> >> lookup table in the PIC with linear interpolation
> between the two points

> >> where the ADC value landed. Accuracy is better
> than 0.1degree C or
> >> 0.1degree F in the temperature range of interest
> (90 to 110 degrees F).

Hi Harold,

If all the needed range for accuracy was between 90
and 110, why not use an opamp and the internal 10 bit
ADC? You can feed the unamplified signal to another
channel, so you get rough temperature, and the amped
channel with 1000 points gets you better than .05
degree resolution.

Opamp and a few good resistors will cost you a lot
less than a 20 bit ADC.

Cheerful regards,

Bob

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