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Sci.Electronics.Basics -> TLV3702 Comparator: input > Vcc ?
There are 3 messages in this thread.
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Author: HammyDate: 11:36 12-04-08
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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.
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Author: gearheadDate: 13:26 12-04-08
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On Apr 12, 8:36=A0am, Hammy <spa...@hotmail.com> wrote:
> 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.
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.
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Author: gearheadDate: 13:44 12-04-08
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On Apr 12, 10:26=A0am, gearhead <nos...@billburg.com> wrote:
> On Apr 12, 8:36=A0am, Hammy <spa...@hotmail.com> wrote:
>
> > 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.
>
> 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. =A0I didn't know about the TLV370x until I
> saw your post. =A0That's a real micropower chip. =A0Take a look at the
> graphs for output. =A0You 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. =A0FET op
> amps like the TL08x are very common and fairly cheap. =A0You can even
> get them with nulling pins.
And LT6700 common mode goes to 18v regardless of supply.
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