PCM4202DB datasheet(12/32 Pages) TI2

12 / 32 page

PCM4202

SBAS290B − JULY 2003 − SEPTEMBER 2004

www.ti.com

PRODUCT OVERVIEW

The PCM4202 is a high-performance, stereo audio

analog-to-digital (A/D) converter designed for use in

professional and broadcast audio applications. The

PCM4202 features 24-bit linear PCM or 1-bit Direct

Stream Digital (DSD) data output capability for both

channels. Sampling rates up to 216kHz are supported for

PCM output formats, while 64x or 128x oversampled 1-bit

data is supported for DSD output mode. Native support for

both PCM and DSD data formats makes the PCM4202

ideal for use in a wide variety of audio recording and

processing applications.

The PCM4202 features 1-bit delta-sigma modulators

employing density modulated dither for improved dynamic

performance. Differential voltage inputs are utilized for the

modulators, providing excellent common-mode rejection.

On-chip

voltage

references

are

provided

for

the

modulators, in addition to generating DC common-mode

bias voltage outputs for use with external input circuitry.

Linear phase digital decimation filtering is provided for the

24-bit PCM data outputs, with a minimum stop band

attenuation of −100dB for all sampling modes.

The PCM output mode features clipping flag outputs for

each channel, as well as a digital high-pass filter for DC

removal. The PCM4202 may be configured using

dedicated input pins for sampling mode and audio data

format selection, high-pass filter enable/disable, and

reset/power-down operation.

A +5V power supply is required for the analog section of

the device, while a +3.3V power supply is required for the

digital circuitry. Figure 1 shows the functional block

diagram for the PCM4202.

HPF

Delta−Sigma

Modulator

Decimation

Filter

Voltage

Reference

COMR

AGNDR

REFR

INR+

INR−

Power

AGND

Reset

Logic

Clock

Control

Audio

Serial

Port

DGND

LRCK

or DSDBCK

BCK

or DSDL

DATA

or DSDR

S/M

FMT0

FMT1

CLIPR

CLIPL

HPF

Delta−Sigma

Modulator

Decimation

Filter

Voltage

Reference

REFL

AGNDL

COML

INL−

INL+

FS1

FS2

SCKI

RST

HPFD

FS0

Figure 1. PCM4202 Functional Block Diagram

PCM4202DB Datasheet(PDF) 12 Page - Texas Instruments

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