PCM1742
www.ti.com
SBAS176A – DECEMBER 2000 – REVISED APRIL 2005
24-Bit, 192-kHz Sampling, Enhanced Multilevel, Delta-Sigma,
Audio Digital-to-Analog Converter
FEATURES
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24-Bit Resolution
Analog Performance (V
CC
= 5 V):
– Dynamic Range:
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106 dB, Typical (PCM1742KE)
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100 dB, Typical (PCM1742E)
– SNR:
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106 dB, Typical (PCM1742KE)
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100 dB, Typical (PCM1742E)
– THD+N:
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0.002%, Typical (PCM1742KE)
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0.003%, Typical (PCM1742E)
– Full-Scale Output: 3.1 V
p-p
, Typical
4x/8x Oversampling Digital Filter:
Stop-Band Attenuation: –55 dB
Pass-Band Ripple: ±0.03 dB
Sampling Frequency: 5 kHz to 200 kHz
System Clock: 128 f
S
, 192 f
S
, 256 f
S
, 384 f
S
,
512 f
S
, 768 f
S
With Autodetect
Accepts 16-, 18-, 20-, and 24-Bit Audio Data
Data Formats: Standard, I
2
S, and
Left-Justified
User-Programmable Mode Controls:
Digital Attenuation: 0 dB to –63 dB, 0.5
dB/Step
Digital De-Emphasis
Digital Filter Rolloff: Sharp or Slow
Soft Mute
Zero Flags for Each Output
Dual-Supply Operation: 5-V Analog, 3.3-V
Digital
5-V Tolerant Digital Inputs
Small SSOP-16 Package
APPLICATIONS
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AV Receivers
DVD Movie Players
DVD Add-On Cards for High-End PCs
DVD Audio Players
HDTV Receivers
Car Audio Systems
Other Applications Requiring 24-Bit Audio
DESCRIPTION
The PCM1742 is a CMOS, monolithic, integrated
circuit which includes stereo digital-to-analog con-
verters (DACs) and support circuitry in a small
SSOP-16 package. The data converters use Texas
Instruments' enhanced multilevel delta-sigma archi-
tecture that employs fourth-order noise shaping and
8-level amplitude quantization to achieve excellent
dynamic performance and improved tolerance to
clock jitter. The PCM1742 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 200 kHz are supported. A full
set of user-programmable functions is accessible
through a 3-wire serial control port that supports
register write functions.
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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.
FilterPro is a trademark of Texas Instruments.
System Two, Audio Precision are trademarks of Audio Precision, Inc.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2000–2005, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
