• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 64 subscribers
  • Views 211 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

choosing Thermisitors

Lucas Pucheta
Intellectual 300 points
Other Parts Discussed in Thread: TMP117, TMP116

Could you help me find the best thermistor for my application? We are doing a quick spin of our clinical-grade patch to assist in the monitoring that is ramping up around the current COVID-19 pandemic. 

The thermistor option you provided (TMP117 & TMP116) is quite expensive and much more accurate than I would need. We are okay with 1% accuracy. You are competing against a 0402 size standard thermistor which is very cost-effective. To make it easy for our engineers we were thinking a 10kohm value thermistor would work fine and analog output is best for us.

Thank you!

  • 0
    TI__Genius 9380 points

    Lucas,

      Take a look at the TMP6131DEC. First you need to remember that 1% error, at 98.6F is +1 = 99.6F/-1 = 97.6F. When taking a temperature of a person, 1% is to much. you most likely need closer to 0.1%, but that is my thoughts on fever measuring. The TMP6131DEC will need a one time offset correction, but can be as accurate as 0.5%. With a little engineering it could be closer to 0.3%.

      Make sure to look at the design tool for the TMP6131DEC as it will help you a lot.

      The TMP117 is calibrated for you. The cost is usually offset by not having to calibrate.