> The INA circuitry shouldn't affect the voltage drop across the sense
> resistor much; the inputs on the INA are quite high impedance.
>=20
> I think something deeper is wrong here- a layout or assembly issue,
> perhaps.

I tend to agree. I've not used the INA parts, but do use the ZXCT1009
in PSUs. It's also a resistive shunt, with fewer smarts

http://diodes.com/datasheets/ZXCT1009.pdf

Joe
--=20
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