Hi You can only get back bits to the degree that the problems are caused by noise. If it is 1/F noise, averaging over long periods is going to be really tough.
Bob > On Jun 6, 2017, at 7:43 PM, Chris Albertson <[email protected]> wrote: > > On Tue, Jun 6, 2017 at 2:17 PM, Attila Kinali <[email protected]> wrote: > >> On Tue, 6 Jun 2017 16:37:27 -0400 >> Bob kb8tq <[email protected]> wrote: >> > > > >> . Heck, the STM32F4xx have so much internal noise that the ENOB >> of their ADC is below 6bit... so low that they even had to write an >> appnote on how to do averaging to get back to the 12 bits the ADC is >> spec'ed for. (but don't mention that to an ST sales person, they will >> hate your guts afterwards). >> > > Can you actually get back all of those bits? How many samples would you > need? My current use case for the STM32 ADC is to track battery voltage > and maybe 6 bits is enough but if I can get to 12 with a software-only fix > I'll take it. Batteries volts charge slowly so I'd have time to take many > samples. It's a rather mundane application. Controlling a battery > powered motor and I can't let theLiPo battery dichange below a limit so I'm > sampling voltage at 1Hz. Got a link to or the name of the app note? > >> >> > -- > > Chris Albertson > Redondo Beach, California > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
