PCM1795_15 Datasheet, PDF (1/63 Pages) Texas Instruments – PCM1795 32-Bit, 192-kHz Sampling, Advanced Segment,Stereo Audio Digital-to-Analog Converter

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PCM1795
SLES248A – MAY 2009 – REVISED MARCH 2015
PCM1795 32-Bit, 192-kHz Sampling, Advanced Segment,
Stereo Audio Digital-to-Analog Converter
1 Features
•1 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
2 Applications
• A/V Receivers
• SACD Players
• DVD Players
• HDTV Receivers
• Car Audio Systems
• Digital Multitrack Recorders
• Other Applications Requiring 32-Bit Audio
3 Description
The PCM1795 device 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, letting the user optimize
analog performance externally. The PCM1795
accepts pulse code modulation (PCM) and direct
stream digital (DSD) audio data formats, thus
providing an easy interface to audio digital signal
processors (DSPs) and decoder chips. The PCM1795
device 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 device also
supports the time-division-multiplexed (TDM)
command and audio (TDMCA) data format.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
PCM1795
SSOP (28)
10.20 mm × 5.30 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Block Diagram
LRCK
BCK
DATA
RST
MDO
MDI
MC
MS
MSEL
ZEROL
ZEROR
Audio
Data Input
I/F
Function
Control I/F
Zero
Detect
x8
Oversampling
Digital Filter
and
Function Control
System
Clock
Manager
Advanced
Segment
DAC
Modulator
IOUTL-
Current
Segment
DAC
IOUTL+
Bias
and VREF
VCOML
IREF
VCOMR
IOUTR-
Current
Segment
DAC
IOUTR+
Power Supply
VOUTL
I/V and Filter
VOUTR
I/V and Filter
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.