HPF

Delta- Sigma

Modulator

Decim ation

Filter

Voltage

Reference

V

AGNDR

V

V

V

-

Power

V

DD

AGND

Reset

Logic

Clock

Control

Audio

Serial

Port

DGND

V

CC

LRCK

or DSDBCK

BCK

or DSDL

DATA

or DSDR

S/M

FMT0

FMT1

CLIPR

CLIPL

HPF

Delta- Sigma

Modulator

Decim ation

Filter

Voltage

Reference

V

AGND L

V

V

-

V

FS1

FS2

SCKI

RST

HPFD

FS0

PCM4202-EP

www.ti.com

SGLS388

– JUNE 2007

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 216 kHz are supported for PCM

output formats, while 64

× or 128× 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

–100 dB 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 5 V power supply is required for the analog section of the device, while a 3.3-V power supply is required for the

digital circuitry. Figure 1 shows the functional block diagram for the PCM4202.

Figure 1. PCM4202 Functional Block Diagram

Copyright

© 2007, Texas Instruments Incorporated

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Product Folder Link(s): PCM4202-EP