FEATURES

16-BIT DELTA-SIGMA DAC AND ADC

DESIGNED FOR MODEM ANALOG FRONT END:

Supports up to 56kbps Operation

ANALOG PERFORMANCE:

Sampling Frequency: 7.2kHz to 26kHz

Dynamic Range: 88dB (typ) at fS = 8kHz, fIN = 1kHz

SYSTEM CLOCK: 512fS

MASTER OR SLAVE OPERATION

ON-CHIP CRYSTAL OSCILLATOR CIRCUIT

ADC-TO-DAC LOOP-BACK MODE

TIME SLOT MODE SUPPORTS UP TO

FOUR CODECs ON A SINGLE SERIAL

INTERFACE

POWER-DOWN MODE: 60mA (typ)

POWER SUPPLY: Single +2.7V to +3.6V

SMALL PACKAGE: SSOP-24

APPLICATIONS

SOFTWARE MODEMS FOR:

Personal Digital Assistant

Notebook and Hand-Held PCs

Set-Top Box

Digital Television

Embedded Systems

PORTABLE VOICE RECORDER/PLAYER

SPEECH RECOGNITION/SYNTHESIS

TELECONFERENCING PRODUCTS

DESCRIPTION

The PCM3500 is a low cost, 16-bit CODEC designed

for modem Analog Front End (AFE) and speech processing

applications. The PCM3500’s low power operation

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

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

portable applications.

The PCM3500 integrates all of the functions needed for

a modem or voice CODEC, including delta-sigma

digital-to-analog and analog-to-digital converters, input

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

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

serial interface provides for a simple, or glue-free

interface to popular DSP and RISC processors. The

serial interface also supports Time Division Multiplexing

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

single 4-wire serial bus.