SDAA502 August   2026 TMCS2100-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Error Measurement
    1. 2.1 Overview
      1. 2.1.1 Measurement Accuracy
        1. 2.1.1.1 Offset Cancellation
        2. 2.1.1.2 Signal Magnitude
    2. 2.2 Balanced Three-Phase Calibration
      1. 2.2.1 Equipment Requirements
      2. 2.2.2 Test Configuration
      3. 2.2.3 Calibration Procedure
    3. 2.3 Crosstalk Matrix Calibration
      1. 2.3.1 Theoretical Foundation
        1. 2.3.1.1 Crosstalk Model
        2. 2.3.1.2 Matrix Population by Single-Phase Excitation
        3. 2.3.1.3 Combined-Field Amplitude Under Balanced Operation
      2. 2.3.2 Equipment Requirements
      3. 2.3.3 Calibration Procedure
      4. 2.3.4 Worked Example
      5. 2.3.5 Runtime Crosstalk Cancellation
        1. 2.3.5.1 Implementation
    4. 2.4 Paired-Phase Injection Calibration
      1. 2.4.1 Theoretical Foundation
      2. 2.4.2 Equipment Requirements
      3. 2.4.3 Calibration Procedure
    5. 2.5 Method Comparison
  6. 3Sensitivity Adjustment Procedure
    1. 3.1 Formula
    2. 3.2 Calculation Example
    3. 3.3 Frequency Compensation Values Adjustment
      1. 3.3.1 Step 1: Convert Frequency Compensation Codes to Error Percentages
      2. 3.3.2 Step 2: Compute New Frequency Compensation Codes
      3. 3.3.3 Calculation Example (Continued for Frequency Compensation)
    4. 3.4 GUI Calculator
  7. 4Troubleshooting
  8. 5Summary
  9. 6References

2.3 Crosstalk Matrix Calibration

This method characterizes each bus bar individually by energizing one phase at a time and measuring all three TMCS2100-Q1 sensor responses (\). The nine measured sensitivities form a crosstalk matrix from which the amplitude error under balanced three-phase operation is calculated mathematically, without ever applying all three phases simultaneously. This approach is practical for production stations where only a single-phase DC current source is available, and also yields detailed per-phase diagnostic information that applying a simultaneous three-phase signal does not. Additionally, the crosstalk matrix produced by this method can be used in application firmware to remove residual crosstalk at run time, providing higher accuracy than Gain 2 calibration alone (see Section 2.3.5).


Single-Phase Connection Diagram for Extracting Crosstalk Matrix

Figure 2-4 Single-Phase Connection Diagram for Extracting Crosstalk Matrix