PCM2912A - Audio CODEC with USB Interface, Mono Microphone Input and Stereo Headphone Output

The PCM2912A is the Texas Instruments single-chip, USB stereo audio codec with a USB, 2.0-compliant, full-speed protocol controller and an analog front-end (AFE) function for headset applications.

The USB protocol controller works with no software code, but USB descriptors can be modified on request. The PCM2912A employs SpAct™ architecture, TI’s unique system that recovers the audio clock from USB packet data. On-chip analog PLLs with SpAct enables independent playback and record sampling rates with low clock jitters.

• On-Chip USB Interface:
  • With Full-Speed Transceivers
  • Fully Compliant With USB 2.0 Specification
  • Certified By USB-IF
  • Partially Programmable Descriptors
  • Adaptive Isochronous Transfer for Playback
  • Asynchronous-Isochronous Transfer for
    Record
  • Bus Powered
• 16-Bit Delta-Sigma ADC and DAC
• Sampling Rate:
  • 8, 11.025, 16, 22.05, 32, 44.1, or 48 kHz
• On-Chip Clock Generator:
  • With Single 6-MHz Clock Source
• Mono ADC with Microphone Input
  • Analog Performance at V_BUS = 5 V:
    • THD+N: 0.01%
    • SNR: 92 dB
    • Dynamic Range: 90 dB
  • Decimation Digital Filter
    • Passband Ripple: ±0.05 dB
    • Stop-Band Attenuation: –65 dB
  • Single-Ended Voltage Input
  • Antialiasing Filter Included
  • Digital HPF Included
  • Microphone Bias, Microphone Amplifier, and
    Input PGA
• Stereo DAC With Headphone Output
  • Analog Performance at V_BUS = 5.0 V:
    • THD+N: 0.01% (R_L > 10 kΩ)
    • THD+N: 0.02% (R_L = 32 Ω)
    • SNR: 92 dB
    • Dynamic Range: 90 dB
    • PO: 13 mW (R_L = 32 Ω)
    • PO: 25 mW (R_L = 16 Ω)
  • Oversampling Digital Filter
    • Passband Ripple: ±0.1 dB
    • Stop-Band Attenuation: –43 dB
    • Single-Ended Voltage Output
    • Analog LPF Included
    • Sidetone PGA, Output PGA, and HP
      Amplifier
• Multifunctions:
  • Suspend, Playback, and Record Status Flag
  • Microphone Amplifier, Mute, and Gain Control
• Pop/Click Noise-Free
• Single Power-Supply: 5 V Typical (V_BUS)
• Package: 32-Pin TQFP