SLAU936 August   2024 TAS2120

 

  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. 2Quick Start Guide
    1. 2.1 TAS2120EVM Setup for Software Mode
    2. 2.2 TAS2120EVM Setup for Hardware Mode
  9. 3Hardware
    1. 3.1  AC-MB Settings
      1. 3.1.1 Audio Serial Interface Settings
      2. 3.1.2 USB Audio AC-MB Settings
      3. 3.1.3 External Audio AC-MB Settings
    2. 3.2  AC-MB Power Supply
    3. 3.3  Default Jumper Setting on TAS2120EVM
    4. 3.4  I2C Target Address Selection
    5. 3.5  IOVDD Power Supply Options
    6. 3.6  AVDD Power Supply Options
    7. 3.7  VBAT Power Supply Options
      1. 3.7.1 VBAT 3S EVM Hardware Configuration
    8. 3.8  IOVDD_BUFF Power Supply Options
    9. 3.9  Speaker Outputs
    10. 3.10 2-Channel Configuration
    11. 3.11 4-Wire Measurement of Load
  10. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials
  11. 5Additional Information
    1. 5.1 Trademarks

3.11 4-Wire Measurement of Load

TAS2120EVM has been designed such that the dummy load or speaker load connected to the device can be measured very accurately directly from the device pin including board parasitic and connector contact resistance using 4-wire method in digital multimeter. Pin header have been provided to be able to connect digital multimeter in 4-wire mode as shown below Figure 3-9.

Connect HI of DMM to pin-1 and HI_SNS of DMM to pin-2 of TP19 test point.

Connect LO of DMM to pin-2 and LO_SNS of DMM to pin-1 of TP20 test point.

TAS2120EVM Load DC Resistance Measurement in 4-Wire Mode using Digital MultimeterFigure 3-9 Load DC Resistance Measurement in 4-Wire Mode using Digital Multimeter