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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fpcm1822″>View Datasheet

Texas Instruments PCM1822 Stereo Channel Audio ADC

Texas Instruments PCM1822 Stereo Channel Audio Analog-to-Digital Converter (ADC) is a high-performance audio ADC supporting simultaneous sampling of up to two analog channels. The device supports single-ended and differential line and microphone inputs with a 1VRMS full-scale signal. The device integrates a DC removal high-pass filter (HPF), a phase-locked loop (PLL) and supports sample rates up to 192kHz. The device supports I2S audio formats or time-division multiplexing (TDM), selectable with the hardware pin level.

The Texas Instruments PCM1822 supports master and slave mode selection for the audio bus interface operation. Since these devices can be powered from a 3.3V single supply, these integrated performance features make the device an excellent choice for cost-sensitive, space-constrained audio systems in far-field microphone recording applications. The PCM1822 is specified from –40°C to +125°C and is offered in a 20-pin WQFN package.

Features

  • Stereo high-performance ADC
    • 2-channel analog microphones or line-in
  • ADC line and microphone differential and single-ended input performance:
    • PCM1822 dynamic range
      • 117dB, dynamic range enhancer enabled
      • 111dB, dynamic range enhancer disabled
    • THD+N: –95dB
  • 1VRMS full-scale input
  • ADC sample rate (fS) = 8kHz to 192kHz
  • Hardware pin control configurations
  • Linear-phase or low-latency filter selection
  • Flexible audio serial data interface
    • Master or slave interface selection
    • 32-bits, 2-channel TDM
    • 32-bits, 2-channel I2S
  • Automatic power-down upon loss of audio clocks
  • Integrated high-performance audio PLL
  • 3.3V single-supply operation 
  • 3.3V or 1.8V I/O-supply operation 
  • Power consumption for 3.3V AVDD supply
    • 19.6mW/channel at 16kHz sample rate
    • 21.3mW/channel at 48kHz sample rate

Features

  • Smart speakers
  • DVD recorders and players
  • AV receivers
  • Video conference systems
  • IP network cameras

Functional Block Diagram

Block Diagram - Texas Instruments PCM1822 Stereo Channel Audio ADC

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Texas Instruments PCM1822 Stereo Channel Audio ADC