Texas Instruments TAA3020 Audio ADC

Texas Instruments TAA3020 Audio Analog-to-Digital Converter (ADC) is a high-performance ADC that supports simultaneous sampling of up to two analog channels or four digital channels. This audio ADC supports line and microphone inputs and allows single-ended and differential input configurations. The TAA3020 ADC provides sample rates up to 768kHz frequency and features and the ability to operate at a single supply voltage of 1.8V or 3.3V. This ADC integrates programmable channel gain, digital volume control, programmable microphone bias voltage, Phase-Locked Loop (PLL), programmable High-Pass Filter (HPF), biquad filters, and low-latency filter modes. These features make the device excellent for space-constrained audio systems in far-field microphone recording applications. The TAA3020 ADC is ideal for smart speakers, IP network cameras, professional microphones and wireless systems, and video conference systems.

The TAA3020 device supports Time-Division Multiplexing (TDM), I2S, or Left-Justified (LJ) audio formats, and can be controlled with the I2C interface. This audio ADC operates at -40°C to 105°C and is offered in a 20-pin WQFN package.

Features

  • Multichannel high-performance ADC:
    • 2-channel analog microphones or line-in
    • 4-channel digital PDM microphones
    • Up to 2 analog and up to 2 digital microphone channels
  • ADC line and microphone differential input performance:
    • 104dB Dynamic range (DR)
    • -95dB THD+N
  • ADC channel summing mode, DR performance:
    • 107dB, 2-channel summing
  • ADC input voltage:
    • Differential, 2VRMS full-scale inputs
    • Single-ended, 1VRMS full-scale inputs
  • ADC sample rate (fS) = 8kHz to 768kHz frequency range
  • Programmable channel settings:
    • 0dB to 42dB, 0.5dB steps channel gain
    • -100dB to 27dB digital volume control
    • Gain calibration with 0.1dB resolution
    • Phase calibration with 163ns resolution
  • Programmable microphone bias or supply voltage generation
  • Low-latency signal processing filter selection
  • Programmable HPF and biquad digital filters
  • Automatic Gain Controller (AGC)
  • Voice Activity Detection (VAD)
  • I2C control interface
  • Integrated high-performance audio PLL
  • Automatic clock divider setting configurations
  • Audio serial data interface:
    • TDM, I2S, or Left-Justified (LJ) format
    • 16 bits, 20 bits, 24 bits, or 32 bits word length
    • Master or slave interface
  • 3.3V or 1.8V single-supply operating voltage
  • 3.3V or 1.8V I/O-supply operation
  • Power consumption for 1.8V AVDD supply:
    • 9.5mW/channel at 48kHz sample rate

Applications

  • Smart speakers
  • IP network cameras
  • Professional microphones and wireless systems
  • Video conference systems

Block Diagram

Block Diagram - Texas Instruments TAA3020 Audio ADC
Publicado: 2025-01-17 | Actualizado: 2025-02-23