Hi ADI,
I have been happy to brush up on my op-amp theory with your mini tutorials and think I spotted a small typo in an equation. On page 2, the (V2-Vref) chunk should be multiplied by the resistor ratio of that input, similar to Eq. 4.
See attached image for possible correction.
http://www.analog.com/media/en/training-seminars/tutorials/MT-214.pdf
What do you think?
-Mike
