SBOA596 May   2024 ADS124S08 , INA326 , MSPM0G1106 , MSPM0G1107 , MSPM0G1506 , MSPM0G1507 , MSPM0G1518 , MSPM0G1519 , MSPM0G3106 , MSPM0G3106-Q1 , MSPM0G3107 , MSPM0G3107-Q1 , MSPM0G3506 , MSPM0G3506-Q1 , MSPM0G3507 , MSPM0G3507-Q1 , MSPM0G3518 , MSPM0G3518-Q1 , MSPM0G3519 , MSPM0G3519-Q1 , OPA387 , PGA900 , REF200

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Temperature Measure
  5. 2Key Challenge to Design a Temperature Monitor
  6. 3Proposed Designs for Temperature Monitor Based NTC or RTD
    1. 3.1 Voltage Excitation
    2. 3.2 Current Excitation
    3. 3.3 Ratio Measure
    4. 3.4 Integrated Designs
  7. 4Summary
  8. 5References

4 Summary

This application note discussed several designs for RTD/NTC sensor signal conditioning. The potential was used for other resistor-based sensor signal conditioning such as PTC, optic-sensing resistor, magnetic-sensing resistor and so on. There are several articles and products from TI that can help customer to design a resistor-based temperature signal conditioning circuit. Consult your FAE, TI.com for detailed information, support, and help. For easy to select best designs for a specific application, Table 4-1 shows the difference between these designs.

Table 4-1 Comparison Between Proposed Signal Conditioning Designs
Item Voltage-excite Current-excite ratio MSPM0G3507 PGA900
Performance best best better good better
Lead Compensation better best best better good
Flexibility best best better good Better
Design difficult middle easy middle middle
PCB area large large small smallest smallest
Cost High cost High cost Middle cost Low cost Middle cost