PCM1681 - 105dB SNR 8-Channel Audio DAC with TDM Mode

The PCM1681 and PCM1681-Q1 are CMOS monolithic integrated circuits which feature an eight-channel 24-bit audio digital-to-analog converter (DAC) and support circuitry in small 28-lead TSSOP PowerPAD packages. The DACs utilize Burr-Brown's enhanced multilevel delta-sigma (ΔΣ) architecture to achieve excellent signal-to-noise performance and a high tolerance to clock jitter.

The PCM1681 and PCM1681-Q1 accept TDM (time-division multiplexed) format in addition to industry-standard audio data formats with 16- to 24-bit audio data width. Sampling rates up to 200 kHz are supported. The PCM1681 and PCM1681-Q1 provide a sub-set of user-programmable functions through a parallel control port, in addition to a full set of user-programmable functions through a serial control port, SPI, or I²C. The PCM1681 supports –40°C to +85°C for consumer grade applications and the PCM1681-Q1 supports –40°C to +105°C for automotive audio grade systems.

• Qualified for Automotive Applications: PCM1681-
  Q1
• 24-Bit Resolution
• Analog Performance:
  • Dynamic Range: 105 dB Typical
  • SNR: 105 dB Typical
  • THD+N: 0.002% Typical
  • Full-Scale Output: 3.75 V_PP Typical
• 4×/8× Oversampling Interpolation Filter:
  • Stop-Band Attenuation: –57 dB
  • Pass-Band Ripple: ±0.015 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, or 1152 f_S with Autodetect
• Zero Flags for Selectable Channel Combinations
• Flexible Mode Control:
  • SPI™/I²C™ Dual Mode for Serial Port
  • Parallel Hardware Control with 4 Functions
• User-Programmable Functions (in SPI/I²C):
  • Flexible Audio Data Formats:
    • Right-Justified, I²S™, Left-Justified, TDM,
      DSP
    • 16- and 24-Bit Audio Data
  • Digital Attenuation: Mode Selectable
    • 0 dB to –63 dB, 0.5 dB/step
    • 0 dB to –100 dB, 1 dB/step
  • Soft Mute
  • Digital De-Emphasis
  • Digital Filter Roll-Off: Sharp or Slow
  • Oversampling Mode
• User-Programmable Functions (in H/W):
  • Flexible Audio Data Formats:
    • Right-Justified, I²S, Left-Justified, TDM
    • Soft Mute
    • Digital De-Emphasis
    • Oversampling Mode
• Power Supply Voltage: 5-V Analog, 3.3-V Digital
• Package: 28-Lead HTSSOP PowerPAD
• Operation Temperature Range:
  • –40°C to 85°C for Consumer Grade
  • –40°C to 105°C for Automotive Audio Grade