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TLV3702 Comparator: input > Vcc ?

Discussion in 'Electronic Basics' started by Hammy, Apr 12, 2008.

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  1. Hammy

    Hammy Guest

    Am I reading the datasheet to the TLV3702? It says that the input
    voltages can exceed the rail voltage? Here is the datasheet.

    http://focus.ti.com/lit/ds/symlink/tlv3702-q1.pdf

    If that is the case does anyone know of any other comparators that are
    capable of this and can operate off a single supply upto 12v?
    Preferably cheaper:).I've been wading through Digikey and that's the
    only one I can find.

    I know it's slow but I don't need nanosecond transitions uS are good
    enough.
     
  2. gearhead

    gearhead Guest


    Linear makes the LT1716, inputs can go to 44 v regardless of supply,
    according to the datasheet.
    Looks like it costs a little more than the TI comparator.
    I cross-posted this to some other newsgroups in hopes of hearing of
    other high-side comparators. I didn't know about the TLV370x until I
    saw your post. That's a real micropower chip. Take a look at the
    graphs for output. You really don't want to put much of a load on it.

    You also have the option of using a high-side op amp as a comparator,
    especially since you don't need nanosecond response times. FET op
    amps like the TL08x are very common and fairly cheap. You can even
    get them with nulling pins.
     
  3. gearhead

    gearhead Guest

    And LT6700 common mode goes to 18v regardless of supply.
     
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