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Texas Instruments TAA5412-Q1 Stereo Audio ADC

Texas Instruments TAA5412-Q1 Stereo Audio Analog-to-Digital Converter (ADC) is a 2-channel high-performance audio ADC that supports analog input signals up to 10VRMS with a dynamic range of 112dB. The TAA5412-Q1 allows for single-ended and differential input configurations and supports line and microphone inputs with AC and DC coupling options. This device offers programmable microphone bias, an integrated high-voltage, and input diagnostic circuitry directly connecting microphone-based automotive systems with full fault diagnostic capability for direct-coupled inputs. The TAA5412-Q1 uses an external, low-voltage, 3.3V supply to integrate an efficient boost converter to generate a high-voltage microphone bias. The device can create this microphone bias by using an external high-voltage supply (HVDD), which is any readily available supply in the system.

The Texas Instruments TAA5412-Q1 integrates the programable channel gain, a low-jitter phase-locked loop (PLL), digital volume control, a programmable high-pass filter (HPF), bi-quad filters, and decimation filters with low and ultra-low latency filter modes. It allows for sample rates up to 768kHz. The TAA5412-Q1 supports I2S, time-division multiplexing (TDM), or left-justified (LJ) audio formats. It can be controlled with the I2C or SPI interface. These integrated high-performance features and a single 3.3V supply operation make the TAA5412-Q1 device an excellent choice for scalable, space-constrained automotive systems.

Features

  • AEC-Q100 qualified for automotive applications with a temperature grade 1 of –40°C ≤ TA ≤ +125°C
  • ADC performance
    • Line/microphone differential input dynamic range: 112dB
    • Differential input THD+N: –99dB
    • Channel summing mode supports high SNR: 114dB
  • ADC input voltage
    • Differential, 10VRMS full-scale inputs
    • Single-ended, 5VRMS full-scale inputs
  • ADC sample rate (fS) = 4kHz to 768kHz
  • Programmable microphone bias (3V to 10V)
    • With an integrated, efficient boost converter
    • With external high voltage HVDD supply
  • Programmable microphone input fault diagnostics
    • Open inputs or shorted inputs
    • Short to ground, MICBIAS, or VBAT
    • MICBIAS over current protection
  • Up to four record channels
    • Two-channel analog + two-channel digital
    • One-channel analog + three-channel digital
    • Four-channel digital
  • Low-latency and ultra-low-latency decimation filter options
  • Programmable HPF and bi-quad digital filters
  • Automatic gain controller (AGC)
  • Programmable channel settings
    • -80dB to 47dB digital volume control
    • Gain calibration with 0.1dB resolution
    • Phase calibration with 325.5ns resolution
  • Gain and phase calibration for ADC channels
  • I2C or SPI controls
  • Audio serial data interface
    • Format: TDM, I2S, or left-justified (LJ)
    • Word length: 16, 20, 24, or 32 bits
    • Bus controller and target modes
  • Programmable PLL for flexible clocking
  • Low power modes of <18.5mW for 2-ch recording
  • Single-supply operation AVDD of 3.3V
  • I/O supply operation of 3.3V, 1.8V or 1.2V

Applications

  • Appliances including high energy efficient products
  • Electricity meter and grid
  • Power supplies
  • Factory automation
  • Building automation
  • Lighting
  • Motor drives

Simplified Block Diagram

Block Diagram - Texas Instruments TAA5412-Q1 Stereo Audio ADC

Additional Resources

Published: 2025-04-10 | Updated: 2025-05-06