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Texas Instruments PCM1840 Audio Analog-to-Digital Converter (ADC)

Texas Instruments PCM1840 Audio Analog-to-Digital Converter (ADC) supports simultaneous sampling of up to four analog channels. The device supports differential line and microphone inputs with a 2VRMS full-scale signal. The device integrates microphone bias voltage, a phase-locked loop (PLL), a DC removal high-pass filter (HPF), and supports sample rates up to 192kHz. The device supports time-division multiplexing (TDM), I2S, or left-justified (LJ) audio formats, selectable with the hardware pin level. Additionally, the PCM1840 supports master and slave mode selection for the audio-bus interface operation. These integrated high-performance features and the ability to be powered from a single supply of 3.3V make the device an excellent choice for cost-sensitive, space-constrained audio systems in far-field microphone recording applications. The Texas Instruments PCM1840 is specified from –40°C to +125°C and is offered in a 24-pin WQFN package.

Features

  • Multichannel high-performance ADC
    • 4-channel analog microphones or line-in
  • ADC line and microphone differential input performance
    • Dynamic range
      • 123dB, dynamic range enhancer enabled
      • 113dB, dynamic range enhancer disabled
    • –98dB THD+N
  • Flexible audio serial data interface
    • Master or slave interface selection
    • 32-bits, 4-channel TDM
    • 32-bits, 2-channel TDM
    • 32-bits, 2-channel I2S
    • 32-bits, 2-channel left-justified (LJ)
  • ADC differential 2VRMS full-scale input
  • ADC sample rate (fS) = 8kHz to 192kHz
  • Hardware pin control configurations
  • Linear-phase or low-latency filter selection
  • Automatic power-down upon loss of audio clocks
  • Integrated high-performance audio PLL
  • Low-noise MICBIAS 2.75V output
  • 3.3V single-supply operation
  • 3.3V or 1.8V I/O-supply operation
  • Power consumption for 3.3V AVDD supply
    • 17.0mW/channel at 16kHz sample rate
    • 18.4mW/channel at 48kHz sample rate

Applications

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

Functional Block Diagram

Block Diagram - Texas Instruments PCM1840 Audio Analog-to-Digital Converter (ADC)

Related Development Tool

PCM1840EVM ADC Evaluation Module (EVM)

Texas Instruments PCM1840EVM ADC Evaluation Module (EVM)

Demonstrates the performance and functionality of the PCM1840, a high-performance audio ADC.

Learn Moreabout Texas Instruments PCM1840EVM ADC Evaluation Module (EVM) View Productsrelated to Texas Instruments PCM1840EVM ADC Evaluation Module (EVM)
Published: 2020-08-14 | Updated: 2024-08-09