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PCM1794A

ACTIVE

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

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Data sheet

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NEW TAD5242 ACTIVE Hardware-control stereo audio DAC with 120dB dynamic range, and headphone and line driver Higher performance with voltage output

PCM1794A

ACTIVE
Data sheet Order now

Product details

Number of DAC channels 2 Analog inputs 0 Analog outputs 2 DAC SNR (typ) (dB) 127 Sampling rate (max) (kHz) 192 Control interface H/W Resolution (bps) 24 Architecture Advanced Segment Operating temperature range (°C) -25 to 85 Rating Catalog
Number of DAC channels 2 Analog inputs 0 Analog outputs 2 DAC SNR (typ) (dB) 127 Sampling rate (max) (kHz) 192 Control interface H/W Resolution (bps) 24 Architecture Advanced Segment Operating temperature range (°C) -25 to 85 Rating Catalog
SSOP (DB) 28 79.56 mm² 10.2 x 7.8
  • 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

All trademarks are the property of their respective owners.
  • 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

All trademarks are the property of their respective owners.

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.

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.
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Technical documentation

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Type Title Date
* Data sheet PCM1794A 24-Bit, 192-kHz Sampling, Advanced Segment, Audio Stereo Digital-to-Analog Converter datasheet (Rev. B) PDF | HTML 07 Dec 2015
Circuit design Current-to-voltage converter circuit for audio DACs (Rev. A) PDF | HTML 19 Sep 2024
Application note HiFi Audio Circuit Design 23 Aug 2017
EVM User's guide DEM-PCM1792, DEM-DSD1792, DEM-PCM1794, DEM-DSD1794 EVM User's Guide 06 Aug 2003
Application note A Low Noise, Low Distortion Design for Antialiasing and Anti-Imaging Filters 27 Sep 2000
Application note THD+N Versus Frequency Characteristics and Spectra of the PCM1717/18/19/20/23/27 27 Sep 2000

Design & development

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Simulation model

PCM1794A IBIS Model

SLEM011.ZIP (11 KB) - IBIS Model
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SBAM413.ZIP (44 KB) - TINA-TI Reference Design
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SSOP (DB) 28 Ultra Librarian
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