132dB SNR Highest Performance Stereo DAC (H/W Control) - PCM1794A

PCM1794A (ACTIVE)

132dB SNR Highest Performance Stereo DAC (H/W Control)

 

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Description

The PCM1794A device is a monolithic, CMOS-integrated circuit that includes stereo digital-to-analog converters (DACs) and support circuitry in a small 28-pin SSOP package. The data converters use TI’s advanced segment DAC architecture to achieve excellent dynamic performance and improved tolerance to clock jitter. The PCM1794A device provides balanced current outputs, allowing the user to optimize analog performance externally. Sampling rates up to 200 kHz are supported.

Features

  • 24-Bit Resolution
  • Analog Performance:
    • Dynamic Range:
      • 132 dB (9 V RMS, Mono)
      • 129 dB (4.5 V RMS, Stereo)
      • 127 dB (2 V RMS, Stereo)
    • THD+N: 0.0004%
  • Differential Current Output: 7.8 mA p-p
  • 8× Oversampling Digital Filter:
    • Stop-Band Attenuation: –130 dB
    • Pass-Band Ripple: ±0.00001 dB
  • Sampling Frequency: 10 kHz to 200 kHz
  • System Clock: 128, 192, 256, 384, 512, or 768 fS
    With Autodetect
  • Accepts 16-Bit and 24-Bit Audio Data
  • PCM Data Formats: Standard, I2S, and
    Left-Justified
  • Optional Interface Available to External Digital
    Filter or DSP
  • Digital De-Emphasis
  • Digital Filter Rolloff: Sharp or Slow
  • Soft Mute
  • Zero Flag
  • Dual-Supply Operation: 5-V Analog, 3.3-V Digital
  • 5-V Tolerant Digital Inputs
  • Small 28-Pin SSOP Package

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Parametrics Compare all products in Audio DAC

 
DAC Channels
Analog Inputs
Analog Outputs
DAC SNR (Typ) (dB)
Sampling Rate (Max) (kHz)
Control Interface
Resolution (Bits)
Architecture
Package Size: mm2:W x L (PKG)
Approx. Price (US$)
PCM1794A PCM1792A PCM1795 PCM1798
2    2    2    2   
0    0    0    0   
2    2    2    2   
127    127    123    123   
192    192    200    192   
H/W    SPI
I2C   
SPI
I2C
TDMCA   
H/W   
24    24    32    24   
Advanced Segment    Advanced Segment    Advanced Segment    Advanced Segment   
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)   
7.08 | 1ku    7.64 | 1ku    2.90 | 1ku    2.78 | 1ku   

Other qualified versions of PCM1794A

Version Part Number Definition
Automotive PCM1794A-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

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