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INA220: about INA220 IN-

Vera Mao
Expert 5065 points
Part Number: INA220

Hi dear supporting team,

customer is using below circuit for INA220, Is it ok? (should IN- always connect to same level with GND pin?)

  • 0
    TI__Mastermind 31880 points

    Hi Vera,

    I can’t tell if the circuit is OK without knowing what each of the pin voltages are. Could you note parameters such as “IF-48V”, “IF-48VGND”, VS and so on?

    Alternatively you may go through the exercise on your own based on below table. As long as these max specs are not violated, it is OK.

    The answer is “NO” to your second question - “should IN- always connect to same level with GND pin?” Because IN- can be anywhere in the range of -0.3V to 26V relative to GND pin.

    Regards, Guang

  • 0 in reply to Guang Zhou
    TI__Mastermind 31880 points

    Hi Vera,

    Since we haven’t heard back from you for a while, your issue might have been resolved. If not please post back.

    Regards, Guang