SBAU473A January   2025  – February 2025 AMC1200 , AMC1200-Q1 , AMC1202 , AMC1300 , AMC1300B-Q1 , AMC1301 , AMC1301-Q1 , AMC1302 , AMC1302-Q1 , AMC1400 , AMC1400-Q1 , AMC21C12 , AMC22C11 , AMC22C11-Q1 , AMC22C12 , AMC22C12-Q1 , AMC23C10 , AMC23C11 , AMC23C12 , AMC23C12-Q1 , AMC23C14 , AMC23C15 , AMC23C15-Q1 , AMC3301 , AMC3301-Q1 , AMC3302 , AMC3302-Q1

 

  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 Assembly Instructions
    3. 2.3 Interfaces
      1. 2.3.1 Analog Input
      2. 2.3.2 Isolated Amplifier (AMC3302) Analog Output
      3. 2.3.3 Isolated Comparator (AMC23C15) Analog Output
    4. 2.4 Power Requirements
      1. 2.4.1 VDD2 Input
    5. 2.5 Test Points
    6. 2.6 Lug Information
  9. 3What to Do and What Not to Do
  10. 4Implementation Results
    1. 4.1 Evaluation Procedure
      1. 4.1.1 Equipment Setup
      2. 4.1.2 Test Procedure
      3. 4.1.3 Full Signal Chain Evaluation Procedure
    2. 4.2 Performance Data and Results
      1. 4.2.1 Shunt Selection Calculations
      2. 4.2.2 Filter Selection
      3. 4.2.3 Thermal Results
  11. 5Hardware Design Files
    1. 5.1 Schematics
    2. 5.2 PCB Layouts
    3. 5.3 Bill of Materials (BOM)
  12. 6Additional Information
    1. 6.1 Trademarks
  13. 7Compliance Information
    1. 7.1 Compliance and Certifications
  14. 8Related Documentation
  15. 9Revision History

4.2.2 Filter Selection

AMC-AMP-50A-EVM AMC-AMP-50A-EVM Filter DiagramFigure 4-4 AMC-AMP-50A-EVM Filter Diagram

The AMC-AMP-50A-EVM performance can be adjusted among four circuit filters. With each filter, there is a tradeoff between noise and propagation delay. The weaker the filter, the shorter the propagation delay.

  • Input Filter:
    .    FC=12πRC=12π×32Ω×10nF=497kHz
    • Selecting a shunt resistor with high inductance when measuring a high frequency signal can cause overshoot in AC measurements. Overshoot caused by parasitic inductance can be compensated for with proper design of the differential RC filter. Optimal input filter design is dependent on inductance of resistor and PCB design. An example simulation is shown below for TINA-TI.
      AMC-AMP-50A-EVM Input Filter TINA-TIFigure 4-5 Input Filter TINA-TI
  • Output Filter (Unpopulated):
    .    FC=12πRC
    • Size for additional filtering as desired.
  • Differential to Single-Ended Filter:
    .    FC=12πRC=12π×7.87kΩ×51pF=397kHz
    • Sized to allow 340kHz AMC3302 output bandwidth. Modify as needed for bandwidth limitations.
  • Single-Ended Output Filter:
    .    FC=12πRC=12π×16Ω×100pF=99.5MHz
    • Modify as needed for single-ended output signal.