attila@kinali.ch said: > Keep in mind that you will need a good voltage reference as well to reach > anything close to 12bit. Your LDO is _not_ a good voltage reference > (depending on type and load/source conditions they vary eaily by 1-2%... not > to talk about their noise) That applies when using a thermocouple. If using a bridge (or just a divider), you can use the same voltage that powers the bridge as the reference for the ADC and any drift cancels out. -- These are my opinions. I hate spam.

Hi > On Jun 8, 2017, at 3:41 AM, Hal Murray <hmurray@megapathdsl.net> wrote: > > > attila@kinali.ch said: >> Keep in mind that you will need a good voltage reference as well to reach >> anything close to 12bit. Your LDO is _not_ a good voltage reference >> (depending on type and load/source conditions they vary eaily by 1-2%... not >> to talk about their noise) > > That applies when using a thermocouple. If using a bridge (or just a > divider), you can use the same voltage that powers the bridge as the > reference for the ADC and any drift cancels out. If you go utterly crazy and get into the $1,000 and up “traceable standard” thermistors or RTD’s just about everything matters :) Bob > > > -- > These are my opinions. I hate spam. > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.