Burr Brown Products
from Texas Instruments
PCM1791A
SLES071A − MARCH 2003 − REVISED JANUARY 2004
24 BIT, 192 kHz SAMPLING, ADVANCED SEGMENT,
AUDIO STEREO DIGITAL TO ANALOG CONVERTER
FEATURES
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24-Bit Resolution
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Analog Performance:
− Dynamic Range: 113 dB
− THD+N: 0.001%
− Full-Scale Output: 2.1 V RMS (at Postamp)
Differential Voltage Output: 3.2 Vp-p
8× Oversampling Digital Filter:
− Stop-Band Attenuation: –82 dB
− Pass-Band Ripple:
±0.002
dB
Sampling Frequency: 10 kHz to 200 kHz
System Clock: 128, 192, 256, 384, 512, or
768 f
S
With Autodetect
Accepts 16-, 20-, and 24-Bit Audio Data
PCM Data Formats: Standard, I
2
S, and
Left-Justified
DSD Format Interface Available
Optional Interface to External Digital Filter or
DSP Available
TDMCA or Serial Port (SPI/I
2
C)
User-Programmable Mode Controls:
− Digital Attenuation: 0 dB to –120 dB,
0.5 dB/Step
− Digital De-Emphasis
− Digital Filter Rolloff: Sharp or Slow
− Soft Mute
− Zero Flag for Each Output/PCM and DSD
Formats
Dual Supply Operation:
− 5-V Analog, 3.3-V Digital
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5-V Tolerant Digital Inputs
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Small 28-Lead SSOP Package, Lead-Free
Product
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APPLICATIONS
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A/V Receivers
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SACD Players
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DVD Players
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HDTV Receivers
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Car Audio Systems
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Digital Multitrack Recorders
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Other Applications Requiring 24-Bit Audio
DESCRIPTION
The PCM1791A is a monolithic CMOS integrated circuit
that includes stereo digital-to-analog converters and
support circuitry in a small 28-lead SSOP package. The
data converters use TI’s advanced segment DAC
architecture to achieve excellent dynamic performance
and improved tolerance to clock jitter. The PCM1791A
provides balanced voltage outputs, allowing the user to
optimize analog performance externally. The PCM1791A
accepts PCM and DSD audio data formats, providing easy
interfacing to audio DSP and decoder chips. The
PCM1791A also accepts interface to external digital filter
devices (DF1704, DF1706, PMD200). Sampling rates up
to 200 kHz are supported. A full set of user-programmable
functions is accessible through an SPI or I
2
C serial control
port, which supports register write and readback functions.
The PCM1791A also supports the time-division-
multiplexed command and audio (TDMCA) data format.
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This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate
precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to
damage because very small parametric changes could cause the device not to meet its published specifications.
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.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright
2004, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
