ADC Error Calculation

[flamz_dude]

I am trying to determine DC errors for ADC128S102QML-SP. More specifically, I am referring to the gain error, offset error, INL error, and DNL error. It is a 12 bit ADC with a supply voltage of 5V.

From the datasheet, I concluded the following:

1. Offset error is 2.3 LSB which I believe translates to an error of
   (2.32/2^12) x 5 = 2.81mV
   
   
2. INL is 1.4 LSB which I believe translates to an error of
   (1.4/2^12) x 5 = 1.71mV
   
   
3. DNL is 1.5 LSB which I believe translates to an error of
   (1.5/2^12) x 5 = 1.83mV
   

Does the above calculations make sense? Also, how I can calculate the gain error?

 

[barry]

I don't think you can CALCULATE gain error, you have to measure it if the manufacturer doesn't specify it.

This might help: https://microchipdeveloper.com/adc:adc-gain-error

 

[KlausST]

Also, how I can calculate the gain error?

Datasheet uses the term "full scale error".

Klaus