Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Audio amplifier 1-channel (mono) with stereo headphones Class D TQFN 28 (4x4)

General Description

The MAX9791 combines a stereo 2W Class D power

amplifier, a stereo 180mW DirectDrive

headphone

amplifier, and a 120mA low-dropout (LDO) linear regu-

lator in a single device. The MAX9792 combines a

mono 3W Class D power amplifier, a stereo 180mW

DirectDrive headphone amplifier, and a 120mA LDO

linear regulator in a single device.

The MAX9791/MAX9792 feature Maxim’s DirectDrive

headphone amplifier architecture that produces a

ground-referenced output from a single supply, eliminat-

ing the need for large DC-blocking capacitors, saving

cost, board space, and component height. High 107dB

DC PSRR and low 0.006% THD+N ensure clean, low-

distortion amplification of the audio signal.

The ground sense feature senses and corrects for the

voltage difference between the output jack ground and

device signal ground. This feature minimizes head-

phone amplifier crosstalk by sensing the impedance in

the ground return trace and correcting for it at the out-

put jack. This feature also minimizes ground-loop noise

when the output socket is used as a line out connection

to other grounded equipment (for example, a PC con-

nected to a home hi-fi system).

The MAX9791/MAX9792 feature low RF susceptibility,

allowing the amplifiers to successfully operate in close

proximity to wireless applications. The MAX9791/

MAX9792 Class D amplifiers feature Maxim’s spread-

spectrum modulation and active emissions limiting cir-

cuitry. Industry-leading click-and-pop suppression

eliminates audible transients during power-up and shut-

down cycles.

The MAX9791/MAX9792 wake-on-beep feature wakes

up the speaker and headphone amplifiers when a qual-

ified beep signal is detected at the BEEP input.

For maximum flexibility, separate speaker and head-

phone amplifier control inputs provide independent

shutdown of the speaker and headphone amplifiers.

Additionally the LDO can be enabled independently of

the audio amplifiers.

The MAX9791/MAX9792 feature thermal-overload and

output short-circuit protection. The devices are avail-

able in 28-pin TQFN packages and are specified over

the -40°C to +85°C extended temperature range.

Applications

Notebook Computers

Tablet PCs

Portable Multimedia Players

Features

o Windows Vista® Premium Compliant

o Low EMI Filterless Class D Speaker Amplifiers

Pass EN55022B Emissions Limit with 30cm of

Speaker Cable

o 180mW DirectDrive Headphone Amplifier

o Excellent RF Immunity

o Integrated 120mA LDO

o Eliminates Headphone Ground Loop Noise

o Wake-on-Beep Function

o Click-and-Pop Suppression

o Short-Circuit and Thermal-Overload Protection

o Thermally Efficient, Space-Saving Package

28-Pin TQFN-EP (4mm x 4mm x 0.75mm)

MAX9791/MAX9792

Windows Vista-Compliant Class D Speaker

Amplifiers with DirectDrive Headphone Amplifiers

________________________________________________________________

Maxim Integrated Products

19-4217; Rev 1; 6/10

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Ordering Information

PART

STEREO/

MONO

LDO

OUTPUT

PIN-PACKAGE

MAX9791AETI+ Stereo 4.75V 28 TQFN-EP*

MAX9791BETI+ Stereo 3.3V 28 TQFN-EP*

MAX9791CETI+ Stereo 1.8V 28 TQFN-EP*

MAX9792AETI+ Mono 4.75V 28 TQFN-EP*

MAX9792CETI+ Mono 1.8V 28 TQFN-EP*

Note: All devices are specified over the -40°C to +85°C

extended temperature range.

Denotes a lead(Pb)-free/RoHS-compliant package.

EP = Exposed pad.

DirectDrive is a registered trademark of Maxim Integrated

Products, Inc.

Windows Vista is a registered trademark of Microsoft Corp.

MAX9791

SPKR_EN

HP_EN

LDO_EN

BEEP

SPEAKER AND LDO

SUPPLY

2.7V TO 5.5V

HEADPHONE SUPPLY

2.7V TO 5.5V

AVDD

LDO

1.8V, 3.3V, OR 4.75V

CLASS D

AMP

CLASS D

AMP

Simplified Block Diagrams

Simplified Block Diagrams continued at end of data sheet.

Summary of content (34 pages)

PAGE 1
9-4217; Rev 1; 6/10 Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers Features o Windows Vista® Premium Compliant o Low EMI Filterless Class D Speaker Amplifiers Pass EN55022B Emissions Limit with 30cm of Speaker Cable o 180mW DirectDrive Headphone Amplifier o Excellent RF Immunity o Integrated 120mA LDO o Eliminates Headphone Ground Loop Noise o Wake-on-Beep Function o Click-and-Pop Suppression o Short-Circuit and Thermal-Overload Protection o Thermally Efficient, S
PAGE 2
MAX9791/MAX9792 Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers ABSOLUTE MAXIMUM RATINGS Supply Voltage (AVDD, PVDD, HPVDD to GND)........................-0.3V to +6.0V (AVDD to PVDD) .............................................................±0.3V GND to PGND, CPGND ......................................................±0.3V CPVSS, C1N to GND ............................................-6.0V to + 0.3V HPL, HPR to CPVSS ...........................................
PAGE 3
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers (VAVDD = VPVDD = VHPVDD = 5V, VGND = VPGND = VCPGND = 0, ILDO_OUT = 0, CLDO = 2µF (CLDO = 4µF for 1.8V LDO option), C1 = C2 = 1µF. RL = ∞, unless otherwise specified. RIN1 = 20kΩ (AVSPKR = 12dB), RIN2 = 40.2kΩ (AVHP = 0dB), CIN1 = 470nF, CIN2 = CCOM = 1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 4
MAX9791/MAX9792 Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers ELECTRICAL CHARACTERISTICS (continued) (VAVDD = VPVDD = VHPVDD = 5V, VGND = VPGND = VCPGND = 0, ILDO_OUT = 0, CLDO = 2µF (CLDO = 4µF for 1.8V LDO option), C1 = C2 = 1µF. RL = ∞, unless otherwise specified. RIN1 = 20kΩ (AVSPKR = 12dB), RIN2 = 40.2kΩ (AVHP = 0dB), CIN1 = 470nF, CIN2 = CCOM = 1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 5
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers (VAVDD = VPVDD = VHPVDD = 5V, VGND = VPGND = VCPGND = 0, ILDO_OUT = 0, CLDO = 2µF (CLDO = 4µF for 1.8V LDO option), C1 = C2 = 1µF. RL = ∞, unless otherwise specified. RIN1 = 20kΩ (AVSPKR = 12dB), RIN2 = 40.2kΩ (AVHP = 0dB), CIN1 = 470nF, CIN2 = CCOM = 1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 6
ELECTRICAL CHARACTERISTICS (continued) (VAVDD = VPVDD = VHPVDD = 5V, VGND = VPGND = VCPGND = 0, ILDO_OUT = 0, CLDO = 2µF (CLDO = 4µF for 1.8V LDO option), C1 = C2 = 1µF. RL = ∞, unless otherwise specified. RIN1 = 20kΩ (AVSPKR = 12dB), RIN2 = 40.2kΩ (AVHP = 0dB), CIN1 = 470nF, CIN2 = CCOM = 1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3) Note 3: All devices are 100% production tested at room temperature. All temperature limits are guaranteed by design.
PAGE 7
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers 2.0 OUTPUT POWER (W) 3.5 3.0 2.5 THD+N = 1% 2.0 1.5 1.5 THD+N = 10% 1.0 0.5 1.0 0.5 THD+N = 1% 0 0 10 1 10 1 100 OUTPUT POWER vs. LOAD RESISTANCE (MAX9791 SPEAKER MODE) 1.25 2.0 THD+N = 1% 1.5 1.0 110 MAX9791 toc08a THD+N = 10% VPVDD = VAVDD = 3.7V 100 RL = 8Ω 90 80 1.00 0.75 EFFICIENCY (%) OUTPUT POWER (W) 2.5 1.50 OUTPUT POWER (W) f = 1kHz EFFICIENCY vs.
PAGE 8
Typical Operating Characteristics (continued) (VAVDD = VPVDD = VHPVDD = 5V, VGND = VPGND = VCPGND = 0, ILDO_OUT = 0, CLDO = 2 x 1µF, C1 = C2 = 1µF. RL = ∞, unless otherwise specified. RIN1 = 20kΩ (AVSPKR = 12dB), RIN2 = 40.2kΩ (AVHP = 0dB), CIN1 = 470nF, CIN2 = CCOM = 1µF, measurement BW = 20kHz AES17, TA = +25°C, unless otherwise noted. Speaker mode: SPKR_EN = 0, HP_EN = 0. Headphone mode: SPKR_EN = 1, HP_EN = 1.) SPEAKER THD+N = 10% 2.0 1.5 1.0 THD+N = 1% 2.5 1.5 THD+N = 10% 1.0 THD+N = 1% 0.5 3.
PAGE 9
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers SPEAKER SPEAKER SHUTDOWN WAVEFORM SPEAKER STARTUP WAVEFORM MAX9791 toc14 MAX9791 toc13 SPKR_EN 2V/div SPEAKER OUT SPEAKER OUT 200µs/div 200µs/div WIDEBAND OUTPUT SPECTRUM (SPEAKER MODE) OUTPUT FREQUENCY SPECTRUM (SPEAKER MODE) -40 -50 -60 -70 -80 -90 -100 -40 -60 -80 -100 -120 RBW = 1kHz INPUT AC GROUNDED -110 -120 VOUT = -60dBV f = 1kHz RL = 8Ω UNWEIGHTED -20 OUTPUT MAGNITUDE (dBV) -10 -20 -30 MAX979
PAGE 10
Typical Operating Characteristics (continued) (VAVDD = VPVDD = VHPVDD = 5V, VGND = VPGND = VCPGND = 0, ILDO_OUT = 0, CLDO = 2 x 1µF, C1 = C2 = 1µF. RL = ∞, unless otherwise specified. RIN1 = 20kΩ (AVSPKR = 12dB), RIN2 = 40.2kΩ (AVHP = 0dB), CIN1 = 470nF, CIN2 = CCOM = 1µF, measurement BW = 20kHz AES17, TA = +25°C, unless otherwise noted. Speaker mode: SPKR_EN = 0, HP_EN = 0. Headphone mode: SPKR_EN = 1, HP_EN = 1.
PAGE 11
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers HEADPHONE THD+N = 1% 50 40 30 20 10 250 200 150 100 RL = 32Ω 50 100 10 150 MAX9791 toc28 RL = 32Ω 100 50 25 50 75 0 100 125 150 175 200 20 40 60 80 PER CHANNEL OUTPUT POWER (mW) PER CHANNEL OUTPUT POWER (mW) HEADPHONE OUTPUT POWER vs. HPVDD POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (HEADPHONE MODE) CROSSTALK vs.
PAGE 12
Typical Operating Characteristics (continued) (VAVDD = VPVDD = VHPVDD = 5V, VGND = VPGND = VCPGND = 0, ILDO_OUT = 0, CLDO = 2 x 1µF, C1 = C2 = 1µF. RL = ∞, unless otherwise specified. RIN1 = 20kΩ (AVSPKR = 12dB), RIN2 = 40.2kΩ (AVHP = 0dB), CIN1 = 470nF, CIN2 = CCOM = 1µF, measurement BW = 20kHz AES17, TA = +25°C, unless otherwise noted. Speaker mode: SPKR_EN = 0, HP_EN = 0. Headphone mode: SPKR_EN = 1, HP_EN = 1.
PAGE 13
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers LINE OUT -10 -20 RL = 10kΩ 10 -50 -60 FS = 707mVRMS -70 FS = 1VRMS 1 -40 THD+N (%) -40 -80 -50 -60 FS = 707mVRMS -70 FS = 1VRMS f = 6kHz 0.1 f = 100Hz 0.01 -80 -90 -90 -100 -100 -110 -110 0.1 0.01 1 10 100 0.001 f = 1kHz 0.0001 0.01 0.1 1 10 0 100 0.5 1.0 1.5 2.0 2.5 3.0 3.5 TOTAL HARMONIC DISTORTION + NOISE vs. OUTPUT POWER (HEADPHONE MODE) CROSSTALK vs.
PAGE 14
Typical Operating Characteristics (continued) (VAVDD = VPVDD = VHPVDD = 5V, VGND = VPGND = VCPGND = 0, ILDO_OUT = 0, CLDO = 2 x 1µF, C1 = C2 = 1µF. RL = ∞, unless otherwise specified. RIN1 = 20kΩ (AVSPKR = 12dB), RIN2 = 40.2kΩ (AVHP = 0dB), CIN1 = 470nF, CIN2 = CCOM = 1µF, measurement BW = 20kHz AES17, TA = +25°C, unless otherwise noted. Speaker mode: SPKR_EN = 0, HP_EN = 0. Headphone mode: SPKR_EN = 1, HP_EN = 1.
PAGE 15
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers LDO 1.0 0.5 0 -0.5 -1.0 -1.5 0.07 0.06 0.05 0.04 0.03 0.02 MAX9791 toc46 0.08 1.0 VLDO_OUT = 1.8V 0.5 VLDO_OUT = 3.3V 0 VLDO_OUT = 4.75V -0.5 0.01 -1.0 0 25 50 75 100 125 150 0 300 600 900 1200 AMPLIFIER OUTPUT POWER (mW) LDO DROPOUT VOLTAGE vs. LOAD LDO POWER-SUPPLY REJECTION RATIO vs. FREQUENCY MAX9791 toc47 40 LDO_OUT = 4.
PAGE 16
Typical Operating Characteristics (continued) (VAVDD = VPVDD = VHPVDD = 5V, VGND = VPGND = VCPGND = 0, ILDO_OUT = 0, CLDO = 2 x 1µF, C1 = C2 = 1µF. RL = ∞, unless otherwise specified. RIN1 = 20kΩ (AVSPKR = 12dB), RIN2 = 40.2kΩ (AVHP = 0dB), CIN1 = 470nF, CIN2 = CCOM = 1µF, measurement BW = 20kHz AES17, TA = +25°C, unless otherwise noted. Speaker mode: SPKR_EN = 0, HP_EN = 0. Headphone mode: SPKR_EN = 1, HP_EN = 1.
PAGE 17
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers PIN NAME 1 SPKR_INL FUNCTION 2 HP_INR Right-Channel Headphone Amplifier Input 3 HP_INL Left-Channel Headphone Amplifier Input 4 COM Common-Mode Voltage Sense Input 5 GND Signal Ground. Star connect to PGND. 6 LDO_OUT 7 AVDD 8 LDO_EN 9 HPR Right-Channel Headphone Amplifier Output 10 HPL Left-Channel Headphone Amplifier Output Left-Channel Speaker Amplifier Input LDO Output.
PAGE 18
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers MAX9791/MAX9792 MAX9792 Pin Description PIN NAME FUNCTION 1, 5 GND 2 HP_INR Right-Channel Headphone Amplifier Input 3 HP_INL Left-Channel Headphone Amplifier Input 4 COM 6 LDO_OUT Signal Ground. Star connect to PGND. Common-Mode Voltage Sense Input LDO Output. Bypass with two 1µF ceramic low ESR capacitors to GND. 7 AVDD 8 LDO_EN Positive Power Supply and LDO Input. Bypass with a 0.
PAGE 19
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers MAX9791/MAX9792 Table 1. Windows Premium Mobile Vista Specifications vs. MAX9791/MAX9792 Specifications DEVICE TYPE REQUIREMENT Analog Line-Out Jack (RL = 10kΩ, FS = 0.707VRMS) Analog Headphone-Out Jack (RL = 32Ω, FS = 0.
PAGE 20
VDD CLASS D EMI PLOT 40 EN55022B LIMIT 35 VOUT AMPLITUDE (dBµV/m) MAX9791/MAX9792 Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers VDD/2 30 25 GND 20 CONVENTIONAL AMPLIFIER BIASING SCHEME 15 +VDD 10 5 30 100 1000 FREQUENCY (MHz) VOUT GND Figure 2. EMI with 30cm of Speaker Cable In addition to active emission limiting, the MAX9791/ MAX9792 feature spread-spectrum modulation that flattens the wideband spectral components.
PAGE 21
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers MAX9791/MAX9792 RFHP CROSSTALK vs. GROUND RESISTANCE (RG) CIN2 -40 HP_INL HPL HPR CCOM COM RFHP SENSE RCOM RS = 5Ω RL = 32Ω -45 -50 CROSSTALK (dB) RIN2 -55 -60 -65 -70 CIN2 HP_INR -75 RIN2 -80 RFHP 0 0.025 0.050 0.075 0.100 0.125 0.150 RG (Ω) Figure 4. Connecting COM for Ground Sense Figure 5. Crosstalk vs.
PAGE 22
A qualified BEEP signal consists of a 3.3V typical, 215Hz minimum signal that is present at BEEP for four consecutive cycles. Once the first rising edge transition is detected at BEEP, the beep circuit wakes up and begins counting the beep cycles. Once four consecutive cycles of a qualified beep signal are counted, the device (speaker and headphone amplifiers) enables within 400µs. If the first rising edge is not followed by three consecutive rising edges within 16ms, the device remains shutdown (i.e.
PAGE 23
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers SINGLE CONTROL SPKR_EN CIN1 RIN1 SPKR_IN_ MONO CLASS D AMPLIFIER OUT_+ OUT_- HP_EN Figure 8. Enabling Either the Speaker or Headphone Amplifier with a Single Control Pin Click-and-Pop Suppression The MAX9791/MAX9792 feature a common-mode bias voltage of 0V. A 0V BIAS allows the MAX9791/MAX9792 to quickly turn on/off with no resulting clicks and pops.
PAGE 24
Setting Speaker Amplifier Gain External input resistors in conjunction with the internal feedback resistors (RFSPKR) set the speaker amplifier gain of the MAX9791/MAX9792. Set gain by using resistor RIN1 as follows (Figure 9): L1* MAX9791 MAX9792 ⎛ 20kΩ ⎞ A VSPKR = -4 ⎜ V/V ⎝ RIN1 ⎟⎠ where AVSPKR is the desired voltage gain. An RIN1 of 20kΩ yields a gain of 4V/V, or 12dB.
PAGE 25
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers -50 THD+N (dBFS) -60 -70 VOUT - -3dBFS FS = 1VRMS RL =32Ω AMPLITUDE (dBV) 0402 6.3V X5R 10% 1µF 0603 10V X5R 10% 1µF -80 0805 50V X7R 10% 1µF -90 0603 10V X7R 10% 1µF -100 10 100 1000 FREQUENCY (kHz) Figure 12. Input Coupling Capacitor-Induced THD+N vs. Frequency Component Selection Speaker Amplifier Power-Supply Input (PVDD) PVDD powers the speaker amplifiers. PVDD ranges from 2.7V to 5.5V.
PAGE 26
MAX9791/MAX9792 Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers Charge-Pump Output Capacitor (C2) Connect a 1µF capacitor between CPVSS and PGND. LDO Output Capacitor (CLDO) Connect 2 x 1µF capacitors between LDO_OUT and GND for 4.75V and 3.3V LDO options (MAX979_A and MAX979_B, respectively). Connect two parallel 2µF capacitors between LDO_OUT and GND for the 1.8V LDO option (MAX979_C).
PAGE 27
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers PGND 23 13 OUTR+ 24 OUTR- 25 MAX9791 PVDD 26 *EP SPKR_EN 27 + 1 2 3 4 5 6 7 SPKR_INL HP_INR HP_INL COM GND LDO_OUT AVDD SPKR_INR 28 PVDD HPVDD C1P 18 17 16 15 HP_EN 22 14 CPGND C1N PGND 23 13 C1N 12 CPVSS OUT+ 24 12 CPVSS 11 SENSE OUT- 25 11 SENSE 10 HPL PVDD 26 10 HPL 9 HPR SPKR_EN 27 9 HPR 8 LDO_EN SPKR_IN 28 8 LDO_EN MAX9792 *EP + TQFN (4mm x 4mm x 0.
PAGE 28
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers MAX9791/MAX9792 MAX9791A/MAX9791B Block Diagram 2.7V TO 5.5V 1.0µF 1.0µF 0.1µF 0.1µF PVDD AVDD 17, 26 7 CIN3 CIN1 RIN3 RIN1 CIN1 RIN1 CIN3 RIN3 MAX9791A MAX9791B 20kΩ SPKR_INL SPKR_INR 10µF 1 STEREO CLASS D AMPLIFIER 28 19 OUTL+ 18 OUTL- 24 OUTR+ 25 OUTR- 10 HPL 9 HPR 20kΩ CIN2 CIN2 RIN2 HP_INL 3 HP_INR 2 40.2kΩ TO HPVDD RIN2 2.7V TO 5.
PAGE 29
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers 2.7V TO 5.5V 1.0µF 1.0µF 0.1µF 0.1µF PVDD AVDD 17, 26 7 CIN3 CIN1 MAX9791C RIN3 RIN1 CIN1 RIN1 CIN3 RIN3 10µF 20kΩ SPKR_INL SPKR_INR 1 STEREO CLASS D AMPLIFIER 28 19 OUTL+ 18 OUTL- 24 OUTR+ 25 OUTR- 10 HPL 9 HPR 20kΩ CIN2 CIN2 RIN2 HP_INL 3 HP_INR 2 40.2kΩ TO HPVDD RIN2 2.7V TO 5.
PAGE 30
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers MAX9791/MAX9792 MAX9792A Block Diagram 2.7V TO 5.5V 1.0µF 1.0µF PVDD AVDD 17, 26 7 CIN3 CIN1 CIN2 CIN2 10µF 0.1µF 0.1µF MAX9792A RIN3 20kΩ RIN1 SPKR_IN RIN2 MONO CLASS D AMPLIFIER 28 HP_INL 3 HP_INR 2 19, 24 OUT+ 18, 25 OUT- 40.2kΩ TO HPVDD RIN2 10 HPL 9 HPR 2.7V TO 5.5V TO CPVSS LDO_EN 8 HP_EN 22 CONTROL µC BEEP INPUT BEEP 21 SPKR_EN 27 CCOM RCOM COM TO HPVDD 40.2kΩ 4 40.
PAGE 31
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers 2.7V TO 5.5V 1.0µF 1.0µF AVDD PVDD 7 CIN3 CIN1 CIN2 CIN2 10µF 0.1µF 0.1µF 17, 26 MAX9792C RIN3 20kΩ RIN1 SPKR_IN RIN2 MONO CLASS D AMPLIFIER 28 HP_INL 3 HP_INR 2 18, 25 OUT- 40.2kΩ 2.7V TO 5.5V 10 HPL 9 HPR TO CPVSS LDO_EN µC BEEP INPUT 8 HP_EN 22 BEEP 21 CONTROL SPKR_EN 27 CCOM RCOM COM TO HPVDD 40.2kΩ 4 40.2kΩ LDO_OUT 2.
PAGE 32
MAX9791/MAX9792 Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers Package Information For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. 32 PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.
PAGE 33
Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers ______________________________________________________________________________________ 33 MAX9791/MAX9792 Package Information (continued) For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only.
PAGE 34
MAX9791/MAX9792 Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers Revision History REVISION NUMBER REVISION DATE 0 11/08 1 6/10 DESCRIPTION Initial release PAGES CHANGED — Adding MAX9791C/MAX9792C versions 1–7, 10, 13–16, 19, 21–30 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.