Re: Contact Thermometer for Component Temperature
- From: John Devereux <jdREMOVE@xxxxxxxxxxxxxxxxxx>
- Date: Thu, 14 Feb 2008 19:18:35 +0000
D from BC <myrealaddress@xxxxxxxxx> writes:
I've been looking around and haven't found it yet..
Where can I find a small temperature sensor on a long probe (like a
scope probe) to measure the temperature on 8pin SOIC chips and 1206
resistors?
The probe plugs in a DMM or similar readout.
Or do I get the E*bay rectal thermometer? :P
What a pita...
I have not tried this myself... but I gather you can get the junction
temperature of a part by measuring the forward voltage drop of the
internal input ESD protection diodes. I guess this would amount to
sticking a few negative microamps in and measuring the voltage. You
could calibrate first with an external thermometer and an unpowered
device. Etc.
--
John Devereux
.
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