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INA237: Ground Issue

Naman Garg
Prodigy 20 points
Part Number: INA237

Hello team,

Did we use the same ground for Vbus (48V) and Vs (3.3V)?

Detail:  VBUS 48V supply is made using Ground (GNDISO) and VS supply 3.3V with ground (GND). And IN+, IN- is connected with power rails of 48V. 

So, did INA237 is working with the above topology? Or, I will sort the ground internally.

  • 0
    TI__Mastermind 22065 points

    Hello Naman,

    Thank you for using the TI forum. The INA237 only has one pin for GND, so both the VBUS and VS pins need to be at a voltage with respect to that ground.  If the VBUS 48V GND is different, then the INA will not know the correct voltage, as voltages are a potential difference between two points.