SBOA575 September   2023 INA823 , OPA2387 , XTR115 , XTR116

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Theory of Operation
    1. 2.1 Wheatstone Bridge Sensor
    2. 2.2 2-Amp INA
    3. 2.3 4-20-mA Current Loop Transmitter Interface
  6. 3Simulation
  7. 4PCB Design
  8. 5Verification and Measured Performance
  9. 6Summary
  10. 7Reference
  11.   Appendix

3 Simulation

The design was built and verified in TINA TI simulation software. The circuit uses a DC voltage source at one input of the INA to emulate the differential voltage developed across the bridge. Figure 3-1 shows the circuit schematic and DC operating point when the differential voltage corresponding to 0-lbs is applied at the input.

GUID-20230817-SS0I-P54R-BPKK-R8XQWCWDDMCX-low.svgFigure 3-1 TINA TI Schematic and Simulation for 0-lbs Input