Thermistor
Thermistor
(OP)
I need a linear circuit for a thermistor that has at least +/- 0.5 Deg C accuracy. Anyone tackle this before?
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RE: Thermistor
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RE: Thermistor
RE: Thermistor
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Thermistor
thermistors with different -- even positive or negative --
temp. coeff. The networks you have found combine these
effects to improve the linearity.
On a single 6 thermistor temp. sensor you may reach .5C accuracy by calibration. The simplest would be using a microcomputer ( OP.AMP with noise filter, A/D converter and calibration table in the uC)
If you think for mass production, I would use some different e.g. resistive sensor . A welldesigned
diode-sensor may only have to be calibrated at two
points ( 0 and 100 C) to satisfy your need -- less
than 5 minutes per assembly.
----------------------------
Please read FAQ240-1032: How to ask a meaningful question
My WEB: <http://geocities.com/nbucska/>
RE: Thermistor
RE: Thermistor
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Thermistor
I suggested the micro, the OP is not willing to read my FAQ
or disclose any more info.
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Please read FAQ240-1032: How to ask a meaningful question
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RE: Thermistor
HeHe!!
RE: Thermistor
Sorry for not answering your question, so
*** YES ***
----------------------------
Please read FAQ240-1032: How to ask a meaningful question
My WEB: <http://geocities.com/nbucska/>
RE: Thermistor
Hopefully the OP will get back to us.
Here's two links (I had time to look up just now, again, as I was reading them just last night!), that discuss sub 10th degree stuff.
ht
h
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Thermistor
http://w
Out of the box accuracy for simple sensors is not much better than 1ºC:
http://www.national.com/pf/LM/LM92.html
TTFN
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RE: Thermistor
Thanks again.
RE: Thermistor
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Sometimes I only open my mouth to swap feet...
RE: Thermistor
TTFN
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RE: Thermistor
I've found myself in the same situation of trying to find a simple hardware solution. Unfortunately I haven't found a solution yet.
I'm not trying to hi-jack your thread, nor do I want to start a new one since your issue is very similar. I figure an inquiry on how far along you have come might be more appropriate.
Hope all is well!