®

1

PCM3501

FEATURES

q 16-BIT DELTA-SIGMA DAC AND ADC

q DIFFERENTIAL INPUT AND OUTPUT

q DESIGNED FOR MODEM ANALOG FRONT END:

Supports up to 56kbps Operation

q ANALOG PERFORMANCE:

Sampling Frequency: 7.2kHz to 26kHz

q SYSTEM CLOCK: 512f

S

q MASTER OR SLAVE OPERATION

q ON-CHIP CRYSTAL OSCILLATOR CIRCUIT

q ADC-TO-DAC LOOP-BACK MODE

q TIME SLOT MODE SUPPORTS UP TO

FOUR CODECs ON A SINGLE SERIAL

INTERFACE

DESCRIPTION

The PCM3501 is a low cost, 16-bit CODEC designed

for modem Analog Front End (AFE) and speech pro-

cessing applications. The PCM3500’s low power op-

eration from +2.7V to +3.6V power supplies, along

with an integrated power-down mode, make it ideal for

portable applications.

The PCM3501 integrates all of the functions needed for

a modem or voice CODEC, including delta-sigma

© 1999 Burr-Brown Corporation

PDS-1569A

Printed in U.S.A. December, 1999

PCM3501

®

Low Voltage, Low Power, 16-Bit, Mono

VOICE/MODEM CODEC

APPLICATIONS

q SOFTWARE MODEMS FOR:

Personal Digital Assistant

Notebook and Hand-Held PCs

Set-Top Box

Digital Television

Embedded Systems

q PORTABLE VOICE RECORDER/PLAYER

q SPEECH RECOGNITION/SYNTHESIS

q TELECONFERENCING PRODUCTS

TM

digital-to-analog and analog-to-digital converters, in-

put anti-aliasing filter, digital high-pass filter for DC

blocking, and an output low-pass filter. The synchro-

nous serial interface provides for a simple, or glue-free

interface to popular DSP and RISC processors. The

serial interface also supports Time Division Multiplex-

ing (TDM), allowing up to four CODECs to share a

single 4-wire serial bus.

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111

Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

q POWER-DOWN MODE: 60

q SINGLE +2.7V TO +3.6V POWER SUPPLY

q SMALL PACKAGE: 24-Lead SSOP

PCM3501

Interpolation

Digital Filter

Mode Control

Decimation

Digital Filter

Reference

AAF

HPF

M/S

HPFD

TSC

XTI

XTO

LOOP

V

V

COM

V

V

IN+

V

IN–

PDWN

Power

DGND

AGND

V

DD

V

CC

Loop

FS

BCK

DIN

DOUT

FSO

SCKIO

Clock

Gen/

OSC

∆Σ

Modulator

(ADC)

∆Σ

Modulator

SMF

V

OUT+

V

OUT–

Multi-Level

DAC

SBAS137