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

3.3.7.4 Results

Table 3-7 and Figure 3-7 show the TLV387 band pass filter frequency response data and graph.

Table 3-7 Band Pass Results
FREQUENCY INPUT VOLTAGE OUTPUT AMPLITUDE (V) NORMALIZATION FACTOR V/V dB
100 3.76 0.504 2 0.268085 –11.4345
500 2.8 1.78 10 6.357143 16.06524
1000 0.72 0.82 20 22.77778 27.15023
2000 0.72 1.56 40 86.66667 38.75704
4000 0.72 2.56 80 284.4444 49.07995
6000 0.72 3.16 120 526.6667 54.43072
8000 0.72 3.48 160 773.3333 57.76733
10,000 0.72 3.6 200 1000 60
12000 0.72 3.56 240 1186.667 61.48657
14000 0.72 3.52 280 1368.889 62.72736
16000 0.72 3.4 320 1511.111 63.58593
18000 0.72 3.28 360 1640 64.29688
20000 0.72 3.08 400 1711.111 64.66556
25000 0.72 2.76 500 1916.667 65.65093
30000 0.72 2.36 600 1966.667 65.87462
35000 0.72 2.06 700 2002.778 66.03266
45000 0.72 1.54 900 1925 65.68861
55000 0.72 1.19 1100 1818.056 65.19214
65000 0.72 0.928 1300 1675.556 64.48318
80000 0.72 0.64 1600 1422.222 63.05935
100000 0.72 0.444 2000 1233.333 61.82161
200000 0.72 0.116 4000 644.4444 56.18371
400000 0.72 0.036 8000 400 52.0412

TIDA-010987 TLV387 Band Pass Filter Frequency Response

Figure 3-7 TLV387 Band Pass Filter Frequency Response