Stereo Audio

DIGITAL-TO-ANALOG CONVERTER

With Programmable PLL

TM

49%

FPO

PCM1723

FEATURES

q ACCEPTS 16-, 20-, OR 24-BIT INPUT DATA

q COMPLETE STEREO DAC: Includes Digital Filter

and Output Amp

q DYNAMIC RANGE: 94dB

q MULTIPLE SAMPLING FREQUENCIES:

16kHz, 22.05kHz, 24kHz

32kHz, 44.1kHz, 48kHz

64kHz, 88.2kHz, 96kHz

q PROGRAMMABLE PLL CIRCUIT:

256fS/384fS from 27MHz Master Clock

q NORMAL OR I2S™ DATA INPUT FORMATS

q SELECTABLE FUNCTIONS:

Soft Mute

Digital Attenuator (256 Steps)

Digital De-emphasis

q OUTPUT MODE: Left, Right, Mono, Mute

DESCRIPTION

The PCM1723 is a complete, low-cost, stereo audio

digital-to-analog converter (DAC) with a phase-locked

loop (PLL) circuit included. The PLL derives either a

256fS or 384fS system clock from an external 27MHz

reference frequency. The DAC contains a 3rd-order

delta-sigma (

∆Σ) modulator, a digital interpolation filter,

and an analog output amplifier. The PCM1723 can

accept 16-, 20-, or 24-bit input data in either normal or

I2S formats.

The digital filter performs an 8X interpolation function

and includes selectable features such as soft mute,

digital attenuation and digital de-emphasis. The PLL

can be programmed for sampling at standard digital

audio frequencies as well as one-half and double

sampling frequencies.

The PCM1723 is ideal for applications which combine

compressed audio and video data such as DVD, DVD-

ROM, set-top boxes and MPEG sound cards.

Serial

Input

I/F

Mode

Control

I/F

8X Oversampling

Digital Filter

with Function

Controller

PLL

OSC

256f

S/384fS

V

CP

PGND V

CC

AGND

Multi-level

Delta-Sigma

Modulator

V

OUTL

CAP

Open Drain

DAC

Multi-level

Delta-Sigma

Modulator

Low-Pass

Filter

Low-Pass

Filter

BPZ-Cont.

V

OUTR

ZERO

DAC

MC

MD

ML

LRCIN

DIN

BCKIN

RSTB

Power Supply

XTI XTO

V

DD

DGND

MCKO

SCKO

PCM1723E

SBAS057A – JANUARY 1996 – REVISED MAY 2007

www.ti.com

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright © 1996-2007, Texas Instruments Incorporated

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.

SoundPLUS is a trademark of Texas Instruments.

I2S is a trademark of NXP Semiconductors.

All other trademarks are the property of their respective owners.