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PRODUCT OVERVIEW

Digital

Filtering

and

Functions

Audio

Serial

Port

Control

V

V

V

V

V

V

V

V

V

V

V

V

V

V

V

V

V

V

Digital

Power

Analog

Power

System Clock

and

Timing

V

AGND1

V

AGND2

V

DD

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

PCM4104-EP

SBAS419 – JUNE 2007

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 216 kHz. The PCM4104

utilizes an 8

× 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

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 108 kHz), 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.

Figure 1. Functional Block Diagram for Standalone Mode

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