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do comparators go out-of-control at startup?

Discussion in 'Electronic Design' started by [email protected], Apr 23, 2007.

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  1. Guest

    i am using an LMC6772A and I need to make sure that the output does
    not go out-of-control during startup and go LOW for any length of
    time, i.e. while the supply voltage is less than 2.7V, the output
    needs to stay high (open drain). the inputs will always be + > -
    during startup.

    is there some way to figure out if this comparator is intrinsically
    designed to be open-drain during startup?
     
  2. Meat Plow

    Meat Plow Guest


    Spec/Data Sheet?
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  3. Joerg

    Joerg Guest

    If you have a very good SPICE file from the manufacturer you might be
    able to figure it out. However, if something can seriously break in case
    it doesn't comply I would do this with discretes. If your BOM budget
    allows (mine usually doesn't...) you could even use a fancy reset chip
    for uC, a pnp, some resistors etc.
     
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