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Diagram of the measurement circuit used for the temperature sensors.

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• The AD592 is powered by 12V (supplied by the Galil)

• The AD592 outputs 1 micro-Amp / K.

• The 10k Ohm resistor converts this amperage change to a voltage change (via Ohm’s law):

V = I*R
0.01 V/K = 1 uA/K * 10^{^4} Ohm.

• This voltage change is then sensed by the Galil’s ADC.

Originally from Dale Sandford (UCO).

Galil ADC calculations for the AD592 temperature sensors.

12 bit over 5V = 0.001 V per ADU;
AD592 gives 0.01 V per K;
So measurement resolution is:
0.1 K per ADU (OK for these sensors)

Based on values within datasheet below.