SBOA596 May   2024 ADS124S08 , INA326 , MSPM0G3507 , 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

1 Temperature Measure

Temperature is an important parameter for several medical systems and industry producing. In MRI equipment, there needs to be several NTC to monitor liquid-helium temperature. In a ventilator, engineers need to monitor temperature of air and make temperature of air is comfortable for patient. In a CT system, engineer need monitor temperature of DAS system for get best SNR and then high imaging quality. In an IVD system, engineers also need to monitor temperature of samples. In hospital, doctor also need monitor temperature of patient during surgical operations since this is a key parameter of humans. There are several methods based on different principles to measure or monitor temperature. This application note mainly focuses on NTC and RTD methods. The document proposes several designs to interface with NTC and RTD since NTC and RTD is ease of mounting, inexpensive, high-sensitive, high precision and then was widely used in medical systems and industry systems.