TIDUFG0 November   2025

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
  8. 2System Overview
    1. 2.1 Block Diagram
      1. 2.1.1 PCB Rogowski Coils
      2. 2.1.2 Integrator Stage
      3. 2.1.3 Input Stage
      4. 2.1.4 Differential Amplifier Stage
      5. 2.1.5 High-Bandwidth, Low-Noise Amplifier Stage
        1. 2.1.5.1 Hybrid Integrator
        2. 2.1.5.2 Band Pass Filter
        3. 2.1.5.3 Logarithmic Amplifier
    2. 2.2 Design Considerations
      1. 2.2.1 Component Selection
      2. 2.2.2 RC Component Selection
      3. 2.2.3 Gain Setting
    3. 2.3 Highlighted Products
      1. 2.3.1 INA333
      2. 2.3.2 TLV9002
      3. 2.3.3 LM2664
      4. 2.3.4 TLV2387
      5. 2.3.5 LOG300
      6. 2.3.6 TL081H
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Test Setup
      1. 3.2.1 Metering Setup
        1. 3.2.1.1 Accurate Current Source
        2. 3.2.1.2 TIDA-010987
        3. 3.2.1.3 ADS131M08 Metrology Evaluation Module
        4. 3.2.1.4 GUI
      2. 3.2.2 5kHz to 50kHz Band Pass and Logarithmic Amplifier Test Setup
        1. 3.2.2.1 Oscilloscope
        2. 3.2.2.2 Function Generator
    3. 3.3 Test Results
      1. 3.3.1 No Load Conditions
        1. 3.3.1.1 Objective
        2. 3.3.1.2 Setup
        3. 3.3.1.3 Requirements
        4. 3.3.1.4 Results
      2. 3.3.2 Starting Load Test
        1. 3.3.2.1 Objective
        2. 3.3.2.2 Setup
        3. 3.3.2.3 Requirements
        4. 3.3.2.4 Results
      3. 3.3.3 Active Power Measurements
        1. 3.3.3.1 Objective
        2. 3.3.3.2 Setup
        3. 3.3.3.3 Requirements
        4. 3.3.3.4 Results
      4. 3.3.4 Variation of Power factor
        1. 3.3.4.1 Objective
        2. 3.3.4.2 Setup
        3. 3.3.4.3 Requirements
        4. 3.3.4.4 Results
      5. 3.3.5 Variation of Voltage Test
        1. 3.3.5.1 Objective
        2. 3.3.5.2 Setup
        3. 3.3.5.3 Requirements
        4. 3.3.5.4 Results
      6. 3.3.6 Variation of Frequency
        1. 3.3.6.1 Objective
        2. 3.3.6.2 Setup
        3. 3.3.6.3 Requirements
        4. 3.3.6.4 Results
      7. 3.3.7 Band Pass
        1. 3.3.7.1 Objective
        2. 3.3.7.2 Setup
        3. 3.3.7.3 Requirements
        4. 3.3.7.4 Results
      8. 3.3.8 Logarithmic Amplifier
        1. 3.3.8.1 Objective
        2. 3.3.8.2 Setup
        3. 3.3.8.3 Requirements
        4. 3.3.8.4 Results
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
      3. 4.1.3 PCB Layout Recommendations
        1. 4.1.3.1 Layout Prints
    2. 4.2 Tools
    3. 4.3 Documentation Support
    4. 4.4 Support Resources
    5. 4.5 Trademarks
  11. 5About the Author

3.3.6.4 Results

Table 3-6 shows the variation of frequency results.

Table 3-6 Variation of Frequency Results
FREQUENCY ERROR 1 ERROR 2 ERROR 3 ERROR 4 ERROR 5 DELTA ERROR AVG ERROR % DELTA FROM REF LIMIT (%)
[CLASS 0.1] 		LIMIT (%)
[CLASS 0.2]
TEST CURRENT (TA)
1.5 1.5 1.5 1.5 1.5
50 (REF) 0.067 0.18 0.112 0.164 –0.066 0.246 0.0914 (REF) REF REF
49 0.193 –0.126 0.059 0.176 0.23 0.356 0.1064 0.015 ±0.05 ±0.1
51 0.152 0.224 0.187 0.177 –0.195 0.419 0.1090 0.018 ±0.05 ±0.1
60 (REF) –0.048 0.140 –0.069 –0.139 –0.080 0.279 –0.0392 (REF) REF REF
58.8 –0.08 –0.073 0.099 0.042 –0.025 0.179 –0.0074 0.032 ±0.05 ±0.1
61.2 0.13 –0.107 0.11 –0.296 0.076 0.426 –0.0174 0.022 ±0.05 ±0.1
TEST CURRENT (TA)
15 15 15 15 15
50 (REF) 0.008 –0.028 –0.036 –0.006 –0.014 0.044 –0.0152 (REF) REF REF
49 0.007 0.016 0.000 0.000 –0.012 0.028 0.0022 0.017 ±0.05 ±0.1
51 –0.008 –0.033 0.010 0.008 0.000 0.043 –0.0046 0.011 ±0.05 ±0.1
60 (REF) 0.069 0.073 0.097 0.085 0.050 0.047 0.0748 (REF) REF REF
58.8 0.079 0.090 0.095 0.094 0.094 0.016 0.0904 0.016 ±0.05 ±0.1
61.2 0.097 0.079 0.086 0.013 –0.002 0.099 0.0546 0.020 ±0.05 ±0.1