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.