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

Abstract

With the rapid development of in-vehicle infotainment systems, the demand for high-performance audio codecs in automotive applications is increasing significantly. TI's TAC5X1X-Q1 audio codec delivers high audio quality, reliability and rich features for modern vehicle audio needs. This application report focuses on the headset-related applications using the TAC5X1X-Q1 series, covering key aspects such as schematic design (including analog input/output hardware design, AC-/DC-coupling considerations) and headset detection implementation. It details the hardware and software methods for headset insertion detection, addresses critical issues like debounce processing and real-time performance optimization, and briefly introduces other advanced features of the TAC5X1X-Q1 family. The content provided example configurations for engineers involved in the design and development of automotive audio systems using the TAC5X1X-Q1 series codecs.

Note: There is no automotive TAC5212-Q1. Any references to TAC5212 in this app note refer only to the industrial version of TAC5212.

The schematic design parts described in this application note are applicable to the codec families:

  • TAC5112-Q1, TAC5111-Q1, TAC5212
  • TAC5412-Q1, TAC5312-Q1, TAC5411-Q1, TAC5311-Q1