Part number is ACS750SCA050 .

With 5V in, provides a nom 2.5V output with no current
flowing. The chart indicates high accuracy in either direction
out to 50A. Insertion R is 130uOhm. Looks like all I have to
do is to acquire the 2.5V level when powering up (assuming
no current flow).

The specs are so good I am skeptical. Anybody?

--Bob
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