SLYA042 July   2024 FDC1004 , FDC1004-Q1

1.   1
2.   Abstract
3.   Trademarks
4. 1 Introduction
5. 2 CSAs and Input Bias Stage
6. 3 CSA and Gain Error Factor
7. 4 Applications for Resistance at Input Pins of Current Sense Amplifiers
   1. 4.1 Input Resistance Design Considerations
8. 5 Applications for Input Resistance at Reference Pins of Current Sense Amplifiers
   1. 5.1 Bidirectional CSA and Applications
   2. 5.2 Driving CSA Reference Pin With High-Resistance Source Voltage
   3. 5.3 Input Resistance at Reference Pin Design Considerations
9. 6 Design Procedure and Error Calculation for External Input Resistance on CSA
   1. 6.1 Calculating eEXT for INA185A4 With 110Ω Input Resistors
10. 7 Design Procedure for Input Resistance on Capacitively-Coupled Current Sense Amplifier
    1. 7.1 Bench Verification of Input eEXT for Capacitively-Coupled Current Sense Amplifiers
11. 8 Design Procedure for Input Resistance at CSA Reference Pins
12. 9 Input Resistance Error Test with INA185 Over Temperature
    1. 9.1 Schematic
    2. 9.2 Methods
    3. 9.3 Theoretical Model
    4. 9.4 Data for INA185A4 with 110Ω Input Resistors
       1. 9.4.1 Data Calculations
    5. 9.5 Analysis
13. 10Input Resistance Error Test with INA191 Over Temperature
    1. 10.1 Schematic
    2. 10.2 Methods
    3. 10.3 Theoretical Model
    4. 10.4 Data for INA191A4 With 2.2kΩ Input Resistors
       1. 10.4.1 Data Analysis
    5. 10.5 Analysis
14. 11Derivation of VOS, EXT for a Single Stage Current Sense Amplifier (CSA)
15. 12Summary
16. 13References

Input Resistance Error for Current Sense Amplifiers