From the thread, comment by John Larkin:
> I've mentioned the Susumu thinfilms here more than once. We have a
>
> huge "tower" sample kit that the local Susumu rep dropped off, must be
>
> a couple thousand resistors. We buy parts down to 0.05% and we are
>
> measuring TCs in the 5 PPM range.
>
That's another topic in itself.
Take a specified 25ppm TC resistor part, what would be the value used for worst case calculations. The 25ppm is probably a long way from the actual TC due to manufactor "cover my ass" policies.
Anyone have numbers for that and how the trend/graph typically looks?
Do part from same lot or even manufactor tend to track, so the resultant TC of say a resistive divider isn't just the squared root sum of the individual TCs?
Regards
Klaus