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LMV393: Fail Analysis (FMEA)

Joe Gleason
Prodigy 100 points
Part Number: LMV393

Hello expert,

Wondering what happens if IN- or IN+ are left floating? It doesn't appear like they internally pulled up/down. What would the output go to?

Thanks,

Joe  

  • +1
    TI__Mastermind 49906 points

    Hello Joe,

    Bias currents flow OUT the inputs towards V- (GND), so there is an equivalent very "soft" pull-up of a few nA. The outputs would tend to float ~800mV below V+.

    So there is NO assumption that the output would be in a particular state (I assume that is your next question). So the output state would be concidered random under that condition.