TAS5721 datasheet(2/71 Pages) TI1

2 / 71 page

Digital Audio

Processor

(DAP)

I C Control Port

Internal Register/State Machine Interface

Stereo Headphone

Amplifier

PVDD

DVDD

MCLK Monitoring

and Watchdog

Charge Pump

AVDD

PDN

RST

SPK_OUTA

SPK_OUTD

SDIN

MCLK

SCLK

LRCLK

DR_INA

DR_INB

DR_VSS

DR_OUTA

DR_OUTB

TAS5721

SCL

SDA

Serial Audio Port

(SAP)

Sample Rate

Auto-Detect

PLL

Open Loop 4 Channel

PWM Amplifier

Sensing and

Protection

Temperature

Short Circuits

PVDD Voltage

Output Current

Fault Notification

SPK_OUTB

SPK_OUTC

Sample Rate

Converter

(SRC)

Digital to PWM

Converter

(DPC)

Click and Pop

Suppression

3 Ch. PWM

Modulator

Noise Shaping

Power-On Reset

(POR)

Internal Voltage Supplies

Internal Regulation and Power Distribution

DR_CP

DR_CN

DRVDD

TAS5721

SLOS739 – JULY 2012

www.ti.com

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

DESCRIPTION

The TAS5721 is an efficient, digital-input audio amplifier for driving 2.0 speaker systems configured as a bridge

tied load (BTL), 2.1 systems with two satellite speakers and one subwoofer, or in PBTL systems driving a single

speaker configured as a parallel bridge tied load (PBTL). One serial data input allows processing of up to two

discrete audio channels and seamless integration to most digital audio processors and MPEG decoders. The

device accepts a wide range of input data formats and sample rates. A fully programmable data path routes

these channels to the internal speaker drivers.

The TAS5721 is a slave-only device, receiving all clocks from external sources. The TAS5721 operates with a

PWM carrier frequency between a 384-kHz switching rate and a 288-KHz switching rate, depending on the input

sample rate. Oversampling, combined with a fourth-order noise shaper, provides a flat noise floor and excellent

dynamic range from 20 Hz to 20 kHz.

An integrated ground centered DirectPath™ combination headphone amplifier and 2VRMS line driver is integrated

in the TAS5721.

Figure 1. DAP Process Structure

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