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Current Sense Amplifier INA180 Negative Supply Measurement?

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hal9001:
I want to measure supply side current for a -12V supply with a current sense amplfier like INA180.
Do I have to reverse the IN- and IN+ pin for IN- to connect to the -12V supply side of the sense resistor and IN+ to connect to the load side of the sense resistor?

From the data sheet

--- Quote ---These devices are part of a family of current-sense amplifiers that sense voltage drops across current-sense resistors at common-mode voltages from–0.2 V to +26V, independent of the supplyvoltage.
--- End quote ---


Cheers!

ledtester:
It would be helpful to have a schematic which also shows how the INA180 is powered. Then we can make sure all of the voltage limits are met.

hal9001:

--- Quote from: ledtester on November 28, 2021, 02:32:12 pm ---It would be helpful to have a schematic which also shows how the INA180 is powered. Then we can make sure all of the voltage limits are met.


--- End quote ---
Cheers!

ledtester:
I'm pretty sure that's not going to work -- you need IN- to be at or above the supply voltage ground.

That is, the INA180 supply ground is really -12V and Vs is 2.7 to 5.5 V above that.

coromonadalix:
Have you read the datashhet for high side, low side measurements ?

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