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AD7656 Gain Error

Question asked by rgray on Feb 12, 2016
Latest reply on Feb 16, 2016 by NiallM

I have a question on the way the AD7656 is specified in the Specification Table.

The DC Accuracy is specified as Positive Full Scale Error (±0.75% FSR max, ±0.22% FSR Typ) and Negative Full Scale Error (the same values).

 

When I use the device in a Bipolar mode at ±10V it looks like the ADC could have an error of ±150mV (0.75% x 20) at the limits of positive and negative 10 volts.  That would end up as an error of ±1.5% at 10V.  Am I looking at the specification correctly?

 

Thanks,

John

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