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Subject: Re: My a/d result jump up and down,why?

Date: 06/04/03 at 8:38 AM
Posted by: Dean Huster
E-mail: dhhuster@semo.net
Message Posted:

In Reply to: My a/d result jump up and down,why? posted by sarcophile on 05/20/03 at 12:33 PM:

Consider also that your conversion could be up to 100 times more precise than the analog value of your temperature measuring circuit. This means that your conversion could actually be following the normal bumps and gurgles at the output of the temp sensor that less-precise conversion circuits might not "see". Also consider the fact that your converter output is resolving down to about 0.03% which translates to a temperature resolution of 0.03 at 100. If your sensor is only good to 1, you have a couple of invalid digits at the output of your A/D converter that have to be tossed out for a quantative measurement. They're maybe OK for watching short-term trends, but not for actual measurement.

Dean


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