[time-nuts] uC ADC resolution (was: Poor man's oven)
hmurray at megapathdsl.net
Thu Jun 8 03:41:29 EDT 2017
attila at 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.
More information about the time-nuts