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## Adc Calibration Gain And Offset

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Users Badges Unanswered Ask Question _ Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, adc offset error correction students, and enthusiasts. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top How to https://e2e.ti.com/blogs_/b/precisionhub/archive/2014/10/14/adc-accuracy-part-2-total-unadjusted-error-explained calculate total ADC error after adjustment/calibration? up vote 1 down vote favorite 1 I’ve some different ADC channels, extended/standard channels and Precision channels. So far I know should the TUE (total unadjusted error) be calculated like this: \$TUE = \sqrt{e_{offset}^2 + e_{gain}^2 + e_{DNL}^2 + e_{INL}^2} \$ For the 12bit ADC datasheet, that gives: \$TUE = \sqrt{(6^2+4^2+1^2+3^2} = 7.87 \$ (If looking at the datasheet it must correspond to the extended channel without http://electronics.stackexchange.com/questions/237227/how-to-calculate-total-adc-error-after-adjustment-calibration current injection) and for the 10bit: \$TUE = \sqrt{0.5^2+0.6^2+1^2+1.5^2} = 1.96\$ (If looking at the datasheet it must correspond to the precise channel without current injection) This is confusing me, but my guess is however that the stated Offset error, Gain error, INL and DNL corresponds to different channels in each of these datasheets. The 10bit Datasheet (see page 80-87) Now if I’ve thought right above : I do wonder how I can calculate the compensated maximum error after adjustments/calibrations for the Offset error and Gain error? My guess is that I could just simply take away the offset error and gain error for the TUE equation for the 12 bit “extended channel without current injection” and the 10 bit “precise channel without current injection”. But how do I do for the other channels which don’t have the Offset error, Gain error, INL and DNL stated? How do I calculate the maximum error after calibration/adjustment for them? I hope someone can be kind and help me. Best regards adc error calibration share|improve this question edited May 31 at 7:05 asked May 30 at 14:25 Anton Ingemarson 62 1 You should really say which ADC this is, if its datasheet is publicly available. –Marcus Müller May 30 at 15:57 The 10bit ADC datasheet have been added. The other