLR
= 200mV
= 200mV
P-P
P-P
f = 20kHz,
THD+N P 1%, f = 1kHz, Z
= 8I + 68FH
SPK
(Note 3) f = 1kHz, P
Z
= 8I + 68FH
SPK
= 360mW, TA = +25NC,
OUT
A-weighted, SPKMIX = 0x03, referenced to 725mW
V
V V
V
IN_DIFF = 0 (single-ended)
IN_DIFF = 1 (differential) 93
= 200mV
RIPPLR
= 4.2V 930
PVDD
= 3.7V 725
PVDD
= 3.3V 562
PVDD
P-P
Q1.5
65
65
59
0.05 0.6 %
93
250 kHz
Q20 Gain 11.5 12 12.5 dB Current Limit 1.5 A Efficiency
Output Noise
E P
= 725mW, f = 1kHz, Z
OUT
SPK
A-weighted, (SPKMIX = 0x01), IN_DIFF = 1, SPKVOL = 0dB
= 8I + 68FH
87 %
50
HPVSS
= C
V
dB
mV
dBV
dB
mW
dB
kHz
FV
BIAS
P-P
RMS
6
Audio Subsystem with Mono Class D
Speaker and Class H Headphone Amplifier
ELECTRICAL CHARACTERISTICS (continued)
(V
LDOIN
= V
PVDD
HPLVOL = HPRVOL= SPKVOL = 0dB, speaker loads (Z nected from HPL or HPR to GND. SDA and SCL pullup voltage = 1.8V. Z = 1FF. TA = T
MIN
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
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
Click-and-Pop Level
Power-Supply Rejection Ratio
Output Power P
Channel-to-Channel Gain Tracking
= V
to T
= 3.7V, V
SHDN
, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)
MAX
GND
HPVDD
HPVSS
V
TH1
V
TH2
= V
= 0V. Input signal applied at INA configured single-ended, preamp gain = 0dB,
PGND
) connected between OUTP and OUTN. Headphone loads (RHP) con-
SPK
V
V V V V V
HPL
HPL
HPL
HPL
HPL
HPL
HPL
= V = V = V , V , V , V , V
= 0V 80 83 85
HPR
= 0.2V 665
HPR
= 0.5V 500
HPR
> V
HPR
HPR
HPR
HPR
< V > V < V
TH
TH
TH
TH
Output voltage at which the charge pump switches between fast and slow clock
Output voltage at which the charge pump switches modes, V
rising or falling
OUT
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
TA = +25NC volume at mute Q0.15 Q0.6
V
OS
TA = +25NC, HP_VOL = 0dB, HP_MIX = 0x1, IN_DIFF = 0
Peak voltage, TA = +25NC, A-weighted, 32
K
samples per second,
CP
volume at mute (Note 2)
Into shutdown -74
Out of shutdown -74
V
LDOIN
f = 217Hz, V
RIPPLE
PSRR
TA = +25NC (Note 2)
f = 1kHz, V
RIPPLE
f = 20kHz, V
RIPPLE
RHP = 16I
RHP = 32I RHP = 32I,
OUT
THD+N = 1%, f = 1kHz
LPMODE = 1, LP gain = 3dB
TA = +25NC, HPL to HPR, volume at maximum, HPLMIX = 0x01, HPRMIX = 0x02, IN_DIFF = 0
= J, RHP = J. C
SPK
C1P-C1N
0.1 0.16 0.21
0.40 0.46 0.52
= 2.5V to 5.5V 70 85
= 200mV
= 200mV
= 200mV
P-P
P-P
P-P
= C
HPVDD
= C
HPVSS
1.8
0.9
-1.8
-0.9
32 ms
20
Q0.5
84
80
62
40
23
34
Q0.3 Q2.5
= C
kHzV
mV
dBV
mW
V
V
V
Fs
dB
%
BIAS
MAX97000
7
Audio Subsystem with Mono Class D Speaker and Class H Headphone Amplifier
ELECTRICAL CHARACTERISTICS (continued)
(V HPLVOL = HPRVOL= SPKVOL = 0dB, speaker loads (Z nected from HPL or HPR to GND. SDA and SCL pullup voltage = 1.8V. Z = 1FF. TA = T
MAX97000
= V
LDOIN
Total Harmonic Distortion + Noise
Signal-to-Noise Ratio SNR
Slew Rate SR 0.35 Capacitive Drive C Crosstalk HPL to HPR, HPR to HPL, f = 20Hz to 20kHz 65 dB
ANALOG SWITCH
On-Resistance R
= V
PVDD
to T
MIN
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
= 3.7V, V
SHDN
, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)
MAX
GND
THD+N
L
ON
= V
= 0V. Input signal applied at INA configured single-ended, preamp gain = 0dB,
PGND
) connected between OUTP and OUTN. Headphone loads (RHP) con-
SPK
= J, RHP = J. C
SPK
P
= 10mW,
OUT
f = 1kHz
A-weighted, RHP = 16I, HPLMIX = 0x01, HPRMIX = 0x02, IN_DIFF = 0
I
= 20mA, V
NC_
= 0V and PVDD, SWEN = 1
COM_
RHP = 32I RHP = 16I
TA = +25NC
TA = T
MIN
to T
MAX
C1P-C1N
= C
0.02
0.03 0.1
100 dB
200 pF
1.6 4
HPVDD
= C
HPVSS
5.2
= C
V/Fs
%
I
BIAS
V
DIFCOM_
Total Harmonic Distortion + Noise
Off-Isolation
PREAMPLIFIER
Gain
VOLUME CONTROL
Volume Level
Mute Attenuation f = 1kHz
Zero-Crossing Detection Timeout
LIMITER
Attack Time 1 ms
Release Time Constant
V
CMCOM_
f = 1kHz, SWEN = 1, Z
SPK
SWEN = 0, COM1 and COM2 to GND = 50I, f = 10kHz, referred to signal applied to NC1 and NC2
PGAIN_ = 000 -6.5 -6 -5.5 PGAIN_ = 001 -3.5 -3 -2.5 PGAIN_ = 010 -0.5 0 0.5 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
THDT1 = 0 1.4 THDT1 = 1 2.8
= 2V
P-P
= PVDD/2,
= 8I + 68FH
10I in series with
,
each switch
No series resistors 0.3
Speaker 109 Headphone 101
0.05 %
105 dB
dB
dB
dB
100 ms
s
8
Audio Subsystem with Mono Class D
Speaker and Class H Headphone Amplifier

DIGITAL I/O CHARACTERISTICS

(V TA = +25NC.) (Note 1)

I2C TIMING CHARACTERISTICS

(V TA = +25NC.) (Note 1)
Note 1: 100% production tested at TA = +25NC. Specifications overtemperature limits are guaranteed by design. 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: CB is in pF.
LDOIN
= V
PVDD
= V
SHDN
= 3.7V, V
GND
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DIGITAL INPUTS (SDA, SCL, SHDN)
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
LDOIN
= V
PVDD
= V
SHDN
= 3.7V, V
GND
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
t
t
HD,STA
LOW
HIGH
t
SU,STA
HD,DAT
SU,DAT
SDA and SCL Receiving Rise Time
SDA and SCL Receiving Fall Time t
SDA Transmitting Fall Time t
Setup Time for STOP Condition t
SU,STO
Bus Capacitance C Pulse Width of Suppressed Spike t
IH
IL
HYS
IN
IN
OL
SCL
BUF
t
R
F
F
SP
= V
= 0V. TA = T
PGND
MIN
to T
, unless otherwise noted. Typical values are at
MAX
1.3 V
TA = +25NC Q1.0 V
= 0, TA = +25NC Q1.0
LDOIN
I
= 3mA 0.4 V
SINK
= V
= 0V. TA = T
PGND
MIN
to T
, unless otherwise noted. Typical values are at
MAX
0 400 kHz
1.3
0.6
1.3
0.6
0.6
0 900 ns
100 ns
(Note 4)
(Note 4)
(Note 4)
20 +
0.1C
20 +
0.1C
20 +
0.1C
B
B
B
0.6
B
0 50 ns
0.5 V
200 mV
10 pF
300 ns
300 ns
300 ns
400 pF
MAX97000
FA
Fs
Fs
Fs Fs
Fs
Fs
9
Audio Subsystem with Mono Class D Speaker and Class H Headphone Amplifier
SDA
t
BUF
t
LOW
t
SU,DAT
t
HD,DAT
t
SU,STA
t
HD,STA
t
SP
t
SU,STO
SCL
MAX97000
t
HD,STA
START CONDITION
t
HIGH
t
t
R
F
REPEATED START CONDITION
STOP
CONDITION
START
CONDITION
Figure 1. I2C Interface Timing Diagram

Typical Operating Characteristics

(V loads (Z
C
LDOIN
C1P-C1N
= V
SPK
PVDD
= 3.7V, V
GND
= V
= 0V. Single-ended inputs, preamp gain = 0dB, HPLVOL = HPRVOL = SPKVOL = 0dB. Speaker
PGND
) connected between OUTP and OUTN. Headphone loads (RHP) connected from HPL or HPR to GND. Z
= C
HPVDD
= C
HPVSS
= C
= 1μF. TA = +25°C, unless otherwise noted.)
BIAS
= ∞, RHP = ∞.
SPK
GENERAL
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
3.0 SPEAKER ONLY INPUTS AC-COUPLED TO GND
2.5 INA CONNECTED TO OUTPUT
2.0
1.5
1.0
SUPPLY CURRENT (mA)
0.5
0
2.5 5.5 SUPPLY VOLTAGE (V)
4.5
4.0
MAX97000 toc01
5.04.54.03.53.0
3.5
3.0
2.5
2.0
1.5
SHUTDOWN CURRENT (µA)
1.0
0.5
0
2.5 5.5
SHUTDOWN CURRENT vs. SUPPLY VOLTAGE
INPUTS AC-COUPLED TO GND
SOFTWARE
SUPPLY VOLTAGE (V)
MAX97000 toc02
HARDWARE
5.04.54.03.53.0
10
Audio Subsystem with Mono Class D
Speaker and Class H Headphone Amplifier
Typical Operating Characteristics (continued)
(V
LDOIN
loads (Z
C
C1P-C1N
= V
SPK
PVDD
= 3.7V, V
GND
= V
= 0V. Single-ended inputs, preamp gain = 0dB, HPLVOL = HPRVOL = SPKVOL = 0dB. Speaker
PGND
) connected between OUTP and OUTN. Headphone loads (RHP) connected from HPL or HPR to GND. Z
= C
HPVDD
= C
HPVSS
= C
= 1μF. TA = +25°C, unless otherwise noted.)
BIAS
SPEAKER AMPLIFIER
= ∞, RHP = ∞.
SPK
MAX97000
10
V
= 3.7V
PVDD
Z
= 8I + 68µF
SPRK
1
P
= 500mW
OUT
0.1
THD+N (%)
P
= 200mW
0.01
0.001
0.01 100 FREQUENCY (kHz)
OUT
THD+N vs. OUTPUT POWER
100
V
= 5.0V
PVDD
Z
= 8I + 68µF
SPRK
10
THD+N vs. FREQUENCY
1
THD+N (%)
0.1
0.01
0.001
fIN = 6kHz
fIN = 1kHz
fIN = 100Hz
0 2.5
P
(mW)
OUT
10
V
= 3.7V
PVDD
Z
= 4I + 33µF
MAX97000 toc03
THD+N (%)
1010.1
SPRK
1
P
= 1000mW
OUT
0.1
P
= 200mW
0.01
0.001
0.01 100 FREQUENCY (kHz)
OUT
1010.1
MAX97000 toc04
10
1
0.1
THD+N (%)
0.01
0.001
0.01 100
THD+N vs. OUTPUT POWER
THD+N vs. FREQUENCY
100
V
= 5.0V
PVDD
Z
= 4I + 33µF
MAX97000 toc06
THD+N (%)
2.01.51.00.5
SPRK
10
1
0.1
0.01
0.001
fIN = 6kHz
fIN = 1kHz
fIN = 100Hz
0 4.0
P
(mW)
OUT
3.53.02.52.01.51.00.5
MAX97000 toc07
100
10
1
THD+N (%)
0.1
0.01
0.001
THD+N vs. FREQUENCY
V
= 3.7V
PVDD
Z
= 8I + 68µF
SPRK
SSM
FFM
1010.1
FREQUENCY (kHz)
THD+N vs. OUTPUT POWER
V
= 4.2V
PVDD
Z
= 8I + 68µF
SPRK
fIN = 6kHz
fIN = 1kHz
fIN = 100Hz
0 1.6
P
(mW)
OUT
1.41.21.00.80.60.40.2
MAX97000 toc05
MAX97000 toc08
100
10
1
THD+N (%)
0.1
0.01
0.001
THD+N vs. OUTPUT POWER
V
= 4.2V
PVDD
Z
= 4I + 33µF
SPRK
fIN = 6kHz
fIN = 1kHz
fIN = 100Hz
P
(mW)
OUT
2.52.01.51.00.50 3.0
MAX97000 toc09
100
10
1
THD+N (%)
0.1
0.01
0.001
THD+N vs. OUTPUT POWER
V
= 3.7V
PVDD
Z
= 8I + 68µF
SPRK
fIN = 6kHz
fIN = 1kHz
fIN = 100Hz
P
(mW)
OUT
1.21.00.80.60.40.20 1.4
MAX97000 toc10
100
THD+N vs. OUTPUT POWER
V
= 3.7V
PVDD
Z
= 4I + 33µF
SPRK
10
fIN = 6kHz
1
fIN = 1kHz
THD+N (%)
0.1
0.01
0.001 0 2.5
fIN = 100Hz
P
(mW)
OUT
MAX97000 toc11
2.01.51.00.5
11
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