The PCM1748 is a CMOS, monolithic, integrated circuit which includes stereo digital-to-analog converters (DAC) and support circuitry in a small SSOP-16 package. The data converters use Texas Instruments' enhanced multilevel delta-sigma architecture that employs fourth-order noise shaping and 8-level amplitude quantization to achieve excellent dynamic performance and improved tolerance to clock jitter. The PCM1748 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 100 kHz are supported. A full set of user-programmable functions is accessible through a 3-wire serial-control port that supports register write functions.

• 24-Bit Resolution
• Analog Performance (VCC = 5 V):
  • Dynamic Range:
    • 106 dB, Typical (PCM1748KE)
    • 100 dB, Typical (PCM1748E)
  • SNR:
    • 106 dB, Typical (PCM1748KE)
    • 100 dB, Typical (PCM1748E)
  • THD+N:
    • 0.002%, Typical (PCM1748KE)
    • 0.003%, Typical (PCM1748E)
  • Full-Scale Output: 3.1 Vp-p, Typical
• 8× Oversampling Digital Filter:
  • Stop-Band Attenuation: -55 dB
  • Pass-Band Ripple: ±0.03 dB
• Sampling Frequency: 5 kHz to 100 kHz
• System Clock: 256 fS, 384 fS, 512 fS, 768 fS With Autodetect
• Accepts 16-, 18-, 20-, and 24-Bit Audio Data
• Data Formats: Standard, I2S, and Left-Justified
• User-Programmable Mode Controls:
  • Digital Attenuation: 0 dB to -63 dB, 0.5 dB/Step
  • Digital De-Emphasis
  • Digital Filter Rolloff: Sharp or Slow
  • Soft Mute
  • Zero Flags for Each Output
• Dual-Supply Operation:
  • 5-V Analog
  • 3.3-V Digital
• 5-V Tolerant Digital Inputs
• Small SSOP-16 Package
• APPLICATIONS
  • AV Receivers
  • DVD Movie Players
  • DVD Add-On Cards for High-End PCs
  • HDTV Receivers
  • Car Audio Systems
  • Other Applications Requiring 24-Bit Audio

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