[time-nuts] What do people use for measuring temperature?

[Bob kb8tq]

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 at 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
> 
> 
> 
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