SDAA293 February   2026 TAC5111-Q1 , TAC5112-Q1 , TAC5311-Q1 , TAC5312-Q1 , TAC5412-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Detailed Description
    1. 2.1 Analog Input Hardware Design
      1. 2.1.1 Selection of External Bias Resistor
      2. 2.1.2 Selection of Coupling Capacitor
    2. 2.2 Analog Output Hardware Design
      1. 2.2.1 Selection of Output Coupling Capacitor
      2. 2.2.2 Output Capacitor Summary
      3. 2.2.3 How to Select ESD for Audio Ports
    3. 2.3 AC-Coupled and DC-Coupled
      1. 2.3.1 AC-Coupled Systems
      2. 2.3.2 DC-Coupled Systems
    4. 2.4 TAC5212 and TAC5112-Q1 Headset Detection Design
      1. 2.4.1 How to Implement Headset Detection
        1. 2.4.1.1 Headset Detection in AC-Coupled Output Mode
        2. 2.4.1.2 Headset Detection in DC-Coupled Output Mode
      2. 2.4.2 Debounce and Detection Real-Time Performance of Headset Detection
      3. 2.4.3 TAC5X1X-Q1 Family Other Advanced Features
  6. 3Summary
    1. 3.1 Configuration Example
  7. 4References

3 Summary

This application note focuses on the core design content of the TAC5X1X-Q1 in automotive headset scenarios, aiming to provide clear design guidelines for hardware engineers. This document first elaborates on the hardware schematic design specifications of the analog input and output terminals of the chip, including the selection of key circuit parameters and the application scenarios of AC-/DC-Coupled methods. Then, the document focuses on explaining the implementation logic of the headset insertion detection function, the design of the debounce mechanism, and the key points of real-time performance optimization to ensure the reliable identification and rapid response of headset plug-in and plug-out operations. At the same time, this application note briefly introduces other advanced features of this series of chips to help engineers fully tap the chip potential.