PCM1795 Datasheet, PDF (1/58 Pages) Texas Instruments – 32-Bit, 192-kHz Sampling, Advanced Segment, Stereo Audio Digital-to-Analog Converter

PCM1795
www.ti.com ........................................................................................................................................................................................................ SLES248 – MAY 2009
32-Bit, 192-kHz Sampling, Advanced Segment,
Stereo Audio Digital-to-Analog Converter
FEATURES
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•234567 32-Bit Resolution
• Analog Performance:
– Dynamic Range: 123 dB
– THD+N: 0.0005%
• Differential Current Output: 3.9 mA_PP
• 8× Oversampling Digital Filter:
– Stop Band Attenuation: –98 dB
– Passband Ripple: ±0.0002 dB
• Sampling Frequency: 10 kHz to 200 kHz
• System Clock: 128, 192, 256, 384, 512, or
768 f_S With Autodetect
• Accepts 16-, 24-, and 32-Bit Audio Data
• PCM Data Formats: Standard, I²S™, and
Left-Justified
• DSD Format Interface Available
• Interface Available for Optional External Digital
Filter or DSP
• TDMCA or Serial Port (SPI™/I²C™)
• User-Programmable Mode Controls:
– Digital Attenuation: 0 dB to –120 dB,
0.5-dB/Step
– Digital De-Emphasis
– Digital Filter Roll-Off: Sharp or Slow
– Soft Mute
– Zero Flag for Each Output
• Compatible With PCM1792A and PCM1796
(Pins and Mode Controls)
• Dual Supply Operation:
– 5-V Analog, 3.3-V Digital
• 5-V Tolerant Digital Inputs
• Small SSOP-28 Package
APPLICATIONS
• A/V Receivers
• SACD Players
• DVD Players
• HDTV Receivers
• Car Audio Systems
• Digital Multitrack Recorders
• Other Applications Requiring 32-Bit Audio
DESCRIPTION
The PCM1795 is a monolithic CMOS integrated
circuit that includes stereo digital-to-analog
converters (DACs) and support circuitry in a small
SSOP-28 package. The data converters use TI’s
advanced segment DAC architecture to achieve
excellent dynamic performance and improved
tolerance to clock jitter. The PCM1795 provides
balanced current outputs, allowing the user to
optimize analog performance externally. The
PCM1795 accepts pulse code modulation (PCM) and
direct stream digital (DSD) audio data formats,
providing an easy interface to audio digital signal
processors (DSPs) and decoder chips. The PCM1795
also interfaces with external digital filter devices such
as the DF1704, DF1706, and the PMD200 from
Pacific Microsonics™. Sampling rates up to 200 kHz
are supported. A full set of user-programmable
functions is accessible through an SPI or I²C serial
control port that supports register write and readback
functions. The PCM1795 also supports the
time-division-multiplexed (TDM) command and audio
(TDMCA) data format.
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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.
System Two, Audio Precision are trademarks of Audio Precision, Inc.
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SPI is a trademark of Motorola.
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I2S, I2C are trademarks of NXP Semiconductors.
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Pacific Microsonics is a trademark of Pacific Microsonics, Inc.
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Super Audio CD is a trademark of Sony Corporation.
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All other trademarks are the property of their respective owners.
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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 © 2009, Texas Instruments Incorporated