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INA3221: How to calculate total sensed current error

Part Number: INA3221

Hi,

I would like to understand how the total sensed current error given as an output from the "Current sense amplifier error analysis INA3221" tool on INA3221 product page calculated. I put in the parameters below and saved the output from the tool as an excel file (attached in this thread). Can you explain how the total error for the 1A case (row 2) is calculated at 25C and at operating temp?

Total_Error_vs_Sensedcurrent.csv

Thanks,

Noman