Electronics > Metrology

MAX6226 voltage reference

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dietert1:
After three months of operation one could try correlation plots of each channel agains temperature in order to derive a TC, e.g. for the last data taking period. The resulting TC values will contain a common contribution from the DVM you use. If you then plot the residuals after numerically subtracting the average TC effect for each reference, unexpected changes will be much easier to pin down. I'd guess all your references together can make a sub-ppm voltage standard.

Regards, Dieter

exe:
My friends, on the latest plot I missed that ic1 went nuts. This is weird. I only see the jump correlates with drop of humidity. May be hermetic sealing is broken or something... Idk, 8 ppm sudden change is very suspicions, considering other references don't behave like that.

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