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PCM1738

PC

M

173

8

www.ti.com

24-Bit, 192kHz Sampling,

Advanced Segment, Audio-Stereo

DIGITAL-TO-ANALOG CONVERTER

FEATURES

24-BIT RESOLUTION

ANALOG PERFORMANCE (V

CC

= +5V):

Dynamic Range: 117dB typ

SNR: 117dB typ

THD+N: 0.0004% typ

Full-Scale Output: 2.2Vrms (at post amp)

DIFFERENTIAL CURRENT OUTPUT: 2.48mA

SAMPLING FREQUENCY: 10kHz to 200kHz

SYSTEM CLOCK: 128, 192, 256, 384, 512,

or 768f

S

with Auto Detect

ACCEPTS 16-, 20-, AND 24-BIT AUDIO DATA

DATA FORMATS: Standard, I

2

S, and Left-

Justified

8x OVERSAMPLING DIGITAL FILTER:

Stopband Attenuation: 鈥?2dB

Passband Ripple: 0.002dB

OPTIONAL INTERFACE TO EXTERNAL

DIGITAL FILTER AVAILABLE

OPTIONAL INTERFACE TO DSD DE-

CODER FOR SACD PLAYBACK

USER-PROGRAMMABLE MODE CONTROLS:

Digital Attenuation: 0dB to 鈥?20dB, 0.5dB/Step

Digital De-Emphasis

Digital Filter Roll-Off: Sharp or Slow

Soft Mute

Zero Detect Mute

Zero Flags for Each Output

DUAL-SUPPLY OPERATION:

+5V Analog, +3.3V Digital

5V TOLERANT DIGITAL INPUTS

SMALL SSOP-28 PACKAGE

APPLICATIONS

AV RECEIVERS

DVD MOVIE PLAYERS

SACD PLAYERS

HDTV RECEIVERS

CAR AUDIO SYSTEMS

DIGITAL MULTI-TRACK RECORDERS

OTHER MULTICHANNEL AUDIO SYSTEMS

DESCRIPTION

The PCM1738 is a CMOS, monolithic, Integrated Cir-

cuit (IC) that includes stereo Digital-to-Analog Convert-

ers (DACs) and support circuitry in a small SSOP-28

package. The data converters utilize a newly developed

advanced segment DAC architecture to achieve excel-

lent dynamic performance and improved tolerance to

clock jitter. The PCM1738 provides balanced current

outputs, allowing the user to optimize analog perfor-

mance externally, and accepts industry standard audio

data formats with 16- to 24-bit data, providing easy

interfacing to audio DSP and decoder chips. Sampling

rates up to 200kHz are supported. The PCM1738 also

has two optional modes of operation: an external digital-

filter mode (for use with the DF1704, DF1706, and

PMD200), and a DSD decoder interface for SACD

playback applications. A full set of user-programmable

functions are accessible through a 4-wire serial control

port that supports register write and read functions.

Copyright 漏 2000, Texas Instruments Incorporated

SBAS174B

Printed in U.S.A. February, 2002

next

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