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If you go to this link:

http://en.wikipedia.org/wiki/Common-mode_rejection_ratio

and scroll all the way down to the bottom where they show the:

"Example: operational amplifiers"

section.... we have:

I get +/-222mv ???? So for example, an op-amp with 90dB CMRR operating with 10V of common-mode will have an output error of ±316uV.Click to expand...

Am I doing the math wrong?

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# CMRR formula gives wrong result!

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