[time-nuts] Testing the TAC, and a question about ADEV

Bruce Griffiths bruce.griffiths at xtra.co.nz
Sat Dec 29 06:50:28 UTC 2012

Fabio Eboli wrote:
> Bruce, Bob, now I have more questions
> than before :)
> Fabio.
> P.S. The micro's adc is charachterized
> for total unadjusted error of +-2LSB Max
> at 25°C, 12bit total.
> It's s-h is 8pF with 1kohm in series,
> probably I can sync the sampling to
> open just before the pulse, and close
> after the fact.
What error is that:
gain error?
offset error?
integral nonlinearity?
What about monotonicity or differential linearity?

A worst case assumption would be that the ADC is perhaps only monotonic 
for the 11 most significant bits.


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