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[In addition to the answers which have already been posted.] A current sensing circuit like this lends itself to another scheme for ESD protection, which uses only one TVS. Only the line in which...
Answer
#1: Initial revision
by
Nick Alexeev
·
2020-11-08T20:09:17Z (about 4 years ago)
*[In addition to the answers which have already been posted.]* A current sensing circuit like this lends itself to another scheme for ESD protection, which uses only one TVS. Only the line in which you're sensing the current is exposed to ESD. The small value current-sense resistor will keep the differential inputs at approximately the same potential[^1]. So, one TVS on the CURRENT_IN (or the CURRENT_OUT net) will protect both of the differential amp inputs. That TVS will also protect other components which are powered with that current. [^1]: Compared to ESD voltages