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

2.3.2 Isolated Amplifier (AMC3302) Analog Output

AMC-AMP-50A-EVM AMC-AMP-50A-EVM Isolated Amplifier (AMC3302) Analog OutputFigure 2-3 AMC-AMP-50A-EVM Isolated Amplifier (AMC3302) Analog Output

Figure 2-3 shows the analog output circuit for the AMC-AMP-50A-EVM AMC3302 signal chain.

The AMC3302 differential output is accessible to the user through test-points OUTP and OUTN. The passive components R6, R9, and C15 give a footprint for a differential anti-aliasing filter. R6 and R9 are 0Ω by default configuration and C15 is unpopulated by default configuration.

The AMC3302 single-ended output is accessible to the user through testpoint OUT(SE) with respect to GND. A two-channel operational amplifier TLV9002 is used to transform the differential output signal to a single-ended signal. Passive components R4, R7, R10, R12, C11, C17 and C18 serve as differential to single-ended filtering and set the gain of the operational amplifier. C11 and C18 are unpopulated by default configuration. See the Isolated Current-Sensing Circuit with ±250mV Input Range and Single-Ended Output Voltage application note for more information on differential to single-ended signal conversion.

Passives R1, R3, and C2 derive a common-mode voltage that is buffered by the second channel of the TLV9002 at the midpoint from the power supply to prevent common-mode shifting.

Passive components R11 and C16 make an RC filter on the single-ended output with a cutoff frequency of 99.5MHz.

Capacitors C7, C8, and C9 help attenuate common-mode signals. Capacitor C6 serves as a decoupling capacitor.