MAX9776 Maxim Integrated Products, MAX9776 Datasheet

MAX9776

Manufacturer Part Number

MAX9776

Description

(MAX9775 / MAX9776) Stereo Class D Audio Subsystem

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX9776.pdf (37 pages)

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Bonase Electronics (HK) Co., Limited

Part Number:

MAX9776ETJ

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MAXIM

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The MAX9775/MAX9776 combine a high-efficiency

Class D, stereo/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 MAX9775/MAX9776 deliver

1.5W per channel into a 4Ω load from a 5V supply and

offer efficiencies up to 79%. Active emissions limiting

circuitry and spread-spectrum modulation greatly

reduce EMI, eliminating the need for output filtering

found in traditional Class D devices.

The MAX9775/MAX9776 utilize a fully differential archi-

tecture, a full-bridged output, and comprehensive click-

and-pop suppression. A 3D stereo enhancement

function allows the MAX9775 to widen the stereo sound

field immersing the listener in a cleaner, richer sound

experience than typically found in portable applications.

The devices utilize a flexible, user-defined mixer archi-

tecture that includes an input mixer, volume control, and

output mixer. All control is done through I

The mono receiver amplifier and stereo headphone

amplifier use Maxim’s patented

that produces a ground-referenced output from a single

supply, eliminating the need for large DC-blocking

capacitors, saving cost, space, and component height.

The MAX9775/MAX9776 are available in a 32-pin TQFN

(5mm x 5mm) or a 32-bump UCSP™ (3mm x 3mm)

package and specified over the extended -40°C to

+85°C temperature range.

19-0746; Rev 1; 7/07

†

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.

U.S. Patent# 7,061,327

Cell Phones

Portable Multimedia Players

Handheld Gaming Consoles

2 x 1.5W, Stereo Class D Audio Subsystem

________________________________________________________________ Maxim Integrated Products

INTERFACE

CONTROL

GAIN

General Description

with DirectDrive Headphone Amplifier

SINGLE SUPPLY 2.7V TO 5.5V

MAX9775

MIXER/

MUX

†

DirectDrive architecture

Applications

CONTROL

SOUND

o Unique Spread-Spectrum Modulation and Active

o 3D Stereo Enhancement (MAX9775 Only)

o Up to 3 Stereo Inputs

o 1.5W Stereo Speaker Output (4Ω, V

o 50mW Mono Receiver/Stereo Headphone Outputs

o High PSRR (68dB at 217Hz)

o 79% Efficiency (V

o I

o Click-and-Pop Suppression

o Low Total Harmonic Distortion (0.03% at 1kHz)

o Current-Limit and Thermal Protection

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

ating temperature range.

+ Denotes lead-free package.

* Future product—contact factory for availability.

** EP = Exposed pad.

Pin Configurations appear at end of data sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

MAX9775ETJ+*

MAX9775EBX+T*

MAX9776ETJ+

MAX9776EBX+T

Emissions Limiting Significantly Reduces EMI

(32Ω, V

470mW)

Output Mode

C Control—Input Configuration, Volume Control,

PART

INTERFACE

CONTROL

GAIN

Simplified Block Diagrams

= 3.3V)

SINGLE SUPPLY 2.7V TO 5.5V

PIN-

PACKAGE

32 TQFN-EP**

32 UCSP-32

32 TQFN-EP**

32 UCSP-32

MAX9776

MIXER/

MUX

Ordering Information

= 3.3V, R

T3255-4

CODE

B36-4

PKG

= 8Ω, P

Features

= 5V)

OUT

AMPLIFIER

CLASS D

Stereo

Mono

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