TIDUFC9 May   2025

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 Codec Design
      2. 2.2.2 Class-D Amplifier
        1. 2.2.2.1 Audio Filter Design
      3. 2.2.3 Power Design
      4. 2.2.4 EMC, EMI Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 TAC5312-Q1
      2. 2.3.2 TAS5441-Q1
      3. 2.3.3 LMR43620-Q1
      4. 2.3.4 TPS7A52-Q1
      5. 2.3.5 TPD2E007
  9. 3Hardware, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
      1. 3.1.1 Board Connection
      2. 3.1.2 Configuring the Board
    2. 3.2 Software Requirements
      1. 3.2.1 Firmware for Bench Tests
    3. 3.3 Test Setup
    4. 3.4 Test Results
      1. 3.4.1 Audio Performance
      2. 3.4.2 Power Tests
      3. 3.4.3 EMI, EMC Test Results
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 Bill of Materials
      3. 4.1.3 PCB Layout Recommendations
        1. 4.1.3.1 Layout Prints
      4. 4.1.4 Altium Project
      5. 4.1.5 Gerber Files
      6. 4.1.6 Assembly Drawings
    2. 4.2 Documentation Support
    3. 4.3 Support Resources
    4. 4.4 Trademarks
  11. 5About the Author

Audio Performance

THD+N (Total Harmonic Distortion + Noise) is a measurement of how exceptional a sine wave is. The 1kHz sine wave is generated by the audio precision instrument and sent over I2S to the TAC5312-Q1. The audio precision then measures the THD+N of the analog signal across the 4Ω load. Figure 3-3 shows the THD+N versus output power across the load.

TIDA-060048 THD+N versus Output Power,
                        4Ω Load, PVDD = 14.4V, 1kHz Sine WaveFigure 3-3 THD+N versus Output Power, 4Ω Load, PVDD = 14.4V, 1kHz Sine Wave

THD+N also varies with frequency. Figure 3-4 shows the THD+N across frequency for three different power levels.

TIDA-060048 THD+N versus Frequency, 4Ω
                        Load, PVDD = 14.4VFigure 3-4 THD+N versus Frequency, 4Ω Load, PVDD = 14.4V
SWEEPTRACECOLORDATAAXISCOMMENT
11BlackAnIr.THD+N RatioLeft5W
21RedAnIr.THD+N RatioLeft10W
31BlueAnIr.THD+N RatioLeft15W