Would not a band-gap temperature sensor such as the LT6657 be better than a thermistor for precision, low drift applications? The above device has 30 ppm/√kHr long-term drift. That should hold a mk for a fair few years. John https://www.analog.com/media/en/technical-documentation/data-sheets/6657fd.pdf

Hi You would need to find a temperature sensor rather than a voltage reference…. :) The AD590 still seems to be considered a pretty good device after all these years. If there is long term data in the spec sheet, I did not spot it in a quick read. Based on what we saw back in the 1970’s (which *is* a long time ago) mili-K / month is a bit ambitious for a 590. Indeed a band gap device will have a much wider useful range than a thermistor mounted in a bridge circuit. The thermistor only “wins” if you are interested in a fairly narrow temperature range. Bob > On Sep 27, 2020, at 2:49 PM, John Moran, Scawby Design <john@scawbydesign.co.uk> wrote: > > Would not a band-gap temperature sensor such as the LT6657 be better than a thermistor for precision, low drift applications? > > The above device has 30 ppm/√kHr long-term drift. That should hold a mk for a fair few years. > > John > > https://www.analog.com/media/en/technical-documentation/data-sheets/6657fd.pdf > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there.