MAX9775

更新时间： 2024-11-05 04:41:31

品牌	Logo	应用领域
美信 - MAXIM		放大器
页数	文件大小	规格书
37页	557K
描述
2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier

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MAX9775 数据手册

19-0746; Rev 1; 7/07

2 x 1.5W, Stereo Class D Audio Subsystem

with DirectDrive Headphone Amplifier

5/MAX976

General Description

Features

o Unique Spread-Spectrum Modulation and Active

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.

Emissions Limiting Significantly Reduces EMI

o 3D Stereo Enhancement (MAX9775 Only)

o Up to 3 Stereo Inputs

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.

o 1.5W Stereo Speaker Output (4Ω, V

= 5V)

o 50mW Mono Receiver/Stereo Headphone Outputs

(32Ω, V = 3.3V)

o High PSRR (68dB at 217Hz)

o 79% Efficiency (V

= 3.3V, R = 8Ω, P

OUT

470mW)

o I²C Control—Input Configuration, Volume Control,

Output Mode

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 I²C.

o Click-and-Pop Suppression

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

o Current-Limit and Thermal Protection

Ordering Information

PIN-

PACKAGE

PKG

CODE

CLASS D

AMPLIFIER

PART

The mono receiver amplifier and stereo headphone

amplifier use Maxim’s patented^†DirectDrive architecture

that produces a ground-referenced output from a single

supply, eliminating the need for large DC-blocking

capacitors, saving cost, space, and component height.

MAX9775ETJ+*

32 TQFN-EP** T3255-4

B36-4

32 TQFN-EP** T3255-4

MAX9776EBX+T 32 UCSP-32 B36-4

Stereo

Mono

MAX9775EBX+T* 32 UCSP-32

MAX9776ETJ+

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.

Applications

Cell Phones

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.

Portable Multimedia Players

Handheld Gaming Consoles

UCSP is a trademark of Maxim Integrated Products, Inc.

†

U.S. Patent# 7,061,327

Simplified Block Diagrams

SINGLE SUPPLY 2.7V TO 5.5V

SOUND

CONTROL

GAIN

CONTROL

GAIN

CONTROL

MIXER/

MUX

MIXER/

MUX

I C

INTERFACE

MAX9775

MAX9776

________________________________________________________________ Maxim Integrated Products

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.

12 3 4 5 6 7...37

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与MAX9775相关器件

型号	品牌	获取价格	描述	数据表
MAX9775_V01	MAXIM	获取价格	2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier
MAX9775EBX+	MAXIM	获取价格	Audio Amplifier, 3 Func, BICMOS, PBGA36
MAX9775EBX+T	MAXIM	获取价格	2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier
MAX9775EBX+T*	MAXIM	获取价格	2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier
MAX9775ETJ+	MAXIM	获取价格	2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier
MAX9775ETJ+*	MAXIM	获取价格	2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier
MAX9776	MAXIM	获取价格	2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier
MAX9776EBX+T	MAXIM	获取价格	2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier
MAX9776EBX+TG45	MAXIM	获取价格	Volume Control Circuit
MAX9776ETJ+	MAXIM	获取价格	2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier

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