PCM1780DBQ

The PCM1780/81/82 is a CMOS, monolithic, integrated circuit, which includes stereo digital-to-analog converters and support circuitry in a small 16-lead SSOP package. The data converters use TI’s enhanced multilevel delta-sigma architecture to achieve excellent dynamic performance and improved tolerance to clock jitter. The PCM1780/81/82 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 PCM1780/82 provides a full set of user-programmable functions through a three-wire serial control port, which supports register write functions. The PCM1781 provides a subset of user-programmable functions through four control pins.

The PCM1780 is pin-compatible with the PCM1680 (8-channel DAC).

Key Features

• 24-Bit Resolution
• Analog Performance (V_CC = 5 V):
  • Dynamic Range: 106 dB
  • SNR: 106 dB, Typical
  • THD+N: 0.002%, Typical
  • Full-Scale Output: 3.9 Vp-p, Typical
• 4×/8× Oversampling Digital Filter:
  • Stop-Band Attenuation: -50 dB
  • Pass-Band Ripple: ±0.04 dB
• Sampling Frequency: 5 kHz to 200 kHz
• System Clock: 128 f_S, 192 f_S, 256 f_S, 384 f_S, 512 f_S, 768 f_S, 1152 f_S With Autodetect
• Software Control (PCM1780, PCM1782):
  • Accepts 16-, 18-, 20-, and 24-Bit Audio Data
  • Formats: Right-Justified, I²S, and Left-Justified
  • Digital Attenuation: Mode Selectable
    • 0 dB to -63 dB, 0.5 dB/step
    • 0 dB to -100 dB, 1 dB/step
  • Digital De-Emphasis
  • Digital Filter Rolloff: Sharp or Slow
  • Soft Mute
  • Zero Flags for Each Output
  • Open-Drain Output Zero Flag (PCM1782)
• Hardware Control (PCM1781):
  • I²S and 16-Bit Word, Right-Justified
  • Digital De-Emphasis
  • Soft Mute
  • Zero Flag for L-, R-Channel Common Output
• Power Supply: 5-V Single Supply
• Small, 16-Lead SSOP Package (150 mil)
• Pin-Compatible with PCM1680
• APPLICATIONS
  • A/V Receivers
  • DVD Movie Players
  • DVD Add-On Cards For High-End PCs
  • DVD Audio Players
  • HDTV Receivers
  • Car Audio Systems
  • Other Applications Requiring 24-Bit Audio

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