NTC characteristic liniarization

[mariuszoll]

Hi,

In order to read the temperature from my board I use an NTC Thermistor. I put a resistor in parallel with the NTC, in order to liniarize the NTC R/T characteristic.
Could somebody help me with the calculation value of the parallel resistor?

Thank you in advance.

 

[neddie]

Have you got the datasheet for the NTC. Could be easier to just work out temp from resistance. I did something similar with a look up table of the NTC values at various temperatures.
NTC in voltage divider. You can calculate the voltage across NTC and hence the NTC value. Lookup table then gives temperature. Pretty accurate.
Cheers
Neddie

 

[crutschow]

A parallel resistor will only somewhat linearize the output of a NTC over a limited temperature range. Better to use a lookup table as neddie suggested.