Other Parts Discussed in Thread: TMP117
I am looking for a spec for self heating for the TMP235 temperature sensor.
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Hi Chris,
There's no self-heating spec for temperature sensors. We have some information on self-heating for the TMP117, because it is a 0.1C accurate device. In that device, certain configurations show 10-70 milliCelsius (0.01-0.07C) of positive error due to self-heating. There is no concern about TMP235 failing to meet its 1C max spec due to self-heating.
If you have a specific application that you're concerned about, please let us know how we can better serve you.
thanks,
ren
Hi Ren,
Thanks for the response. I am working with a chemical distributor in specifying thermal transfer compounds for our application and we need to know what to expect in regards to self heating. I am expecting this to be extremely low.
Can you offer any information?
Thanks,
Chris
Chris,
TMP235 is specified to supply up to 500uA output current. The quiescent current is only 17uA max, worst case. The self-heating is going to be dominated by the output current and output load you attach.
thanks,
ren