> >> All this is hypothetical if you are using the internal Aref as it is >> only 2.56V (haaaaaa why be so presise with the voltage ie to 2 decimal >> places when heat and supply variations make it nowhere near that acurate) On my M128's we were getting 2.7V. 10% drift on a "precision reference" for use with a 10 bit A/D. Now that's funny! :-P >> I would use an external Vref something like a 4.096V reference chip. That. or VCC if it's reasonably accurate.
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Re: [AVR-Chat] low-battery detection, ADC, and ICP of mega16
2004-05-24 by David VanHorn