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CN-0359 Circuit Design

Question asked by henrique on Dec 4, 2016
Latest reply on Dec 10, 2016 by henrique

Hello, congratulations for your numerous of circuit notes, they offer a nice range of possibilities. I'm writing you regarding the CN-0359's analog circuit, more specificaly in the current sensing part. I cannot understand why do have the U18, the AD8253 there. It's the instrumentation amplifier measuring the difference between the TIAmplifier and ground,what is the advantage of having it there? its mesuring to the ground so its output will be always V2p-p + 1.65V.

Thank you.