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PCM1791A

ACTIVE

113dB SNR Stereo DAC (S/W Control)

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Data sheet

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TAD5212 ACTIVE High-performance stereo audio DAC with 120dB dynamic range, and headphone and line driver 7-dB higher performance with integrated headphone amplifier, SW controlled, QFN package

PCM1791A

ACTIVE
Data sheet Order now

Product details

Number of DAC channels 2 Sampling rate (min) (kHz) 10 Sampling rate (max) (kHz) 192 THD+N (dB) -100 Control interface I2C, SPI Resolution (Bits) 24 DAC SNR (typ) (dB) 113 Analog outputs 2 Architecture Advanced Segment Operating temperature range (°C) -25 to 85 Rating Catalog
Number of DAC channels 2 Sampling rate (min) (kHz) 10 Sampling rate (max) (kHz) 192 THD+N (dB) -100 Control interface I2C, SPI Resolution (Bits) 24 DAC SNR (typ) (dB) 113 Analog outputs 2 Architecture Advanced Segment Operating temperature range (°C) -25 to 85 Rating Catalog
SSOP (DB) 28 79.56 mm² (10.2 mm × 7.8 mm)
  • 24-Bit Resolution
  • Analog Performance:
    • Dynamic Range: 113 dB
    • THD+N: 0.001%
    • Full-Scale Output: 2.1 V RMS (at Postamp)
  • Differential Voltage Output: 3.2 Vp-p
  • 8× Oversampling Digital Filter:
    • Stop-Band Attenuation: –82 dB
    • Pass-Band Ripple: ±0.002 dB
  • Sampling Frequency: 10 kHz to 200 kHz
  • System Clock: 128, 192, 256, 384, 512, or 768 fS With Autodetect
  • Accepts 16-, 20-, and 24-Bit Audio Data
  • PCM Data Formats: Standard, I2S, and Left-Justified
  • DSD Format Interface Available
  • Optional Interface to External Digital Filter or DSP Available
  • 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 Rolloff: Sharp or Slow
    • Soft Mute/PCM Format
    • Zero Detect Mute/PCM Format
    • Zero Flag for Each Output/PCM and DSD Formats
  • Dual Supply Operation:
    • 5-V Analog, 3.3-V Digital
  • 5-V Tolerant Digital Inputs
  • Small 28-Lead SSOP Package
  • APPLICATIONS
    • A/V Receivers
    • DVD Movie Players
    • SACD Player
    • HDTV Receivers
    • Car Audio Systems
    • Digital Multitrack Recorders
    • Other Applications Requiring 24-Bit Audio
  • 24-Bit Resolution
  • Analog Performance:
    • Dynamic Range: 113 dB
    • THD+N: 0.001%
    • Full-Scale Output: 2.1 V RMS (at Postamp)
  • Differential Voltage Output: 3.2 Vp-p
  • 8× Oversampling Digital Filter:
    • Stop-Band Attenuation: –82 dB
    • Pass-Band Ripple: ±0.002 dB
  • Sampling Frequency: 10 kHz to 200 kHz
  • System Clock: 128, 192, 256, 384, 512, or 768 fS With Autodetect
  • Accepts 16-, 20-, and 24-Bit Audio Data
  • PCM Data Formats: Standard, I2S, and Left-Justified
  • DSD Format Interface Available
  • Optional Interface to External Digital Filter or DSP Available
  • 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 Rolloff: Sharp or Slow
    • Soft Mute/PCM Format
    • Zero Detect Mute/PCM Format
    • Zero Flag for Each Output/PCM and DSD Formats
  • Dual Supply Operation:
    • 5-V Analog, 3.3-V Digital
  • 5-V Tolerant Digital Inputs
  • Small 28-Lead SSOP Package
  • APPLICATIONS
    • A/V Receivers
    • DVD Movie Players
    • SACD Player
    • HDTV Receivers
    • Car Audio Systems
    • Digital Multitrack Recorders
    • Other Applications Requiring 24-Bit Audio

The PCM1791A is a monolithic CMOS integrated circuit that includes stereo digital-to-analog converters and support circuitry in a small 28-lead SSOP package. The data converters use TI’s advanced segment DAC architecture to achieve excellent dynamic performance and improved tolerance to clock jitter. The PCM1791A provides balanced voltage outputs, allowing the user to optimize analog performance externally. The PCM1791A accepts PCM and DSD audio data formats, providing easy interfacing to audio DSP and decoder chips. The PCM1791A also accepts interface to external digital filter devices (DF1704, DF1706, PMD200). 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, which supports register write and readback functions. The PCM1791A also supports the time-division-multiplexed command and audio (TDMCA) data format.

The PCM1791A is a monolithic CMOS integrated circuit that includes stereo digital-to-analog converters and support circuitry in a small 28-lead SSOP package. The data converters use TI’s advanced segment DAC architecture to achieve excellent dynamic performance and improved tolerance to clock jitter. The PCM1791A provides balanced voltage outputs, allowing the user to optimize analog performance externally. The PCM1791A accepts PCM and DSD audio data formats, providing easy interfacing to audio DSP and decoder chips. The PCM1791A also accepts interface to external digital filter devices (DF1704, DF1706, PMD200). 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, which supports register write and readback functions. The PCM1791A also supports the time-division-multiplexed command and audio (TDMCA) data format.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet 24-Bit 192 kHz Sampling Advanced Segment Audio Stereo DAC datasheet (Rev. B) Nov 30, 2006
Application note A Low Noise, Low Distortion Design for Antialiasing and Anti-Imaging Filters Sep 27, 2000
Application note THD+N Versus Frequency Characteristics and Spectra of the PCM1717/18/19/20/23/27 Sep 27, 2000

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Driver or library

PCM179XSW-LINUX — Linux Driver for PCM179X

The Linux driver supports the PCM179x device family of audio digital-to-analog converters (DACs), communication through I2C and SPI, and registers with the ASOC framework of the Linux kernel.

Linux main line status

Available in Linux main line: Yes
Available through git.ti.com: N/A

Linux source files

(...)

Supported products & hardware
GUI for evaluation module (EVM)

SLAC246 — PCM1791EVM - Graphical User Interface (GUI) Software

Supported products & hardware
Simulation model

PCM1791 IBIS Model

SLEM010.ZIP (23 KB) - IBIS model
Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
SSOP (DB) 28 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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