SLAU903 October   2023

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Hardware Overview
    2. 2.2 AC-MB Settings
      1. 2.2.1 Audio Serial Interface Settings
        1. 2.2.1.1 USB Mode
        2. 2.2.1.2 Optical or Auxiliary Analog Audio Input Mode
        3. 2.2.1.3 External Audio Interface Mode
      2. 2.2.2 AC-MB Power Supply
    3. 2.3 TAx5x1xQ1EVM-K Hardware Settings
      1. 2.3.1 TAx5412-Q1 EVM Input Hardware Settings
        1. 2.3.1.1 Line Inputs
        2. 2.3.1.2 On-board Microphone Input
      2. 2.3.2 TAC541x-Q1 EVM Output Hardware Settings
    4. 2.4 Diagnostics Hardware Setup
      1. 2.4.1 Short to MICBIAS Setup
      2. 2.4.2 Short to VBAT Setup
      3. 2.4.3 Shorted Input Pins Setup
      4. 2.4.4 Short to GND Setup
    5. 2.5 GPIO1 Hardware Configurations
  9. 3Software
    1. 3.1 Software Description
    2. 3.2 PurePath Console 3 Installation
      1. 3.2.1 USB Audio Setup
    3. 3.3 TAx5x1x-Q1 EVM GUI
      1. 3.3.1 Software Overview
      2. 3.3.2 Configuration View
        1. 3.3.2.1 Device Config Tab
        2. 3.3.2.2 Record Config Tab
        3. 3.3.2.3 Playback Config Tab
        4. 3.3.2.4 Audio Serial Bus Tab
          1. 3.3.2.4.1 Configuring Primary Audio Serial Bus
          2. 3.3.2.4.2 Configuring Secondary Audio Serial Bus
          3. 3.3.2.4.3 Example Configuring I2S Interface
        5. 3.3.2.5 GPIO/Interrupts Tab
        6. 3.3.2.6 Advanced Tabs
          1. 3.3.2.6.1 Diagnostic Tab
          2. 3.3.2.6.2 Programmable Biquads Tab
          3. 3.3.2.6.3 Automatic Gain Control (AGC) Tab
          4. 3.3.2.6.4 Voice/Ultrasonic Auto Detection (VAD/UAD) Tab
          5. 3.3.2.6.5 Mixer Tab
          6. 3.3.2.6.6 Tone Generation Tab
          7. 3.3.2.6.7 Limiter Tab
        7. 3.3.2.7 End System Integration View
        8. 3.3.2.8 Register Map View
        9. 3.3.2.9 I2C Monitor View
    4. 3.4 Configuration Examples
    5. 3.5 System Overview
  10. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
      1. 4.3.1 TAC5412-Q1 EVM Bill of Materials
      2. 4.3.2 TAC5311-Q1 EVM Bill of Materials
      3. 4.3.3 TAA5412-Q1 EVM Bill of Materials
  11. 5Additional Information
    1. 5.1 Trademarks
  12. 6References

2.3.1.1 Line Inputs

For the line input configuration shown in Figure 3-10, the TAx5x1x-Q1 captures the audio signal provided through RCA terminals J2 (IN1), J3 (IN2) or header J47 or J48. The RCA white connector is connected to the INxP and RCA red connector is connected to the INxM. Depending on differential or single-ended configuration, populate J6 or J7 jumper as described in Table 2-1 accordingly. The input accepted in this mode is a differential 10-VRMS full-scale audio signal. If a single-ended source is used, the 5-VRMS signal is supported. The gang potentiometer R43 and R44 provide the input bias resistors for this AC-Coupled input mode depending on the desired input swing and impedance.

Using the TAx5x1x-Q1 AC-Coupled external resistor calculator, enter the maximum input level and the desired MICBIAS voltage to determine the resistance required to achieve full input swing as shown in Figure 2-10.

From the calculator example below, the maximum resistance allowed is 2399.4 Ohm and the closest standard resistance is 2375 Ohm. Based on this standard value resistance, the effective impedance looking into the device is about 2184 Ohm. This effective input impedance forms a high pass filter with the external capacitor. The Vcm is the common voltage for the respective MICBIAS and Input Swing. One can adjust the R50 and R51 potentiometer to get the common mode voltage (Vcm). By default, the EVM Vcm is set to 7.3V with 8 V MICBIAS.

GUID-20230820-SS0I-PGKX-X6Z2-5JMJMV5C471W-low.pngFigure 2-10 AC-Coupled External Resistor Calculator