Dear Sirs,
we are working to implementing a current sensing on a 40A H-bridge @ 300V DC link and we choosed the DRV401 for the isolated current measurement,
interfacing to closed loop-magnetic sensor VAC-T60404-M4645-X211.
Unfortunately during debug test we have detected an offset of 66mV on the signal output of the differential amplifier at zero current condition!
Is this a magnetization problem? Performing the demag nothing change.
Do we need a software calibration?
The image shows the schematic that we used in this application.
Many thanks.