PCM4104 datasheet(13/40 Pages) TI2

13 / 40 page

PCM4104

SBAS291C − AUGUST 2003 − REVISED DECEMBER 2004

www.ti.com

PRODUCT OVERVIEW

The PCM4104 is a high-performance, four-channel D/A

converter designed for professional audio systems. The

PCM4104 supports 16- to 24-bit linear PCM input data and

sampling frequencies up to 216kHz. The PCM4104

utilizes an 8x oversampling digital interpolation filter,

followed by a multi-level delta-sigma modulator with a

single

pole

switched

capacitor

output

filter.

This

architecture provides excellent dynamic and sonic

performance, as well as high tolerance to clock phase

jitter.

Functional

block

diagrams,

showing

both

Standalone and Software modes, are shown in Figure 1

and Figure 2.

The PCM4104 incorporates a flexible audio serial port,

which accepts 16- to 24-bit PCM audio data in both

standard audio formats (Left Justified, Right Justified, and

Philips I2S) and TDM data formats. The TDM formats are

especially useful for interfacing to the synchronous serial

ports of digital signal processors. The TDM formats

support daisy-chaining of two PCM4104 devices on a

single three-wire serial interface (for sampling frequencies

up to 108kHz), forming a high-performance eight-channel

D/A conversion system.

The PCM4104 offers two modes for configuration control:

Software and Standalone. Software mode makes use of a

four-wire SPI port to access internal control registers,

allowing configuration of the full PCM4104 feature set.

Standalone mode offers a more limited subset of the

functions available in Software mode, while allowing for a

simplified pin-programmed configuration mode.

Digital

Filtering

and

Functions

Audio

Serial

Port

Control

REF1+

OUT1+

OUT1−

REF1−

REF2+

OUT2+

OUT2−

REF2−

COM1

REF3+

OUT3+

OUT3−

REF3−

REF4+

OUT4+

OUT4−

REF4−

COM2

Digital

Power

Analog

Power

System Clock

and

Timing

CC1

AGND1

CC21

AGND2

DGND

D/A Converter

and

Output Filter

D/A Converter

and

Output Filter

D/A Converter

and

Output Filter

D/A Converter

and

Output Filter

LRCK

BCK

DATA0

DATA1

SCKI

RST

MUTE

DEM0

DEM1

SUB

FMT0

FMT1

FMT2

FS0

FS1

MODE

Figure 1. Functional Block Diagram for Standalone Mode

PCM4104 Datasheet(PDF) 13 Page - Texas Instruments

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