SBOU211A October   2018  – July 2025 INA105 , INA106 , INA132 , INA134 , INA137 , INA143 , INA152 , INA154 , INA157 , INA333 , INA592 , INA600

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 General Texas Instruments High Voltage Evaluation (TI HV EMV) User Safety Guidelines
    3. 1.3 Features
    4. 1.4 Diff-amp Pinout
    5. 1.5 Compatible Devices
  7. 2Hardware
    1. 2.1 Power
    2. 2.2 Inputs
    3. 2.3 Output
      1. 2.3.1 Output Filtering
    4. 2.4 Reference
    5. 2.5 Miscellaneous
    6. 2.6 Configurations
      1. 2.6.1 Difference Amplifiers (SOIC-8 and VSSOP-8)
      2. 2.6.2 Difference Amplifiers (SOT23 and SOT-SC70)
      3. 2.6.3 Reference Amplifier
        1. 2.6.3.1 Buffered Reference Voltage Connection
        2. 2.6.3.2 AC Coupled Output
  8. 3Hardware Design Files
    1. 3.1 Schematic
    2. 3.2 PCB Layout
    3. 3.3 Bill of Materials (BOM)
  9. 4Additional Information
    1. 4.1 Trademarks
    2. 4.2 Related Documentation
  10. 5Revision History

2.6.1 Difference Amplifiers (SOIC-8 and VSSOP-8)

This EVM allows for many jumper-selectable configurations. Pins 1, 2, 3, and 5 of the amplifier are routed to headers that allow the user to define what connections are made to the internal resistors. Note it is always necessary for either pin 2 or pin 5 to route to the output to ensure closed loop operation with negative feedback. Figure 2-1 shows several ways to configure the jumpers and the associated transfer function. The exact gain depends on the ratio of resistors used in the selected difference amplifier. If the resistors in the difference amplifier are not all equal, then reciprocal gains can be achieved in each configuration as shown in the top two figures.

Common Difference Amplifier Configurations Figure 2-1 Common Difference Amplifier Configurations