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LM2904: what's the current capacity of ESD diode in LM2904DGKR?

Max Han
Intellectual 2260 points
Part Number: LM2904

Hi

in my customer application, they see a negative voltage on IN+ and IN-, so customer want to check what's the current capacity of ESD diode in LM2904DGKR?

customer will improve their layout to attenuate this negative voltage.

thanks.

  • Former Member
    0 Former Member

    Hello Max,

    As a general rule of thumb, the limit will be about 10 mA.  To avoid coming too close to this maximum, we usually suggest limiting the input current to 1 mA.  The datasheet seems to suggest the same 1 mA limit.

    Regards,

    Daniel

  • 0
    TI__Guru**** 165226 points
    Max,

    In LM2904, there are no diodes from IN to V+; there is no "power Supply ESD Cell".
    The general rule for op amps is that -10mA is not harmful. -1mA is recommended maximum for sustained or repeated input current.
    During the negative input current time, the output may not be correct, (inversion aka phase reversal).