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Forum Post: RE: ADS1209: Gain error and reference voltage.

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Hi Tom Thank you for your answer. I just wonder, if the Gain Error parameters include the errors of the internal reference why are the errors of the reference then much bigger than the Gain Errors stated? e.g. Gerr : max 0.5% FSR compared to Vrefout: max 2.550V coresponding to (0.050 / 2.500)*100 = 2% TCGerr: typical +/-1.3 ppm/degC compared to TCVrefout: typical +/-20 ppm/degC What I actually need to know is the max and min Gerr and TCGerr, when using an ideal external reference? Best regards Ole

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