1 - Noticed there are few electrical parameters in the Datasheet that decides the overall accuracy of the ADC like Reference voltage accuracy, INL, Offset error, Gain error, Buffer offset and few of these have their own drift due to temperature variations. With this I calculate the Total error as explained in this link [https://www.ti.com/lit/an/slaa587/slaa587.pdf] with the formula Total Unadjusted Error TUE = sqrt (sq(Offset Error) + sq(Gain Error) + sq(DNL) + sq(INL)). So the values for the above parameters as converted to voltage are as 244uV, 19.5uV, 512.5uV, 736uV, 270uV . Adding them to the formula I get error of 0.968mV
2 - There is also a mentioning of the Effective resolution for specific OSR (Oversampling Ratio) in the datasheet. Does the effective resolution constitutes all of these and make the work easy for me giving me the final number and hence the accuracy of the system? With this at a over sampling rate of 512, I get an effective resolution of 19.89 bits
Which would be a better approach for knowing error by ADC? With this we can understand both approach and calculation error if any?
Thanks
