PCM1738 (NRND)

117dB SNR Stereo DAC

117dB SNR Stereo DAC - PCM1738

Not Recommended for New Designs (NRND)

Replaced By PCM1796– The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent.

TI does not recommend using this part in a new design. This product continues to be in production to support existing customers.


The PCM1738 is a CMOS, monolithic, integrated circuit (IC) that includes stereo digital-to-analog converters (DACs) and support circuitry in a small SSOP-28 package. The data converters use a newly developed advanced segment DAC architecture to achieve excellent dynamic performance and improved tolerance to clock jitter. The PCM1738 provides balanced current outputs, allowing the user to optimize analog performance externally, and accepts industry-standard audio data formats with 16- to 24-bit data, providing easy interfacing to audio DSP and decoder chips. Sampling rates up to 200 kHz are supported. The PCM1738 also has two optional modes of operation: an external digital filter mode (for use with the DF1704, DF1706, and PMD200), and a DSD decoder interface for SACD playback applications. A full set of user-programmable functions is accessible through a 4-wire serial control port that supports register write and read functions.


  • 24-Bit Resolution
  • Analog Performance (VCC = 5 V):
    • Dynamic Range: 117 dB (typical)
    • SNR: 117 dB (typical)
    • THD+N: 0.0004% (typical)
    • Full-Scale Output: 2.2 Vrms (at Postamplifier)
  • Differential Current Output: ±2.48 mA
  • 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
  • Data Formats: Standard, I2S, and Left-Justified
  • 8× Oversampling Digital Filter:
    • Stop-Band Attenuation: -82 dB
    • Pass-Band Ripple: ±0.002 dB
  • Optional Interface to External Digital Filter Available
  • Optional Interface to DSD Decoder for SACD Playback
  • 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
    • Zero-Detect Mute
    • Zero Flags for Each Output
  • Dual-Supply Operation:
    • 5-V Analog, 3.3-V Digital
  • 5-V Tolerant Digital Inputs
  • Small SSOP-28 Package
    • AV Receivers
    • DVD Movie Players
    • SACD Players
    • HDTV Receivers
    • Car Audio Systems
    • Digital Multitrack Recorders
    • Other Multichannel Audio Systems

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