niconiconi on Nostr: nprofile1q…rh0j7 Advantages of diodes: Readily available, low cost, can be ...

nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpqp4ca2k6hgmdydsfcmq8rq3fgzmwkct505d7paqmnyaffh5nwc5ksdrh0j7 (nprofile…h0j7) Advantages of diodes: Readily available, low cost, can be integrated in ICs, and finally parasitic diodes can be exploited to reach hard-to-access internal locations inside ICs and modules. But the disadvantage is the need of manually characterizing them, including matching the IV curve, linearize the temperature coefficient, and other compensations.

Meanwhile, Pt RTDs are the benchmark of temperature measurements, the highest-grade ones are used as the ITS-90 temperature standard to calibrate all other thermometers in existence. Industrial-grade ones are not that good but the characteristics are pretty much guaranteed, linear, and well-matched. Are there really other real disadvantages other than cost? I guess corrosion resistance can be one, so I may eventually switch to a thermocouple.

So I see no reason to create more tasks for myself by using diodes. I'm interesting in doing an experiment about temperature, not doing an experiment about temperature sensors.