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LM2903 current at input pin

Calum Mackinnon
Genius 4155 points
Other Parts Discussed in Thread: LMC7221, LM2903

Hi,

I'm hoping you can tell me the max current I can feed into the input pins of the LM2903? The LMC7221 for example states that +-5mA is teh max but there is nothing defined for teh LM2903.

 

Cheers

Calum

  • 0
    TI__Guru**** 165746 points

    Calum.

    The LM2903 input blocks input current flow up to 30V, so there is no positive (in to DUT) input current.
    If the input(s) go below ground current can flow. The "general rule" of -10mA is certainly safe for the LM2903.
    However, the output state may invert (wrong output) if the inputs go below ground.

    Regards,
    Ron Michallick