MAX9790AETJ+ Maxim Integrated Products, MAX9790AETJ+ Datasheet

MAX9790AETJ+

Manufacturer Part Number

MAX9790AETJ+

Description

IC AMP AUDIO 2W STER AB 32TQFN

Manufacturer

Maxim Integrated Products

Series

DirectDrive™r

Type

Class ABr

Datasheets

1.MAX9790AETJ.pdf (26 pages)

2.MAX9790AETJ.pdf (28 pages)

3.MAX9790AETJ.pdf (26 pages)

Specifications of MAX9790AETJ+

Output Type

2-Channel (Stereo) with Stereo Headphones

Max Output Power X Channels @ Load

2W x 2 @ 4 Ohm; 100mW x 2 @ 16 Ohm

Voltage - Supply

4.5 V ~ 5.5 V

Features

Depop, Mute, Short-Circuit and Thermal Protection, Shutdown

Mounting Type

Surface Mount

Package / Case

32-TQFN Exposed Pad

For Use With

MAX9789AEVKIT+ - EVALUATION KIT FOR MAX9789A

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current page: 1 of 26
Download datasheet (2Mb)

19-0606; Rev 0; 9/06

The MAX9789A/MAX9790A combine a stereo, 2W Class

AB speaker power amplifier with a stereo 100mW

DirectDrive™ headphone amplifier in a single device.

The MAX9789A/MAX9790A 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 patented

DirectDrive architecture that produces a ground-refer-

enced 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-distor-

tion amplification 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 MAX9789A features an internal LDO that can be

used as a clean power supply for a CODEC or other cir-

cuits. The LDO output voltage is set internally at 4.75V or

can be adjusted between 1.21V and 4.75V using a sim-

ple resistive divider. The LDO is protected against ther-

mal overloads and short circuits while providing 120mA

of continuous output current and can be enabled inde-

pendently of the audio amplifiers.

By disabling the speaker and headphone amplifiers, and

the LDO (for MAX9789A), the MAX9789A/MAX9790A

enter low-power shutdown mode and draw only 0.3µA.

The MAX9789A/MAX9790A operate from a single 4.5V

to 5.5V supply and feature thermal-overload and out-

put short-circuit protection. Devices are specified over

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

Pin Configurations appear at end of data sheet.

† U.S. Patent # 7,061,327

Windows Vista is a trademark of Microsoft Corp.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Windows Vista-Compliant, Stereo Class AB Speaker

Notebook Computers

Tablet PCs

Portable Multimedia Players

Amplifiers and DirectDrive Headphone Amplifiers

________________________________________________________________ Maxim Integrated Products

General Description

Applications

†

o Microsoft Windows Vista Compliant

o Class AB 2W Stereo BTL Speaker Amplifier

o 100mW DirectDrive Headphone Amplifier

o Excellent RF Immunity

o Integrated 120mA LDO (MAX9789A)

o High +90dB PSRR, Low 0.002% THD+N

o Low-Power Shutdown Mode

o Click-and-Pop Suppression

o Short-Circuit and Thermal-Overload Protection

o ±8kV ESD-Protected Headphone Driver Outputs

o Available in 32-Pin Thin QFN (5mm x 5mm x

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

temperature range.

+ Denotes lead-free package.

* EP = Exposed paddle.

MAX9789AETJ+

MAX9790AETJ+

Simplified Block Diagrams continued at end of data sheet.

Eliminates Costly, Bulky DC-Blocking Capacitors

0.8mm) Package

4.5V TO 5.5V

SPKR_INR

SPKR_INL

HP_INR

HP_INL

PART

Simplified Block Diagrams

SPEAKER SUPPLY

SPKR_EN

MUTE

4.5V TO 5.5V

HP_EN

GAIN1

GAIN2

MAX9789A

PIN-PACKAGE

32 Thin QFN-EP*

Ordering Information

HEADPHONE SUPPLY

LDO

3.0V TO 5.5V

INTERNAL

1.21V TO 4.75V

LDO

Yes

Features

T3255N-1

CODE

PKG

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