TAS5704

www.ti.com

SLOS563A – MARCH 2008 – REVISED AUGUST 2010

20-W Stereo Digital Audio Power Amplifier With Feedback

Check for Samples: TAS5704

1

FEATURES

2

•

Audio Input/Output

•

Thermal and Short-Circuit Protection

–

20-W into an 8-

Ω Load From an 18-V Supply

spacer

DESCRIPTION

–

Two Serial Audio Inputs (Four Audio

Channels)

The TAS5704 is a 20-W, efficient, digital audio power

amplifier for driving stereo bridge-tied speakers. Two

–

Supports Multiple Output Configurations:

serial data inputs allow processing of up to four

–

2-Ch Bridged Outputs (20 W × 2)

discrete audio channels and seamless integration to

–

4-Ch Single-Ended Outputs (10 W × 4)

most digital audio processors accepting a wide range

–

2-Ch Single-Ended + 1-Ch Bridged (2.1)

of

input

data

and

clock

rates.

A

hardware

configurable data path allows these channels to be

(10 W × 2 + 20 W)

routed to the internal speaker drivers or output via the

•

Closed Loop Power Stage Architecture

subwoofer PWM outputs.

–

Improved PSRR Reduces Power Supply

The TAS5704 is a slave-only device receiving all

Performance Requirements

clocks from external sources. The TAS5704 operates

–

Higher Damping Factor Provides for

at a 384-kHz switching rate for 32-, 48-, 96-, and

Tighter, More Accurate Sound With

192-kHz data, and at a 352.8 kHz switching rate for

Improved Bass Response

44.1-,

88.2-,

and

176.4-kHz

data.

The

8×

oversampling combined with the fourth-order noise

–

Lower EMC Emissions

shaper provides a flat noise floor and excellent

–

Output Power is Independent of Supply

dynamic range from 20 Hz to 20 kHz.

Voltage Variation

The

closed-loop

architecture

of

the

TAS5704

•

Wide PVCC Range From (10 V to 26 V)

provides several benefits. The high power supply

•

Supports 32-kHz–192-kHz (DVD-Audio) Sample

rejection enables superior audio performance from a

noisy, low cost supply. The high damping factor

•

Line-Level Subwoofer PWM Outputs

allows

tighter

control

over

speaker

movement

resulting in an improved bass response. Finally,

•

Audio/PWM Processing (Hardware Controlled)

switching edge rate control lowers EMC emissions

–

4-Step Gain Control (-3dB, 3dB, 9dB, 12dB)

without sacrificing audio performance.

–

Soft Mute Control (50% Output Duty Cycle)

•

Factory-Trimmed Internal Oscillator Enables

Automatic Detection of Incoming Sample

Rates

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

System Two, Audio Precision are trademarks of Audio Precision, Inc.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008–2010, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.