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15kV ESD Op-Amp?

Audi McAvoy
Prodigy 70 points

I need to clean up a 5V TTL input signal with a Schmitt trigger device/circuit.  The Schmitt trigger device/circuit needs to withstand 1kV for several seconds.  I am unaware of any conventional logic family that can take this kind of punishment, so a 74x14 device seems an unlikely solution.

I am aware that some other companies offer input isolation devices that are marketed as "Schmitt trigger," but a close inspection of the datasheet (an a conversation with their FAE) shows that this is just barely a true statement (and not true enough for our needs).

I'm considering an op-amp based Schmitt trigger circuit.  Does TI have anything that might fill this need?

  • 0
    Guru 21975 points

    Audi,

    I'm not aware of any of our op amps meeting a 15kV ESD rating. Keep in mind that these ratings are a measure of ESD tolerance of bare parts during handling and assembly. Performance on a circuit board is generally much better. With additional measures, including added protection devices, inputs can be made quite robust. This is true for logic devices as well as op amps. See this blog for some background...

    ESD… Zapp!  protecting circuits and systems from damage and functional failures

    Regards, Bruce.