MAX9796EBX+TG45 Fast Delivery |IC PHOENIX CO.,LIMITED

MAX9796EBX+TG45 ,2.3W, High-Power Class D Audio Subsystem with DirectDrive Headphone AmplifiersBlock Diagram CPV C1P CPGND C1N CPV HPLDD SSASINGLE SUPPLY 2.7V TO 5.5VPV I.C. VBIAS VDD INC1 SS HP ..
MAX98089ETN+ ,Audio Codec with FlexSound Processorfeatures a mono differential amplifier that can Automatic Level Control (ALC) also be configured as ..
MAX9812HEXT+T ,Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain Microphone Amplifiers with Integrated BiasBlock DiagramsV VCC CCSHDN SHDNREFERENCE REFERENCEBIAS BIAS2.3V (L VERSION) 2.3V (L VERSION)4.0V (H ..
MAX9812LEXT+T ,Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain Microphone Amplifiers with Integrated Biasapplications such♦ Low 0.015% THD+Nas notebook computers, cell phones, and PDAs. These♦ Available i ..
MAX9812LEXT-T ,Tiny / Low-Cost / Single/Dual-Input / Fixed-Gain Microphone Amplifiers with Integrated Biasfeatures include very low 230µA supply current and a Internal Low-Noise Microphone Bias Supplytota ..
MAX9813LEKA-T ,Tiny / Low-Cost / Single/Dual-Input / Fixed-Gain Microphone Amplifiers with Integrated BiasELECTRICAL CHARACTERISTICS(V = 3.3V, I = 500µA (MAX9812L/MAX9813L), V = 5V, I = 800µA (MAX9812H/MAX ..
MB89475 ,F2MC-8L/Low Power/Low Voltage Microcontrollersapplications forconsumer product.2* : F MC stands for FUJITSU Flexible Microcontroller.n
MB89535A ,F2MC-8L/Low Power/Low Voltage MicrocontrollersFUJITSU SEMICONDUCTORDS07-12547-4EDATA SHEET8-bit Original Microcontroller CMOS2F MC-8L MB89530A Se ..
MB89535A ,F2MC-8L/Low Power/Low Voltage MicrocontrollersFEATURES• Wide range of package options• Two types of QFP packages (1 mm pitch, 0.65 mm pitch) • LQ ..
MB89537A , 8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series
MB89537A , 8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series
MB89537AC , 8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series

MAX9796EBX+TG45
2.3W, High-Power Class D Audio Subsystem with DirectDrive Headphone Amplifiers
General Description
The MAX9796 combines a high-efficiency Class D, mono
audio power amplifier with a mono DirectDrive™ receiver
amplifier and a stereo DirectDrive headphone amplifier.
Maxim’s 3rd-generation, ultra-low EMI, Class D audio
power amplifiers provide Class AB performance with
Class D efficiency. The MAX9796 delivers 2.3W into a 4Ω
load from a 5V supply and offers efficiencies up to 80%.
Active emissions limiting circuitry and spread-spectrum
modulation greatly reduce EMI, eliminating the need for
output filtering found in traditional Class D devices.
The MAX9796 features a fully differential architecture, a
full-bridged output, and comprehensive click-and-pop
suppression. The device utilizes a flexible, user-defined
mixer architecture that includes an input mixer, volume
control, and output mixer. All controls are done through
an I2C interface.
The mono receiver amplifier and stereo headphone
amplifier use Maxim’s DirectDrive architecture, that pro-
duces a ground-referenced output from a single supply,
eliminating the need for large DC-blocking capacitors,
saving cost, space, and component height.
The MAX9796 is available in a 36-bump UCSP™ (3mm
x 3mm) package and is specified over the extended
-40°C to +85°C temperature range.
Applications
Cell Phones
Portable Multimedia Players
Handheld Gaming Consoles
FeaturesUnique Spread-Spectrum Modulation and ActiveEmissions Limiting Significantly Reduces EMIUp to 3 Stereo Inputs2.3W Mono Speaker Output (4Ω, VDD= 5V)50mW Mono Receiver/Stereo Headphone Outputs(32Ω, VDD= 3.3V)High PSRR (68dB at 217Hz)80% Efficiency (VDD= 3.3V, RL= 8Ω, POUT=600mW)I2C Control—Input Configuration, VolumeControl, Output ModeClick-and-Pop SuppressionLow Total Harmonic Distortion (0.03% at 1kHz)Current-Limit and Thermal ProtectionAvailable in Space-Saving, 36-Bump UCSP
(3mm x 3mm)
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
Ordering Information
MAX9796
MIXER/
MUX
GAIN
CONTROL
I2C
INTERFACE
SINGLE SUPPLY 2.7V TO 5.5V
PARTTEMP RANGEPIN-
PACKAGE
PKG
CODE
MAX9796EBX+T-40°C to +85°C36 UCSP-36*B36-4
Simplified Block Diagram
MAX9796
C1PCPGNDC1NCPVDD4
OUT+SDA
PGNDSCL
UCSP
PVDDOUT-PGNDOUT+
CPVSSHPL
I.C.VBIASINC1PVDDVSSHPR
INC2OUTRx
INB2VDD
PVDDGND
OUT-SHDNINA1INA2INB1I.C.
TOP VIEW
(BUMPS ON BOTTOM)
Pin Configuration
19-0866; Rev 1; 1/08
EVALUATION KIT
AVAILABLE
+Denotes a lead-free package.
*Four center bumps depopulated.
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VDD= PVDD= CPVDD= 3.3V, GND = PGND = CPGND = 0V, SHDN= VDD, I2C settings (INA gain = +20dB, INB gain = INC gain =
0dB, volume setting = 0dB, mono path gain = 0dB, SHDN= 1, SSM = 1). Speaker load resistors (RLSP) are terminated between
OUT+ and OUT-, headphone load resistors are terminated to GND, unless otherwise noted. C1 = C2 = C3 = 1µF. TA= TMINto TMAX,
unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
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.
VDDto GND...........................................................................+6V
PVDDto PGND.......................................................................+6V
CPVDDto CPGND..................................................................+6V
CPVSSto CPGND.....................................................-6V to +0.3V
VSSto CPGND..........................................................-6V to +0.3V
C1N.......................................(CPVSS- 0.3V) to (CPGND + 0.3V)
C1P.......................................(CPGND - 0.3V) to (CPVDD+ 0.3V)
HPL, HPR to GND...................(CPVSS- 0.3V) to (CPVDD+ 0.3V)
GND to PGND and CPGND................................................±0.3V
VDDto PVDDand CPVDD....................................................±0.3V
SDA, SCL to GND.....................................................-0.3V to +6V
All other pins to GND..................................-0.3V to (VDD+ 0.3V)
Continuous Current In/Out of PVDD, PGND, CPVDD, CPGND,
OUT_ _, HPR, and HPL................................................±800mA
Continuous Input Current CPVSS....................................+260mA
Continuous Input Current (all other pins).........................±20mA
Duration of Short Circuit Between
OUT+ and OUT-......................................................Continuous
Duration of HP_ OUT_ Short Circuit to
GND or PVDD..........................................................Continuous
Continuous Power Dissipation (TA= +70°C)
36-Bump (3mm x 3mm) UCSP Multilayer Board
(derate 17.0mW/°C above +70°C)...........................1360.5mW
Junction Temperature......................................................+150°C
Operating Temperature Range...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
GENERAL
Supply Voltage Range
VDD,
PVDD,
CPVDD
Inferred from PSRR test2.75.5V
Output mode 1, 6, 11 (Rx mode)6.310
Output mode 4, 9, 14 (HP mode)812.6
Output mode 2, 7, 12 (SP mode)11.817.5Quiescent CurrentIDD
Output mode 3, 8, 13 (SP and HP modes)15.121
Mute CurrentIMUTECurrent in mute4.710mA
Hard shutdownSHDN = GND0.110
Shutdown CurrentISHDNSoft shutdownSee the I2C Interface
section8.515µA
Turn-On TimetONTime from shutdown or power-on to full
operation30ms
B and C pair inputs, TA = +25°C,
VOL = max17.52841.0kΩInput ResistanceRIN
A pair inputs, TA = +25°C, +20dB3.55.58.0kΩ
Common-Mode Rejection RatioCMRRTA = +25°C, VIN = ±500mV4550dB
Input DC Bias VoltageVBIASIN_ inputs1.121.251.38V
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
SPEAKER AMPLIFIER
TA = +25°C±5.5±23.5Output Offset VoltageVOSTMIN ≤ TA ≤ TMAX±40mV
Into shutdown-62
Out of shutdown-60
Into mute-63Click-and-Pop LevelKCP
Peak voltage, TA =
+25°C, A-weighted,
32 samples per
second (Notes 3, 4)Out of mute-62
VDD = 2.7V to 5.5V4870
f = 217Hz, 100mVP-P
ripple68
f = 1kHz, 100mVP-P
ripple60
Power-Supply Rejection Ratio
(Note 3)PSRRTA = +25°C
f = 20kHz, 100mVP-P
ripple50
RL = 4Ω, VDD = 5V,
f = 1kHz2300
RL = 8Ω, VDD = 3.3V,
f = 1kHz600Output Power (Note 4)POUTTHD+N = 1%,
TA = +25°C
RL = 8Ω, VDD = 5V,
f = 1kHz1300
Current Limit1.6A
RL = 8Ω,
POUT = 800mW0.03
Total Harmonic Distortion Plus
Noise (Note 4)THD+Nf = 1kHz
RL = 4Ω,
POUT = 830mW0.04
BW = 20Hz to 20kHz81Signal-to-Noise RatioSNRVOUT = 1.8VRMS,
RL = 8Ω (Note 3)
A-weighted84
Fixed-frequency modulation (SSM = 0)1100
Output FrequencyfOSCSpread-spectrum modulation (SSM = 1)1100
±30
kHz
EfficiencyηPOUT = 470mW, f = 1kHz both channel
driven, L = 68µH in series with 8Ω load80%
GainAV12dB
ELECTRICAL CHARACTERISTICS (continued)
(VDD= PVDD= CPVDD= 3.3V, GND = PGND = CPGND = 0V, SHDN= VDD, I2C settings (INA gain = +20dB, INB gain = INC gain =
0dB, volume setting = 0dB, mono path gain = 0dB, SHDN= 1, SSM = 1). Speaker load resistors (RLSP) are terminated between
OUT+ and OUT-, headphone load resistors are terminated to GND, unless otherwise noted. C1 = C2 = C3 = 1µF. TA= TMINto TMAX,
unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
ELECTRICAL CHARACTERISTICS (continued)
(VDD= PVDD= CPVDD= 3.3V, GND = PGND = CPGND = 0V, SHDN= VDD, I2C settings (INA gain = +20dB, INB gain = INC gain =
0dB, volume setting = 0dB, mono path gain = 0dB, SHDN= 1, SSM = 1). Speaker load resistors (RLSP) are terminated between
OUT+ and OUT-, headphone load resistors are terminated to GND, unless otherwise noted. C1 = C2 = C3 = 1µF. TA= TMINto TMAX,
unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
RECEIVER AMPLIFIER
Output Offset VoltageVOSTA = +25°C±1.8mV
Into shutdown-62
Into mute-67
Out of shutdown-63Click-and-Pop LevelKCP
Peak voltage, TA =
+25°C, A-weighted,
32 samples per
second (Notes 3, 5)Out of mute-66
VDD = 2.7V to 5.5V5880
f = 217Hz, 100mVP-P
ripple80
f = 1kHz, 100mVP-P
ripple70
Power-Supply Rejection Ratio
(Note 3)PSRRTA = +25°C
f = 20kHz, 100mVP-P
ripple62
RL = 16Ω60Output PowerPOUTTA = +25°C,
THD+N = 1%RL = 32Ω50mW
GainAV3dB
RL = 16Ω (VOUT = 800mVRMS, f = 1kHz)0.03Total Harmonic Distortion Plus
NoiseTHD+NRL = 32Ω (VOUT = 800mVRMS, f = 1kHz)0.024%
BW = 20Hz to 20kHz87Signal-to-Noise RatioSNRRL = 16Ω, VOUT =
800mVRMS (Note 3)A-weighted89dB
Slew RateSR0.3V/µs
Capacitive DriveCL300pF
HEADPHONE AMPLIFIERS
Output Offset VoltageVOSTA = +25°C±1.8mV
Into shutdown-61
Into mute-65
Out of shutdown-60Click-and-Pop LevelKCP
Peak voltage, TA =
+25°C, A-weighted,
32 samples per
second (Notes 2, 5)Out of mute-64
Contact±4ESD ProtectionHP_Air±8kV
VDD = 2.7V to 5.5V5880
f = 217Hz, 100mVP-P
ripple80
f = 1kHz, 100mVP-P
ripple70
Power-Supply Rejection Ratio
(Note 3)PSRRTA = +25°C
f = 20kHz, 100mVP-P
ripple62
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
ELECTRICAL CHARACTERISTICS (continued)
(VDD= PVDD= CPVDD= 3.3V, GND = PGND = CPGND = 0V, SHDN= VDD, I2C settings (INA gain = +20dB, INB gain = INC gain =
0dB, volume setting = 0dB, mono path gain = 0dB, SHDN= 1, SSM = 1). Speaker load resistors (RLSP) are terminated between
OUT+ and OUT-, headphone load resistors are terminated to GND, unless otherwise noted. C1 = C2 = C3 = 1µF. TA= TMINto TMAX,
unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
RL = 16Ω60Output PowerPOUTTA = +25°C,
THD+N = 1%RL = 32Ω50mW
Current Limit170mA
GainAV+3dB
Channel-to-Channel Gain
TrackingTA = +25°C±1%
RL = 16Ω (VOUT = 800mVRMS, f = 1kHz)0.03Total Harmonic Distortion Plus
NoiseTHD+NRL = 32Ω (VOUT = 800mVRMS, f = 1kHz)0.024%
BW = 20Hz to 20kHz92Signal-to-Noise RatioSNRRL = 16Ω, VOUT =
800mVRMSA-weighted93dB
Slew RateSR0.3V/µs
Capacitive DriveCL300pF
CrosstalkL to R, R to L, f = 10kHz, RL = 16Ω,
VOUT = 160mVRMS75dB
VOLUME CONTROL
HP gain (max)3
SP gain (max)12
HP gain (min)-72
IN+6dB = 0
(minimum gain
setting)
SP gain (min)-63
HP gain (max)9
SP gain (max)18
HP gain (min)-61
Volume Control
IN+6dB = 1
(maximum gain
setting)
SP gain (min)-57
Mono + 6dB = 00Mono GainAll outputsMono + 6dB = 16dB
INA+20dB = 0 (minimum gain setting)Set by IN+6dBInput Pair A ControlINA+20dB = 1 (maximum gain setting)20dB
Mute Attenuation (Minimum
Volume)VIN = 1VRMS80dB
DIGITAL INPUTS (SHDN, SDA, SCL)
Input-Voltage HighVIH1.4V
Input-Voltage LowVIL0.4V
Input Hysteresis (SDA, SCL)VHYS200mV
SDA, SCL Input CapacitanceCIN10pF
Input Leakage CurrentIIN1.0µA
Pulse Width of Spike SuppressedtSP50ns
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
ELECTRICAL CHARACTERISTICS (continued)
(VDD= PVDD= CPVDD= 3.3V, GND = PGND = CPGND = 0V, SHDN= VDD, I2C settings (INA gain = +20dB, INB gain = INC gain =
0dB, volume setting = 0dB, mono path gain = 0dB, SHDN= 1, SSM = 1). Speaker load resistors (RLSP) are terminated between
OUT+ and OUT-, headphone load resistors are terminated to GND, unless otherwise noted. C1 = C2 = C3 = 1µF. TA= TMINto TMAX,
unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
DIGITAL OUTPUTS (SDA Open Drain)
Output Low Voltage SDAVOLISINK = 6mA0.4V
Output Fall Time SDAtOFVH(MIN) to VL(MAX) bus capacitance = 10pF
to 400pF, ISINK = 3mA250ns
I2C INTERFACE TIMING
Serial-Clock FrequencyfSCLDC400kHz
Bus Free Time Between STOP
and START ConditionstBUF1.3µs
START Condition HoldtHD:STA0.6µs
STOP Condition Setup TimetSU:STA0.6µs
Clock Low PeriodtLOW1.3µs
Clock High PeriodtHIGH0.6µs
Data Setup TimetSU:DAT100ns
Data Hold TimetHD:DAT0900ns
Maximum Receive SCL/SDA Rise
TimetR300ns
Maximum Receive SCL/SDA Fall
TimetF300ns
Setup Time for STOP ConditiontSU:STO0.6µs
Capacitive Load for Each Bus
LineCb400pF
Note 1:All devices are 100% production tested at room temperature. All temperature limits are guaranteed by design.
Note 2:Measured at headphone outputs.
Note 3:Amplifier inputs AC-coupled to GND.
Note 4:Testing performed with a resistive load in series with an inductor to simulate an actual speaker load. For RL= 8ΩL = 68µH,
RL = 4ΩL = 47µH.
Note 5:Testing performed at room temperature with an 8Ωresistive load in series with 68µH inductive load connected across BTL
outputs for speaker amplifier. Testing performed with 32Ωresistive load connected between OUT_ and GND for headphone
amplifier. Testing performed with a 32Ωresistive load connected between OUTRx and GND for mono receiver amplifier.
Mode transitions are controlled by SHDNpin.
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9796 toc01
FREQUENCY (Hz)
THD+N (%)
10k1k100
0.001100k
POUT = 1W
POUT = 1.6W
VDD = 5V
RL = 4Ω
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9796 toc02
FREQUENCY (Hz)
THD+N (%)
10k1k100
0.001100k
POUT = 500mW
POUT = 750mW
VDD = 5V
RL = 8Ω
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9796 toc03
FREQUENCY (Hz)
THD+N (%)
10k1k100
0.001100k
POUT = 350mW
POUT = 800mW
VDD = 3.3V
RL = 4Ω
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9796 toc04
FREQUENCY (Hz)
THD+N (%)
10k1k100
0.001100k
POUT = 200mW
POUT = 450mW
VDD = 3.3V
RL = 8Ω
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9796 toc05
FREQUENCY (Hz)
THD+N (%)
10k1k100
0.001100k
SSM
FFM
VDD = 5V
RL = 8Ω
POUT = 500mW
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9796 toc06
OUTPUT POWER (W)
THD+N (%)
20Hz
10kHz
1kHz
VDD = 5V
RL = 4Ω
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9796 toc08
THD+N (%)
VDD = 3.3V
RL = 4Ω
20Hz
10kHz
1kHz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9796 toc07
THD+N (%)
VDD = 5V
RL = 8Ω
20Hz
10kHz
1kHz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9796 toc09
THD+N (%)
20Hz
10kHz
1kHz
VDD = 3.3V
RL = 8Ω
Typical Operating Characteristics
(VDD= PVDD= CPVDD= 3.3V, GND = PGND = CPGND = 0V, SHDN= VDD, I2C settings (INA gain = +20dB, INB gain = INC gain =
0dB, volume setting = 0dB, mono path gain = 0dB, SHDN= 1, SSM = 1). C1 = C2 = C3 = 1µF. Speaker load resistors (RLSP) are ter-
minated between OUT+ and OUT-, headphone load resistors are terminated to GND, unless otherwise noted.)
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
EFFICIENCY
vs. OUTPUT POWER
MAX9796 toc10
OUTPUT POWER (W)
EFFICIENCY (%)1
RL = 8Ω
RL = 4Ω
VDD = 5V
f = 1kHz
EFFICIENCY
vs. OUTPUT POWER
MAX9796 toc11
OUTPUT POWER (W)
EFFICIENCY (%)
RL = 8Ω
RL = 4Ω
VDD = 3.3V
f = 1kHz
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX9796 toc12
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
THD+N = 10%
THD+N = 1%
RL = 4Ω
f = 1kHz
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX9796 toc13
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
THD+N = 10%
THD+N = 1%
RL = 8Ω
f = 1kHz
OUTPUT POWER
vs. LOAD
MAX9796 toc14
LOAD (Ω)
OUTPUT POWER (W)
THD+N = 10%
THD+N = 1%
VDD = 5V
f = 1kHz
OUTPUT POWER
vs. LOAD
MAX9796 toc15
LOAD (Ω)
OUTPUT POWER (W)
THD+N = 10%
THD+N = 1%
VDD = 3.3V
f = 1kHz
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9796 toc16
PSRR (dB)
10k1k100
-120100k
VDD = 3.3V
VRIPPLE = 100mVP-P
RL = 8Ω
INBAND OUTPUT SPECTRUM
MAX9796 toc17
OUTPUT MAGNITUDE (dBV)
15k10k5k
-14020k
FIXED-FREQUENCY MODULATION MODE
RL = 8Ω
VDD = 5V
f = 1kHz
UNWEIGHTED
VOUT = -60dBV
INBAND OUTPUT SPECTRUM
MAX9796 toc18
OUTPUT MAGNITUDE (dBV)
15k10k5k
020k
FIXED-FREQUENCY MODULATION MODE
RL = 8Ω
VDD = 5V
f = 1kHz
A-WEIGHTED
VOUT = -60dBV
Typical Operating Characteristics (continued)
(VDD= PVDD= CPVDD= 3.3V, GND = PGND = CPGND = 0V, SHDN= VDD, I2C settings (INA gain = +20dB, INB gain = INC gain =
0dB, volume setting = 0dB, mono path gain = 0dB, SHDN= 1, SSM = 1). C1 = C2 = C3 = 1µF. Speaker load resistors (RLSP) are ter-
minated between OUT+ and OUT-, headphone load resistors are terminated to GND, unless otherwise noted.)
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
INBAND OUTPUT SPECTRUM
MAX9796 toc19
FREQUENCY (Hz)
OUTPUT MAGNITUDE (dBV)
15k10k5k
020k
SPREAD-SPECTRUM MODULATION MODE
RL = 8Ω
VDD = 5V
f = 1kHz
UNWEIGHTED
VOUT = -60dBV
INBAND OUTPUT SPECTRUM
MAX9796 toc20
FREQUENCY (Hz)
OUTPUT MAGNITUDE (dBV)
15k10k5k
020k
SPREAD-SPECTRUM MODULATION MODE
RL = 8Ω
VDD = 5V
f = 1kHz
A-WEIGHTED
VOUT = -60dBV
WIDEBAND OUTPUT SPECTRUM
FIXED-FREQUENCY MODE
MAX9796 toc21
FREQUENCY (MHz)
OUTPUT MAGNITUDE (dBV)
VDD = 5V
RL = 8Ω
INPUTS AC GROUNDED
WIDEBAND OUTPUT SPECTRUM
SPREAD-SPECTRUM MODE
MAX9796 toc22
FREQUENCY (MHz)
OUTPUT MAGNITUDE (dBV)
VDD = 5V
RL = 8Ω
INPUTS AC GROUNDED
TURN-ON RESPONSE
MAX9796 toc23
10ms/div
SCL
2V/div
SPEAKER
OUTPUT
200mA/div
TURN-OFF RESPONSE
MAX9796 toc24
10ms/div
SCL
2V/div
SPEAKER
OUTPUT
200mA/div
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9796 toc25
SUPPLY CURRENT (mA)
INPUTS AC GROUNDED
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
MAX9796 toc26
SHUTDOWN CURRENT (
INPUTS AC GROUNDED
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
MAX9796 toc27
THD+N (%)
10k1k100
0.001100k
VDD = 5V
RL = 32Ω
POUT = 20mW
POUT = 40mW
Typical Operating Characteristics (continued)
(VDD= PVDD= CPVDD= 3.3V, GND = PGND = CPGND = 0V, SHDN= VDD, I2C settings (INA gain = +20dB, INB gain = INC gain =
0dB, volume setting = 0dB, mono path gain = 0dB, SHDN= 1, SSM = 1). C1 = C2 = C3 = 1µF. Speaker load resistors (RLSP) are ter-
minated between OUT+ and OUT-, headphone load resistors are terminated to GND, unless otherwise noted.)
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
MAX9796 toc28
FREQUENCY (Hz)
THD+N (%)
10k1k100
0.001100k
VDD = 3.3V
RL = 16Ω
POUT = 20mW
POUT = 40mW
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
MAX9796 toc29
FREQUENCY (Hz)
THD+N (%)
10k1k100
0.001100k
VDD = 3.3V
RL = 32Ω
POUT = 10mW
POUT = 40mW
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
MAX9796 toc30
OUTPUT POWER (mW)
THD+N (%)4020
VDD = 5V
RL = 32Ω
f = 10kHz
f = 20Hz
f = 1kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
OUTPUT POWER (mW)
THD+N (%)
MAX9796 toc31306090120
f = 20Hz
f = 1kHz
f = 10kHz
VDD = 3.3V
RL = 16Ω
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
MAX9796 toc32
OUTPUT POWER (mW)
THD+N (%)4020
VDD = 3.3V
RL = 32Ω
f = 10kHz
f = 20Hz
f = 1kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. COMMON-MODE VOLTAGE
COMMON-MODE VOLTAGE (V)
THD+N (%)
MAX9796 toc330.51.01.52.02.5
VDD = 3.3V
fIN = 1kHz
POUT = 30mW
GAIN = +3dB
RL = 32Ω
POWER DISSIPATION
vs. OUTPUT POWER
MAX9796 toc34
POWER DISSIPATION (mW)40
VDD = 5V
f = 1kHz
RL = 32Ω
POUT = POUTR + POUTL
POWER DISSIPATION
vs. OUTPUT POWER
MAX9796 toc35
POWER DISSIPATION (mW)
VDD = 3.3V
f = 1kHz
POUT = POUTR + POUTL
RL = 16Ω
RL = 32Ω
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX9796 toc36
OUTPUT POWER (mW)
THD+N = 10%
THD+N = 1%
RL = 32Ω
f = 1kHz
Typical Operating Characteristics (continued)
(VDD= PVDD= CPVDD= 3.3V, GND = PGND = CPGND = 0V, SHDN= VDD, I2C settings (INA gain = +20dB, INB gain = INC gain =
0dB, volume setting = 0dB, mono path gain = 0dB, SHDN= 1, SSM = 1). C1 = C2 = C3 = 1µF. Speaker load resistors (RLSP) are ter-
minated between OUT+ and OUT-, headphone load resistors are terminated to GND, unless otherwise noted.)
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
OUTPUT POWER
vs. LOAD
MAX9796 toc37
LOAD (Ω)
OUTPUT POWER (mW)
THD+N = 10%
THD+N = 1%
VDD = 5V
f = 1kHz
OUTPUT POWER
vs. LOAD
MAX9796 toc38
LOAD (Ω)
OUTPUT POWER (mW)
THD+N = 10%
THD+N = 1%
VDD = 3.3V
f = 1kHz
OUTPUT POWER vs. LOAD RESISTANCE
AND CHARGE-PUMP CAPACITOR SIZE
LOAD RESISTANCE (Ω)
OUTPUT POWER (mW)
MAX9796 toc39
C1 = C2 = 2.2μF
VDD = 3.3V
f = 1kHz
THD+N = 1%
C1 = C2 = 1μF
C1 = C2 = 0.68μF
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
FREQUENCY (Hz)
POWER-SUPPLY REJECTION RATIO (dB)
MAX9796 toc40
-101001k10k100k
HPL
HPR
VDD = 3.3V
VIN = 100mVP-P
RL = 32Ω
OUTPUT FREQUENCY SPECTRUM
MAX9796 toc41
FREQUENCY (Hz)
OUTPUT MAGNITUDE (dBV)
15k10k5k
020k
VDD = 3.3V
f = 1kHz
RL = 32Ω
CROSSTALK vs. FREQUENCY
FREQUENCY (Hz)
CROSSTALK (dB)
MAX9796 toc42
-101001k10k100k
OUT_ = 1VP-P
RL = 32Ω
LEFT TO RIGHT
RIGHT TO LEFT
CROSSTALK vs. INPUT AMPLITUDE
INPUT AMPLITUDE (VRMS)
CROSSTALK (dB)
MAX9796 toc430.40.81.2
fIN = 1kHz
RL = 32Ω
GAIN = +3dB
LEFT TO RIGHT
RIGHT TO LEFT
Typical Operating Characteristics (continued)
(VDD= PVDD= CPVDD= 3.3V, GND = PGND = CPGND = 0V, SHDN= VDD, I2C settings (INA gain = +20dB, INB gain = INC gain =
0dB, volume setting = 0dB, mono path gain = 0dB, SHDN= 1, SSM = 1). C1 = C2 = C3 = 1µF. Speaker load resistors (RLSP) are ter-
minated between OUT+ and OUT-, headphone load resistors are terminated to GND, unless otherwise noted.)
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
Pin Description
BUMPNAMEFUNCTIONCPVDDCharge-Pump Power SupplyC1PCharge-Pump Flying Capacitor Positive TerminalCPGNDCharge-Pump GNDC1NCharge-Pump Flying Capacitor Negative TerminalCPVSSCharge-Pump Output. Connect to VSS.HPLLeft Headphone Output
B1, F1, F5PVDDClass D Power Supply
B2, E6I.C.Internal Connection. Leave unconnected. This pin is internally connected to the signal path. Do not
connect together or to any other pin.VBIASCommon-Mode BiasINC1Input C1. Left input or positive input (see Table 5a).VSSHeadphone Amplifier Negative Power Supply. Connect to CPVSS.HPRRight Headphone Output
C1, F4OUT+Positive Speaker OutputSDASerial Data Input. Connect a 1kΩ pullup resistor from SDA to VDD.INC2Input C2. Right input or negative input (see Table 5a).OUTRxMono Receiver Output
D1, F3PGNDPower GroundSCLSerial Clock Input. Connect a 1kΩ pullup resistor from SCL to VDD.INB2Input B2. Right input or negative input (see Table 5a).VDDAnalog Power Supply
E1, F2OUT-Negative Speaker OutputSHDNActive-Low Hardware ShutdownINA1Input A1. Left input or positive input (see Table 5a).INA2Input A2. Right input or negative input (see Table 5a).INB1Input B1. Left input or positive input (see Table 5a).GNDAnalog Ground
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
Typical Application Circuit
MAX9796
CHARGE
PUMP
VDD
1μF10kΩ
1μF
C1N
VBIAS
CPGND
INPUT A: 0dB,
6dB, OR 20dB
C1P
1μF
1μF
CPVDD
1μF
INA2
INA1
INPUT B: 0dB
OR 6dB
1μF
1μF
INB2
INB1
CLASS D
AMPLIFIERINPUT C: 0dB
OR 6dB
1μF
1μF
INC2
INC1
INPUT
MIXER
OUTPUT
MIXER
RIGHT
VOLUME
LEFT
VOLUME
MONO
VOLUME
SDA
SCL
SHDN
I2C CONTROL
3dB
3dB
3dB
DirectDrive
12dB
OUTRx
HPR
OUT-
OUT+
HPL
E1, F2
C1, F4
GNDF3
PGNDPGND
1μFB5
CPVSSVSS
1μF
VDD
VDD
1μF0.1μF
F1, B1, F5
PVDD
VDD
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
Detailed Description
The MAX9796 ultra-low-EMI, filterless, Class D audio
power amplifier features several improvements to
switch-mode amplifier technology. The MAX9796 fea-
tures active emissions limiting circuitry to reduce EMI.
Zero dead-time technology maintains state-of-the-art
efficiency and THD+N performance by allowing the
output FETs to switch simultaneously without cross-
conduction. A unique filterless modulation scheme and
a spread-spectrum modulation create a compact, flexi-
ble, low-noise, efficient audio power amplifier while
occupying minimal board space. The differential input
architecture reduces common-mode noise pickup with
or without the use of input-coupling capacitors. The
MAX9796 can also be configured as a single-ended
input amplifier without performance degradation.
The MAX9796 features three fully differential input pairs
(INA_, INB_, INC_) that can be configured as stereo
single-ended or mono differential inputs. I2C provides
control for input configuration, volume level, and mixer
configuration. DirectDrive allows the headphone and
mono receiver amplifiers to output ground-referenced
signals from a single supply, eliminating the need for
large DC-blocking capacitors. Comprehensive click-
and-pop suppression minimizes audible transients dur-
ing the turn-on and turn-off of amplifiers.
Class D Speaker Amplifier
Comparators monitor the audio inputs and compare the
complementary input voltages to a sawtooth waveform.
The comparators trip when the input magnitude of the
sawtooth exceeds their corresponding input voltage.
The active emissions limiting circuitry slightly reduces
the turn-on rate of the output H-bridge by slew-rate lim-
iting the comparator output pulse. Both comparators
reset at a fixed time after the rising edge of the second
comparator trip point, generating a minimum-width
pulse (tON(MIN), 100ns typ) at the output of the second
comparator (Figure 1). As the input voltage increases
or decreases, the duration of the pulse at one output
increases while the other output pulse duration remains
the same. This causes the net voltage across the
speaker (VOUT+- VOUT-) to change. The minimum-
width pulse helps the device to achieve high levels of
linearity.
OUT+
OUT-
VIN-
VIN+
VOUT+ - VOUT-
tON(MIN)
tSW

Partno	Mfg	Dc	Qty	Available	Descript
MAX9796EBX+TG45	MAX	N/a	5759	avai	2.3W, High-Power Class D Audio Subsystem with DirectDrive Headphone Amplifiers