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INA240: Initial output value

Eric Ao
Prodigy 10 points
Part Number: INA240
Other Parts Discussed in Thread: TINA-TI

Hi, We are using this amplifier INA240A1 in a current sensing application and connecting both REF to GND. We started the PSPICE simulation with the test circuit, sbombe4, downloaded from TI website. However, the output voltage always starts with 2.5V. Is that real? Thank you very much for your help!

Best regards,

Eric

 

  • 0
    TI__Mastermind 34250 points

    Hi Eric,

    No, the behavior is not real, in reality the device doesn’t start from mid-supply. The model probably needs to be adjusted to match the device.

    I verified with TINA-TI, where the TINA model works correctly when the “calculate operating point” option is enabled.

    Regards, Guang