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orcad thermistor simulation

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skarthikshines

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how to simulate the kty81 themistor in orcad 16.3... pls help me any body
 

Simulate in which regard? Temperature dependency? Self-heating? Non-linear characteristics?
 

The SPICE resistor model supports linear and quadratic TC parameters. You have to extract the parameters from the resistance versus temperature table.

I get R = 819.4*(1 + 0.008576*t + 10.22e-6*t²) over the full -55 bis +150°C range. A respective netlist entry in SPICE would look like this:
Code: 
RKTY node+ node- 819.4 TC=8.576e-3,10.22e-6

Alternatively you can use controlled voltage or current sources with a piecewise linear TABLE model and enter the full datasheet table. Or calculate a higher order polyniomial fit and use a POLY model.
 

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