32-bit, 192kHz Sampling, Advanced Segment, Audio Stereo DAC - PCM1795

PCM1795 (ACTIVE)

32-bit, 192kHz Sampling, Advanced Segment, Audio Stereo DAC

 

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&trade. 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.

Features

  • 32-Bit Resolution
  • Analog Performance:
    • Dynamic Range: 123 dB
    • THD+N: 0.0005%
  • Differential Current Output: 3.9 mAPP
  • 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 fS 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

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Parametrics Compare all products in Audio DAC

 
DACs (#)
# Inputs / # Outputs
DAC SNR (Typ) (dB)
Architecture
Resolution (Bits)
Control Interface
Digital Audio Interface
THD+N(Typ) (%)
Additional Features
Pin/Package
Power Consumption (Typ) (mW)
Rating
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
Approx. Price (US$)
PCM1795 PCM1792A PCM1794A PCM1796 PCM1798
2    2    2    2    2   
0 / 2    0 / 2    0 / 2    0 / 2    0 / 2   
123    127    127    123    123   
Advanced Segment    Advanced Segment    Advanced Segment    Advanced Segment    Advanced Segment   
32    24    24    24    24   
SPI
I2C
TDMCA   
SPI
I2C   
H/W    SPI
I2C   
H/W   
L
R
I2S
TDMCA
DSD   
L
R
I2S
TDMCA
DSD   
L
R
I2S   
L
R
I2S
TDMCA
DSD   
L
R
I2S   
0.0005    0.001    0.0005    0.0005     
32-Bit Digital Processing    TDMCA/DSD Support      TDMCA/DSD Support    DSD Support   
28SSOP    28SSOP    28SSOP    28SSOP    28SSOP   
  205    205    115    115   
Catalog    Catalog    Catalog    Catalog    Catalog   
-25 to 85    -25 to 85    -25 to 85    -25 to 85    -25 to 85   
SSOP    SSOP    SSOP    SSOP    SSOP   
28SSOP: 80 mm2: 7.8 x 10.2(SSOP)    28SSOP: 80 mm2: 7.8 x 10.2(SSOP)    28SSOP: 80 mm2: 7.8 x 10.2(SSOP)    28SSOP: 80 mm2: 7.8 x 10.2(SSOP)    28SSOP: 80 mm2: 7.8 x 10.2(SSOP)   
2.90 | 1ku    7.21 | 1ku    7.08 | 1ku    2.78 | 1ku    2.78 | 1ku   

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