IC Phoenix
 
Home ›  MM87 > MAX9789AETJ+-MAX9789AETJ+T-MAX9789CETJ+T-MAX9790AETJ+-MAX9790AETJ+T,Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers
MAX9789AETJ+-MAX9789AETJ+T-MAX9789CETJ+T-MAX9790AETJ+-MAX9790AETJ+T Fast Delivery,Good Price
Part Number:
If you need More Quantity or Better Price,Welcom Any inquiry.
We available via phone +865332716050 Email
Partno Mfg Dc Qty AvailableDescript
MAX9789AETJ+ |MAX9789AETJMAXIMN/a577avaiWindows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers
MAX9789AETJ+ |MAX9789AETJMAXINN/a7470avaiWindows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers
MAX9789AETJ+T07+N/a1322avaiWindows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers
MAX9789CETJ+T |MAX9789CETJTMAXIMN/a52400avaiWindows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers
MAX9790AETJ+ |MAX9790AETJMAXINN/a96avaiWindows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers
MAX9790AETJ+TMAXIMN/a868avaiWindows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers


MAX9789CETJ+T ,Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiersfeatures Maxim’s DirectDrivearchitecture that produces a ground-referenced output♦ High +90dB PSRR, ..
MAX978EEE ,Single/Dual/Quad / SOT23 / Single-Supply / High-Speed / Low-Power ComparatorsFeaturesThe MAX976/MAX978/MAX998 dual/quad/single, high-' Single-Supply Operation Down to 2.7Vspeed ..
MAX978EEE+ ,Single/Dual/Quad, SOT23, Single-Supply, High-Speed, Low-Power Comparatorsfeatures a♦ 1nA Shutdown Supply Currentlow-power shutdown mode that places the output in a♦ Rail-to ..
MAX978ESE ,Single/Dual/Quad / SOT23 / Single-Supply / High-Speed / Low-Power Comparatorsapplications. They achieve a20ns propagation delay while consuming only 225µA' 225µA Supply Current ..
MAX978ESE+ ,Single/Dual/Quad, SOT23, Single-Supply, High-Speed, Low-Power ComparatorsGeneral Description ________
MAX9790AETJ+ ,Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone AmplifiersFeaturesThe MAX9789/MAX9790 combine a stereo, 2W Class AB♦ Microsoft Windows Vista Compliantspeaker ..
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


MAX9789AETJ+-MAX9789AETJ+T-MAX9789CETJ+T-MAX9790AETJ+-MAX9790AETJ+T
Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers
MAX9789/MAX9790
Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
Ordering Information

19-0606; Rev 3; 9/09
General Description

The MAX9789/MAX9790 combine a stereo, 2W Class AB
speaker power amplifier with a stereo 100mW
DirectDrive®headphone amplifier in a single device. The
MAX9789/MAX9790 are designed for use with the
Microsoft Windows Vista®operating system and are fully
compliant with Microsoft’s Windows Vista specifications.
The headphone amplifier features Maxim’s DirectDrive
architecture that produces a ground-referenced output
from a single supply to eliminate the need for large DC-
blocking capacitors, as well as save cost, board space,
and component height. A high +90dB PSRR and low
0.002% THD+N ensures clean, low-distortion amplifica-
tion of the audio signal.
Separate speaker and headphone amplifier control
inputs provide independent shutdown of the speaker
and headphone amplifiers, allowing speaker and head-
phone amplifiers to be active simultaneously, if
required. The industry-leading click-and-pop suppres-
sion circuitry reduces audible transients during startup
and shutdown cycles.
The MAX9789 features an internal LDO that can be used
as a clean power supply for a CODEC or other circuits.
The LDO output voltage is set internally at 4.75V or can
be adjusted between 1.21V and 4.75V using a simple
resistive divider. The LDO is protected against thermal
overloads and short circuits while providing 120mA of
continuous output current and can be enabled indepen-
dently of the audio amplifiers.
By disabling the speaker and headphone amplifiers, and
the LDO (for MAX9789), the MAX9789/MAX9790 enter
low-power shutdown mode and draw only 0.3µA.
The MAX9789/MAX9790 operate from a single 4.5V to
5.5V supply and feature thermal-overload and output
short-circuit protection. Devices are specified over the
-40°C to +85°C extended temperature range.
Features
Applications
Note:
All devices are specified over the -40°C to +85°C extended
temperature range.
+Denotes a lead-free/RoHS-compliant package.
*EP = Exposed pad.
**Future product—contact factory for availability.
PARTPIN-PACKAGEINTERNAL LDOtON (ms)
MAX9789AETJ+
32 TQFN-EP*Yes100
MAX9789BETJ+**32 TQFN-EP*Yes25
MAX9789CETJ+32 TQFN-EP*Yes100
MAX9790AETJ+
32 TQFN-EP*No100
MAX9790BETJ+**32 TQFN-EP*No25
Simplified Block Diagrams

MAX9789
SPKR_EN
HP_EN
MUTE
GAIN1
GAIN2
SPEAKER SUPPLY
4.5V TO 5.5V
HEADPHONE SUPPLY
3.0V TO 5.5V
LDO4.5V TO 5.5V
SPKR_INR
SPKR_INL
HP_INR
HP_INL
1.21V TO 4.75VMicrosoft Windows Vista CompliantClass AB 2W Stereo BTL Speaker Amplifier100mW DirectDrive Headphone Amplifier
Eliminates Costly, Bulky DC-Blocking Capacitors
Excellent RF ImmunityIntegrated 120mA LDO (MAX9789)High +90dB PSRR, Low 0.002% THD+NLow-Power Shutdown ModeClick-and-Pop SuppressionShort-Circuit and Thermal-Overload ProtectionAvailable in 32-Pin Thin QFN (5mm x 5mm x
0.8mm) Package

Notebook Computers
Tablet PCs
Portable Multimedia Players
Windows Vista is a registered trademark of Microsoft Corp.
Pin Configurations appear at end of data sheet.

Simplified Block Diagrams continued at end of data sheet.DirectDrive is a registered trademark of Maxim Integrated
MAX9789/MAX9790
Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS

(VDD= PVDD= CPVDD= HPVDD= HP_EN = VLDO_EN(MAX9789 only) = +5V, VGND= VPGND= VCPGND= SPKR_EN= VLDO_SET
(MAX9789 only) = 0V, ILDO_OUT(MAX9789 only) = 0, C1 = C2 = CBIAS= 1µF. RL= ∞, unless otherwise specified, VGAIN1= 0,
VGAIN2= 5V (AVSP= 10dB, AVHP= 3.5dB), TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +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.
Supply Voltage (VDD, PVDD, HPVDD,
CPVDDto GND)..................................................-0.3V to +6.0V
GND to PGND, CPGND......................................................±0.3V
CPVSS, C1N, VSSto GND......................................-6.0V to +0.3V
HPR, HPL to GND...............................................................±3.0V
Any Other Pin.............................................-0.3V to (VDD+ 0.3V)
Duration of OUT_+, OUT_- Short Circuit
to GND or PVDD......................................................Continuous
Duration of Short Circuit between OUT_+, OUT_-
and LDO_OUT.........................................................Continuous
Duration of Short Circuit between HPR, HPL and GND,
VSSor HPVDD..........................................................Continuous
Continuous Current (PVDD, OUT_+, OUT_-, PGND).............1.7A
Continuous Current (CPVDD, C1N, C1P, CPVSS, PVSS,
VDD,HPVDD, LDO_OUT, HPR, HPL).............................850mA
Continuous Input Current (all other pins).........................±20mA
Continuous Power Dissipation (TA= +70°C)
32-Pin Thin QFN Single-Layer Board
(derate 18.6mW/°C above +70°C)..............................1489mW
θJA...........................................................................53.7°C/W
θJC...........................................................................19.9°C/W
32-Pin Thin QFN Multilayer Board
(derate 24.9 mW/°C above +70°C).............................1990mW
θJA...........................................................................40.2°C/W
θJC...........................................................................19.9°C/W
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
GENERAL

Supply VoltageVDD, PVDDGuaranteed by PSRR and LDO Line
Regulation Tests4.55.5V
Headphone Supply VoltageCPVDD,
HPVDDGuaranteed by PSRR Test3.05.5V
SPKR_ENHP_EN
1 (MAX9789)0 (MAX9789)0.10.4mA
1 (MAX9790)0 (MAX9790)0.36µA71301429
Quiescent CurrentIDD11840
Shutdown CurrentISHDNSPKR_EN = VDD, HP_EN = LDO_EN = GND0.36µA
Bias VoltageVBIAS1.71.81.9V
MAX9789A/MAX9789C/MAX9790A100Shutdown to Full OperationtSONMAX9789B/MAX9790B25ms
Gain Switching TimetSW10µs
Channel-to-Channel Gain
Tracking±0.1dB
SPEAKER AMPLIFIER

RL = 4Ω2Output PowerPOUTTHD+N = 1%, f = 1kHz,
TA = +25°CRL = 8Ω1W
RL = 8Ω, POUT = 1W, f = 1kHz0.002Total Harmonic Distortion Plus
NoiseTHD+N%
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 /thermal-tutorial.
MAX9789/MAX9790
Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
ELECTRICAL CHARACTERISTICS (continued)

(VDD= PVDD= CPVDD= HPVDD= HP_EN = VLDO_EN(MAX9789 only) = +5V, VGND= VPGND= VCPGND= SPKR_EN= VLDO_SET
(MAX9789 only) = 0V, ILDO_OUT(MAX9789 only) = 0, C1 = C2 = CBIAS= 1µF. RL= ∞, unless otherwise specified, VGAIN1= 0,
VGAIN2= 5V (AVSP= 10dB, AVHP= 3.5dB), TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS

VDD = 4.5V to 5.5V, TA = +25°C7290
f = 1kHz, 200mVP-P (Note 4)70Power-Supply Rejection RatioPSRR
f = 10kHz, 200mVP-P (Note 4)50
GAIN1GAIN2610015.6
Voltage GainAV121.6
Measured at speaker amplifier inputs
GAIN1GAIN2806545
Input ImpedanceRIN25±15
Output Offset VoltageVOS
Measured between
OUT_+ and OUT_-,
TA = +25°CMAX9789C±1±25
Into shutdown-50
Click-and-Pop LevelKCP
RL = 8Ω, peak voltage,
A-weighted, 32 samples
per second (Notes 3, 4)Out of shutdown-50
dBV
A-weighted102Signal-to-Noise RatioSNRRL = 8Ω, POUT = 1Wf = 22Hz to 22kHz99dB
NoiseVnBW = 22Hz to 22kHz30µVRMS
Capacitive-Load DriveCLNo sustained oscillations200pF
Crosstalk
L to R, R to L, RL = 8Ω, FS = 0.707VRMS,
VOUT = 70.7nVRMS, 20kHz AES17,
BW = 20Hz to 20kHz
-70dB
Slew RateSR1.4V/µs
HEADPHONE AMPLIFIER

RL = 16Ω100Output PowerPOUTTHD+N = 1%, f =
1kHz, TA = +25°CRL = 32Ω55mW
RL = 32Ω, FS = 0.300VRMS,
VOUT = 210mVRMS, 20kHz AES17,
BW = 20Hz to 20kHz
-77dB FS
RL = 32Ω, POUT = 40mW, f = 1kHz0.02
RL = 16Ω, POUT = 60mW, f = 1kHz0.03Total Harmonic Distortion Plus
NoiseTHD+N
RL = 10kΩ, FS = 0.707VRMS,
VOUT = 500mVRMS, 20kHz AES17,
BW = 20Hz to 20kHz
-94dB FS
MAX9789/MAX9790
Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
ELECTRICAL CHARACTERISTICS (continued)

(VDD= PVDD= CPVDD= HPVDD= HP_EN = VLDO_EN(MAX9789 only) = +5V, VGND= VPGND= VCPGND= SPKR_EN= VLDO_SET
(MAX9789 only) = 0V, ILDO_OUT(MAX9789 only) = 0, C1 = C2 = CBIAS= 1µF. RL= ∞, unless otherwise specified, VGAIN1= 0,
VGAIN2= 5V (AVSP= 10dB, AVHP= 3.5dB), TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS

HPVDD = 3V to 5.5V, TA = +25°C7095
f = 1kHz, VRIPPLE = 200mVP-P (Note 4)84Power-Supply Rejection RatioPSRR
f = 10kHz, VRIPPLE = 200mVP-P (Note 4)63
Voltage GainAV3.5dB
Input ImpedanceRINMeasured at headphone amplifier inputs204080kΩ±7Output Offset VoltageVOSTA = +25°CMAX9789C±2±10mV
Into shutdown-60
Click-and-Pop LevelKCP
RL = 32Ω, peak voltage,
A-weighted, 32 samples
per second (Notes 3, 4)Out of shutdown-60
dBV
RL = 32Ω, f = 1kHz, A-weighted,
FS = 0.300VRMS, VOUT = 300µVRMS89
Dynamic RangeDRRL = 10kΩ, f = 1kHz, A-weighted,
FS = 0.707VRMS, VOUT = 707µVRMS97
dB FS
22Hz to 22kHz100Signal-to-Noise RatioSNRRL = 32Ω,
POUT = 60mWA-weighted103dB
NoiseVnBW = 22Hz to 22kHz12µVRMS
Capacitive-Load DriveCLNo sustained oscillations200pF
RL = 32Ω,
FS = 0.300VRMS,
VOUT = 30mVRMS
Crosstalk
L to R, R to L,
20kHz AES17
BW = 20Hz to 20kHzRL = 10kΩ,
FS = 0.707VRMS,
VOUT = 70.7mVRMS
Slew RateSR0.4V/µs
Charge-Pump FrequencyfOSCMAX9789C475550625kHz
LOW-DROPOUT LINEAR REGULATOR

Regulator Input Voltage RangeVDDInferred from line regulation4.55.5V
IOUT = 0mA0.10.4Ground CurrentIGNDIOUT = 120mA-40mA
Output CurrentIOUT120mA
CrosstalkVOUT = 4.75V, IOUT = 0mA, f = 1kHz,
speaker POUT = 2W, speaker RL = 4Ω-95dB
±1.5Fixed Output Voltage AccuracyIOUT = 1mAMAX9789C±3.0%
Adjustable Output Voltage Range1.214.75V
1.181.211.23LDO_SET Reference VoltageVSETMAX9789C1.181.211.25V
LDO_SET Dual-Mode Threshold200mV
MAX9789/MAX9790
Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
Note 2:
All devices are 100% production tested at room temperature. All temperature limits are guaranteed by design.
Note 3:
Specified at room temperature with an 8Ωresistive load connected across BTL output for speaker amplifier. Specified at
room temperature with a 32Ωresistive load connected between HPR, HPL, and GND for headphone amplifier. Speaker and
headphone mode transitions are controlled by SPKR_ENand HP_EN control pins, respectively.
Note 4:
Amplifier inputs AC-coupled to GND.
Note 5:
Maximum value is due to test limitations.
Note 6:
VLDO_OUT= VLDO_OUTNOMINAL - 2%.
ELECTRICAL CHARACTERISTICS (continued)

(VDD= PVDD= CPVDD= HPVDD= HP_EN = VLDO_EN(MAX9789 only) = +5V, VGND= VPGND= VCPGND= SPKR_EN= VLDO_SET
(MAX9789 only) = 0V, ILDO_OUT(MAX9789 only) = 0, C1 = C2 = CBIAS= 1µF. RL= ∞, unless otherwise specified, VGAIN1= 0,
VGAIN2= 5V (AVSP= 10dB, AVHP= 3.5dB), TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS

LDO_SET Input Bias Current
(Note 5)ISET±20±500nA
IOUT = 50mA2550
Dropout Voltage (Note 6)VDO
VOUT = 4.75V (fixed
output operation),
TA = +25°CIOUT = 120mA75150
Current LimitILIM300mA
Startup Time20µs
Line RegulationVIN = 4.5V to 5.5V, LDO_OUT = 2.5V,
ILDO_OUT = 1mA-4.8+0.8+4.8mV/V
Load RegulationVLDO_OUT = 4.75V,
1mA < ILDO_OUT < 120mA0.2mV/mA
f = 1kHz59Ripple RejectionVRIPPLE = 200mVP-P
ILDO_OUT = 10mAf = 10kHz42dB
Output Voltage Noise20Hz to 22kHz, CLDO_OUT = 2 x 1µF,
ILDO_OUT = 120mA125µVRMS
DIGITAL INPUTS (SPKR_EN, HP_EN, MUTE, GAIN1, GAIN2, LDO_EN (MAX9789 Only))

Input-Voltage HighVINH2V
Input-Voltage LowVINL0.8V
Input Bias Current±1µA
MAX9789/MAX9790
Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
Typical Operating Characteristics

(VDD= PVDD= CPVDD= HPVDD= LDO_EN = +5V, VGND= VPGND= VCPGND= VLDO_SET= 0V, C1 = C2 = CBIAS= CIN= 1µF. RL=
∞, unless otherwise specified, GAIN1 = 0, GAIN2 = 1 (AVSP= 10dB, AVHP= 3.5dB), measurement BW = 20kHz AES17, TA= +25°C,
unless otherwise noted. Headphone mode: SPKR_EN= 1, HP_EN = 0. Speaker mode: SPKR_EN= 0, HP_EN = 1.)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (HEADPHONE MODE)

MAX9789 toc01
FREQUENCY (Hz)
THD+N (dB FS)
10k1k100
-110100k
FS = 0.707VRMS
VOUT = -3dB FS
RL = 10kΩ
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (HEADPHONE MODE)

MAX9789 toc02
FREQUENCY (Hz)
THD+N (dB FS)
10k1k100
-100100k
HPVDD = 3V
FS = 0.707VRMS
VOUT = -3dB FS
RL = 10kΩ
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT VOLTAGE (HEADPHONE MODE)

MAX9789 toc03
OUTPUT VOLTAGE (VRMS)
THD+N (%)
RL = 10kΩ
fIN = 20Hz
fIN = 10kHz
fIN = 1kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT VOLTAGE (HEADPHONE MODE)

MAX9789 toc04
OUTPUT VOLTAGE (VRMS)
THD+N (%)
HPVDD = 3V
RL = 10kΩ
fIN = 20Hz
fIN = 1kHz
fIN = 10kHz
CROSSTALK
vs. FREQUENCY (HEADPHONE MODE)

MAX9789 toc05
FREQUENCY (Hz)
CROSSTALK (dB)
10k1k100
-100100k
FS = 0.707VRMS
VOUT = -20dB FS
RL = 10kΩ
LEFT TO RIGHT
RIGHT TO LEFT
HEADPHONE OUTPUT SPECTRUM

MAX9789 toc06
FREQUENCY (Hz)
CROSSTALK (dB)
15k10k5k
-13020k
FS = 0.300VRMS
VOUT = -60dB FS
RL = 10kΩ
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (SPEAKER MODE)

MAX9789 toc07
THD+N (dB FS)100
-100100k10k
VOUT = -3dB FS
FS = 0.707VRMS
RL = 3Ω
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (SPEAKER MODE)

MAX9789 toc08
THD+N (dB FS)100
-100100k10k
VOUT = -3dB FS
FS = 0.707VRMS
RL = 4Ω
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (SPEAKER MODE)

MAX9789 toc09
THD+N (dB FS)100
-110100k10k
VOUT = -3dB FS
FS = 0.707VRMS
RL = 8Ω
MAX9789/MAX9790
Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
Typical Operating Characteristics (continued)

(VDD= PVDD= CPVDD= HPVDD= LDO_EN = +5V, VGND= VPGND= VCPGND= VLDO_SET= 0V, C1 = C2 = CBIAS= CIN= 1µF. RL=
∞, unless otherwise specified, GAIN1 = 0, GAIN2 = 1 (AVSP= 10dB, AVHP= 3.5dB), measurement BW = 20kHz AES17, TA= +25°C,
unless otherwise noted. Headphone mode: SPKR_EN= 1, HP_EN = 0. Speaker mode: SPKR_EN= 0, HP_EN = 1.)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)

MAX9789 toc10
OUTPUT POWER (W)
THD+N (%)
RL = 3Ω
fIN = 10kHz
fIN = 20HzfIN = 1kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)

MAX9789 toc11
OUTPUT POWER (W)
THD+N (%)
RL = 4Ω
fIN = 10kHz
fIN = 20HzfIN = 1kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)

MAX9789 toc12
OUTPUT POWER (W)
THD+N (%)
RL = 8Ω
fIN = 10kHz
fIN = 20Hz
fIN = 1kHz
CROSSTALK
vs. FREQUENCY (SPEAKER MODE)

MAX9789 toc13
FREQUENCY (Hz)
CROSSTALK (dB)
10k1k100
-90100k
FS = 0.707VRMS
VOUT = -20dB FS
RL = 8Ω
LEFT TO RIGHT
RIGHT TO LEFT
SPEAKER OUTPUT SPECTRUM

FREQUENCY (Hz)
CROSSTALK (dB)
MAX9789 toc145k10k15k20k
FS = 0.707VRMS
VOUT = -60dB FS
RL = 8Ω
OUTPUT POWER vs. LOAD RESISTANCE
(SPEAKER MODE)

RL (Ω)
OUTPUT POWER (W)
MAX9789 toc15
fIN = 1kHz
THD+N = 1%
THD+N = 10%
POWER DISSIPATION PER CHANNEL
vs. OUTPUT POWER (SPEAKER MODE)

POWER DISSIPATION PER CHANNEL (W)
MAX9789 toc160.51.01.52.0
RL = 8Ω
RL = 4Ω
fIN = 1kHz
POWER-SUPPLY REJECTION RATIO
(SPEAKER MODE)

PSRR (dB)
MAX9789 toc171001k10k100k
VRIPPLE = 200mVP-P
OUTPUT REFERRED
SPEAKER SHUTDOWN WAVEFORM
MAX9789 toc20
20ms/div
2V/div
5V/div
100mV/div
OUT_+ AND OUT_-
OUT_+ - OUT_-
SPKR_EN
Typical Operating Characteristics (continued)

(VDD= PVDD= CPVDD= HPVDD= LDO_EN = +5V, VGND= VPGND= VCPGND= VLDO_SET= 0V, C1 = C2 = CBIAS= CIN= 1µF. RL=
∞, unless otherwise specified, GAIN1 = 0, GAIN2 = 1 (AVSP= 10dB, AVHP= 3.5dB), measurement BW = 20kHz AES17, TA= +25°C,
unless otherwise noted. Headphone mode: SPKR_EN= 1, HP_EN = 0. Speaker mode: SPKR_EN= 0, HP_EN = 1.)
MAX9789/MAX9790
Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
SPEAKER STARTUP WAVEFORM

MAX9789 toc18
20ms/div
2V/div
OUT_+ AND OUT_-
OUT_+ - OUT_-
5V/div
SPKR_EN
100mV/div
MAX9789A/MAX9789C/MAX9790A
SPEAKER STARTUP WAVEFORM

MAX9789 toc19
20ms/div
OUT_+ AND OUT_-
2V/div
OUT_+ - OUT_-
100mV/div
SPKR_EN
5V/div
MAX9789B/MAX9790B
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (HEADPHONE MODE)

MAX9789 toc21
FREQUENCY (Hz)
THD+N (dB FS)
10k1k100
-70100k
FS = 0.300VRMS
RL = 32Ω
VOUT = -3dB FS
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (HEADPHONE MODE)

MAX9789 toc22
FREQUENCY (Hz)
THD+N (dB FS)
10k1k100
-70100k
HPVDD = 3V
FS = 0.300VRMS
RL = 32Ω
VOUT = -3dB FS
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (HEADPHONE MODE)

MAX9789 toc23
FREQUENCY (Hz)
THD+N (dB FS)
10k1k100
-70100k
FS = 0.300VRMS
RL = 16Ω
VOUT = -3dB FS
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (HEADPHONE MODE)

MAX9789 toc24
FREQUENCY (Hz)
THD+N (dB FS)
10k1k100
-70100k
HPVDD = 3V
FS = 0.300VRMS
RL = 16Ω
VOUT = -3dB FS
MAX9789/MAX9790
HEADPHONE OUTPUT SPECTRUM

MAX9789 toc30
FREQUENCY (kHz)
AMPLITUDE (dB)105
FS = 0.707VRMS
VOUT = -60dB FS
RL = 32Ω
OUTPUT POWER vs. LOAD RESISTANCE
(HEADPHONE MODE)

OUTPUT POWER (mW)
MAX9789 toc31
THD+N = 1%
THD+N = 10%
fIN = 1kHz
OUTPUT POWER vs. LOAD RESISTANCE
(HEADPHONE MODE)

OUTPUT POWER (mW)
MAX9789 toc32
HPVDD = 3V
fIN = 1kHz
THD+N = 1%
THD+N = 10%
Typical Operating Characteristics (continued)

(VDD= PVDD= CPVDD= HPVDD= LDO_EN = +5V, VGND= VPGND= VCPGND= VLDO_SET= 0V, C1 = C2 = CBIAS= CIN= 1µF. RL=
∞, unless otherwise specified, GAIN1 = 0, GAIN2 = 1 (AVSP= 10dB, AVHP= 3.5dB), measurement BW = 20kHz AES17, TA= +25°C,
unless otherwise noted. Headphone mode: SPKR_EN= 1, HP_EN = 0. Speaker mode: SPKR_EN= 0, HP_EN = 1.)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (HEADPHONE MODE)

MAX9789 toc26
OUTPUT POWER (mW)
THD+N (%)4020
RL = 32Ω
f = 1kHz
f = 10kHz
f = 20Hz
CROSSTALK
vs. FREQUENCY (HEADPHONE MODE)

MAX9789 toc29
FREQUENCY (Hz)
CROSSTALK (dB)
10k1k100
-100100k
FS = 0.300VRMS
VOUT = -20dB FS
RL = 32Ω
LEFT TO RIGHT
RIGHT TO LEFT
Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (HEADPHONE MODE)

MAX9789 toc25
OUTPUT POWER (mW)
THD+N (%)
RL = 16Ω
f = 20Hz
f = 10kHz
f = 1kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (HEADPHONE MODE)

MAX9789 toc27
OUTPUT POWER (mW)
THD+N (%)
HPVDD = 3V
RL = 16Ω
f = 1kHz
f = 10kHz
f = 20Hz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (HEADPHONE MODE)

MAX9789 toc28
OUTPUT POWER (mW)
THD+N (%)4020
HPVDD = 3V
RL = 32Ω
f = 20Hz
f = 10kHz
f = 1kHz
MAX9789/MAX9790
Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
POWER DISSIPATION vs. OUTPUT POWER
(HEADPHONE MODE)

OUTPUT POWER PER CHANNEL (mW)
POWER DISSIPATION PER CHANNEL (mW)
MAX9789 toc33255075100125
RL = 32Ω
RL = 16Ω
POWER DISSIPATION PER CHANNEL
vs. OUTPUT POWER (HEADPHONE MODE)

OUTPUT POWER PER CHANNEL (mW)
POWER DISSIPATION PER CHANNEL (mW)
MAX9789 toc3420406080
RL = 32Ω
RL = 16Ω
HPVDD = 3V
HEADPHONE OUTPUT POWER vs. HPVDD

HPVDD (V)
HEADPHONE OUTPUT POWER (mW)
MAX9789 toc35
THD+N = 1%
fIN = 1kHz
RL = 32Ω
RL = 16Ω
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (HEADPHONE MODE)

FREQUENCY (Hz)
PSRR (dB)
MAX9789 toc36
-101001k10k100k
VRIPPLE = 200mVP-P
OUTPUT REFERRED
HEADPHONE STARTUP WAVEFORM

MAX9789 toc37
HP_
500mV/div
HP_EN
5V/div
MAX9789A/MAX9789C/MAX9790A
HEADPHONE STARTUP WAVEFORM

MAX9789 toc38
HP_EN
5V/div
HP_
500mV/div
MAX9789B/MAX9790B
Typical Operating Characteristics (continued)

(VDD= PVDD= CPVDD= HPVDD= LDO_EN = +5V, VGND= VPGND= VCPGND= VLDO_SET= 0V, C1 = C2 = CBIAS= CIN= 1µF. RL=
∞, unless otherwise specified, GAIN1 = 0, GAIN2 = 1 (AVSP= 10dB, AVHP= 3.5dB), measurement BW = 20kHz AES17, TA= +25°C,
unless otherwise noted. Headphone mode: SPKR_EN= 1, HP_EN = 0. Speaker mode: SPKR_EN= 0, HP_EN = 1.)
MAX9789/MAX9790
Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
Typical Operating Characteristics (continued)

(VDD= PVDD= CPVDD= HPVDD= LDO_EN = +5V, VGND= VPGND= VCPGND= VLDO_SET= 0V, C1 = C2 = CBIAS= CIN= 1µF. RL=
∞, unless otherwise specified, GAIN1 = 0, GAIN2 = 1 (AVSP= 10dB, AVHP= 3.5dB), measurement BW = 20kHz AES17, TA= +25°C,
unless otherwise noted. Headphone mode: SPKR_EN= 1, HP_EN = 0. Speaker mode: SPKR_EN= 0, HP_EN = 1.)
HEADPHONE SHUTDOWN WAVEFORM

MAX9789 toc39
20ms/div
HP_
HP_EN
5V/div
500mV/div
SUPPLY CURRENT vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
MAX9789 toc40
SPKR_EN = 0
HP_EN = 0
SPKR_EN = 0
HP_EN = 1
SPKR_EN = 1
HP_EN = 0SPKR_EN = 1
HP_EN = 1
SHUTDOWN CURRENT vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)
SHUTDOWN CURRENT (
MAX9789 toc41
SPKR_EN = 5V
HP_EN = 0
LDO_EN = 0 (MAX9789)
LDO OUTPUT VOLTAGE ACCURACY
vs. ILOAD

ILOAD (mA)
LDO OUTPUT VOLTAGE ACCURACY (%)
MAX9789 toc42255075100125150
VLDO_OUT = 4.75V
LDO OUTPUT VOLTAGE ACCURACY
vs. AMPLIFIER OUTPUT POWER

AMPLIFIER OUTPUT POWER (W)
LDO OUTPUT VOLTAGE ACCURACY (%)
MAX9789 toc430.51.01.52.02.53.0
VLDO_OUT = 4.75V
ILDO_OUT = 0A
LDO OUTPUT VOLTAGE ACCURACY
vs. TEMPERATURE

TEMPERATURE (°C)
LDO OUTPUT VOLTAGE ACCURACY (%)
MAX9789 toc44
ILDO_OUT = 1mA
MAX9789/MAX9790
Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
LINE-TRANSIENT RESPONSE

MAX9789 toc48
1ms/div
LDO_OUT
(AC-COUPLED)
20mV/div
VDD
1V/div
5.5V
4.5V
LDO LOAD-TRANSIENT RESPONSE

MAX9789 toc49
20ms/div
AC-COUPLED
VLDO_OUT
10mV/div
ILDO_OUT
15mA/div
LDO SHUTDOWN RESPONSE

MAX9789 toc50
200ms/div
VLDO_OUT
2V/div
LDO_EN
2V/div
ILOAD = 0mA
LDO CROSSTALK vs. FREQUENCY

CROSSTALK (dB)
MAX9789 toc51
-201001k10k100k
VLDO_OUT = 4.75V
POUT = 2W
RL = 4Ω
IOUT = 0mA
LEFT SPEAKER TO LDO
RIGHT SPEAKER TO LDO
Typical Operating Characteristics (continued)

(VDD= PVDD= CPVDD= HPVDD= LDO_EN = +5V, VGND= VPGND= VCPGND= VLDO_SET= 0V, C1 = C2 = CBIAS= CIN= 1µF. RL=
∞, unless otherwise specified, GAIN1 = 0, GAIN2 = 1 (AVSP= 10dB, AVHP= 3.5dB), measurement BW = 20kHz AES17, TA= +25°C,
unless otherwise noted. Headphone mode: SPKR_EN= 1, HP_EN = 0. Speaker mode: SPKR_EN= 0, HP_EN = 1.)
DROPOUT VOLTAGE vs. ILOAD

MAX9789 toc45
ILOAD (mA)
DROPOUT VOLTAGE (mV)
VLDO_OUT = 4.75V
VLDO_OUT = 3.3V
RIPPLE REJECTION vs. FREQUENCY

MAX9789 toc46
FREQUENCY (Hz)
RIPPLE REJECTION (dB)
10k1k100
-90100k
VLDO_OUT = 4.75V
VRIPPLE = 200mVP-P
IOUT = 10mA
OUTPUT REFERRED
VLDO_OUT = 3.3V
OUTPUT NOISE vs. FREQUENCY

MAX9789 toc47
FREQUENCY (Hz)
OUTPUT NOISE (
Hz)
10k1k100
0.01100k
MAX9789/MAX9790
Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
Pin Description
PIN
MAX9789MAX9790
NAMEFUNCTION
—LDO_SETRegulator Feedback Input. Connect to GND for 4.75V fixed output. Connect to a resistor-
divider for adjustable output. See Figure 1.2SPKR_INRRight-Channel Speaker Amplifier Input3SPKR_INLLeft-Channel Speaker Amplifier Input—LDO_ENLDO Enable. Connect LDO_EN to VDD to enable the LDO.
5, 215, 21PGNDPower Ground. Star-connect to GND.6OUTL+Left-Channel Speaker Amplifier Output, Positive Phase7OUTL-Left-Channel Speaker Amplifier Output, Negative Phase
8, 188, 18PVDDSpeaker Amplifier Power-Supply Input. Bypass with a 0.1µF capacitor to PGND.9CPVDDCharge-Pump Power Supply. Connect a 1µF capacitor between CPVDD and PGND.10C1PCharge-Pump Flying Capacitor Positive Terminal. Connect a 1µF capacitor between C1P
to C1N.11CPGNDCharge-Pump Ground. Connect directly to PGND plane.12C1NCharge-Pump Flying Capacitor Negative Terminal. Connect a 1µF capacitor between C1P
to C1N.13CPVSSCharge-Pump Output. Connect to PVSS.14PVSSHeadphone Amplifier Negative Power Supply. Connect a 1µF capacitor between PVSS and
PGND.15HPRRight-Channel Headphone Amplifier Output16HPLLeft-Channel Headphone Amplifier Output17HPVDDHeadphone Amplifier Positive Power Supply. Connect a 10µF capacitor between HPVDD
and PGND.19OUTR-Right-Channel Speaker Amplifier Output, Negative Phase20OUTR+Right-Channel Speaker Amplifier Output, Positive Phase22HP_ENActive-High Headphone Amplifier Enable23SPKR_ENActive-Low Speaker Amplifier Enable24BIASCommon-Mode Bias Voltage. Bypass with a 1µF capacitor to GND.25MUTEActive-Low Mute Enable. Mutes speaker and headphone amplifiers.26HP_INRRight-Channel Headphone Amplifier Input27HP_INLLeft-Channel Headphone Amplifier Input4, 28GNDSignal Ground. Star-connect to PGND.—LDO_OUTLDO Output. Bypass with two 1µF capacitors to GND.30VDD
Positive Power Supply and LDO Input (MAX9789). Bypass with one 0.1µF capacitor and
two 1µF capacitors to GND (MAX9789). Bypass with one 0.1µF capacitor and one 1µF
capacitor to GND (MAX9790).31GAIN1Speaker Amplifier Gain Select 132GAIN2Speaker Amplifier Gain Select 21, 29N.C.No Connection. Not internally connected.EPEPExposed Paddle. Connect to GND.
MAX9789/MAX9790
Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
Detailed Description

The MAX9789/MAX9790 combine a 2W BTL speaker
amplifier with an 100mW DirectDrive headphone amplifi-
er. These devices feature comprehensive click-and-pop
suppression and programmable four-level speaker ampli-
fier gain control. The MAX9789/MAX9790 feature high
+90dB PSRR, low 0.002% THD+N, industry-leading click-
and-pop performance, low-power shutdown mode, and
excellent RF immunity. The MAX9789 incorporates an
integrated LDO that serves as a clean power supply for a
CODEC or other circuits.
The MAX9789/MAX9790 is Microsoft Windows Vista com-
pliant. See Table 1 for a comparison of the Microsoft
Windows Vista premium mobile specifications and
MAX9789/MAX9790 specifications.
The speaker amplifiers use BTL architecture, doubling the
voltage drive to the speakers and eliminating the need for
DC-blocking capacitors. The output consists of two sig-
nals, identical in magnitude, but 180°out of phase.
The headphone amplifiers use Maxim’s DirectDrive
architecture to eliminate the bulky output DC-blocking
capacitors required by traditional headphone ampli-
fiers. A charge pump inverts a positive supply (CPVDD)
to create a negative supply (CPVSS). The headphone
amplifiers operate from these bipolar supplies with their
outputs biased about GND. The benefit of the GND
bias is that the amplifier outputs no longer have a DC
component (typically VDD / 2). This feature eliminates
the large DC-blocking capacitors required with conven-
tional headphone amplifiers to conserve board space
and system cost, as well as improve low-frequency
response.
The MAX9789/MAX9790 feature programmable speak-
er amplifier gain, allowing the speaker gain to be set by
the logic voltages applied to GAIN1 and GAIN2, while
the headphone amplifiers feature a fixed 3.5dB gain.
Both amplifiers feature an undervoltage lockout that
prevents operation from an insufficient power supply
and click-and-pop suppression that eliminates audible
transients on startup and shutdown. The amplifiers
include thermal overload and short-circuit protection.
An additional feature of the speaker amplifiers is that
there is no phase inversion from input to output.
Low-Dropout Linear Regulator
(MAX9789 Only)

The MAX9789’s low-dropout (LDO) linear regulator can
be used to provide a clean power supply to a CODEC
or other circuitry. The LDO can be enabled indepen-
dently of the audio amplifiers. Set LDO_EN = VDDto
enable the LDO or set LDO_EN = GND to disable the
LDO. The LDO is capable of providing up to 120mA
continuous current and features Maxim’s Dual Mode™
feedback, easily enabling a fixed 4.75V output or a
user-adjustable output. When LDO_SET is connected
to GND, the output is internally set to 4.75V. The output
voltage can be adjusted from 1.21V to 4.75V by con-
necting two external resistors as a voltage divider, at
LDO_SET (Figure 1).
Note:
THD+N, DYNAMIC RANGE, and CROSSTALK should be measured in accordance with AES-17 audio measurements standards.
Table 1. Windows Premium Mobile Vista Specifications vs. MAX9789/MAX9790
Specifications
DEVICE TYPEREQUIREMENTWINDOWS PREMIUM MOBILE Vista
SPECIFICATIONS
MAX9789/MAX9790
TYPICAL PERFORMANCE

THD+N≤ -65dB FS
[20Hz, 20kHz]
-94dB FS
[20Hz, 20kHz]
Dynamic range with
signal present
≤ -80dB FS,
A-weighted
-97dB FS,
A-weighted
Analog Line Output
Jack (RL = 10kΩ,
FS = 0.707VRMS)
Line output crosstalk≤ -50dB
[20Hz, 20kHz]
-77dB
[20Hz, 20kHz]
THD+N≤ -45dB FS
[20Hz, 20kHz]
-77dB FS
[20Hz, 20kHz]
Dynamic range with
signal present
≤ -60dB FS,
A-weighted
-89dB FS,
A-weighted
Analog Headphone
Out Jack (RL = 32Ω,
FS = 0.300VRMS)
Headphone output
crosstalk
≤ -50dB
[20Hz, 20kHz]
-74dB
[20Hz, 20kHz]
ic,good price


TEL:86-533-2716050      FAX:86-533-2716790
   

©2020 IC PHOENIX CO.,LIMITED