FEATURES

Delta-Sigma Digital-to-Analog Converters

− Dynamic Range (A-Weighted): 118dB

− THD+N: −100dB

Interpolation Filter

44.1kHz, and 48kHz Sampling Rates

− All-Channel Mute via the MUTE Input Pin

− Per-Channel Mute Available in Software

Mode

− Attenuation Range: 0dB to −119.5dB

− 256 Steps with 0.5dB per Step

− Supports Left-Justified, Right-Justified,

E, and TDM Data Formats

− Accepts 16-, 18-, 20, and 24-Bit Two’s

Complement PCM Audio Data

Configuration Modes

Port Provides Control Register Access in

Software Mode

APPLICATIONS

DESCRIPTION

The PCM4108 is a high-performance, eight-channel

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

professional audio applications. The PCM4108 supports

16- to 24-bit linear PCM input data, with sampling

frequencies up to 216kHz. The PCM4108 features lower

power consumption, making it ideal for use in high channel

count applications by lowering the overall power budget

required for the D/A conversion sub-system.

The

PCM4108

features

a

multi-bit

delta-sigma

architecture, followed by a switched capacitor output filter.

This architecture yields lower out-of-band noise and a high

tolerance to system clock phase jitter. Differential voltage

outputs are provided for each channel and are well-suited

to high-performance audio applications. The differential

outputs are easily converted to a single-ended output

using an external op amp IC.

The PCM4108 includes a flexible audio serial port

interface, which supports standard and time division

multiplexed (TDM) formats. In addition, the PCM4108

offers

two

configuration

modes:

Standalone

and

Software-Controlled. The Standalone mode provides

dedicated control pins for configuring a subset of the

available PCM4108 functions, while Software mode

utilizes a serial peripheral interface (SPI) port for

accessing the complete feature set via internal control

registers.

The PCM4108 operates from a +5V analog power supply

and a +3.3V digital power supply. The digital I/O is

compatible with +3.3V logic families. The PCM4108 is

available in a 64-lead HTQFP package.

All trademarks are the property of their respective owners.

PCM4108

SBAS354 − JUNE 2005

HighPerformance, 24Bit, 216kHz Sampling, EightChannel Audio

DigitaltoAnalog Converter

PRODUCT PREVIEW information concerns products in the formative or design

phase of development. Characteristic data and other specifications are design

goals. Texas Instruments reserves the right to change or discontinue these

products without notice.

www.ti.com

Copyright

 2005, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments

semiconductor products and disclaimers thereto appears at the end of this data sheet.