Haven't read all of this thread yet, but have you checked Zetex parts? =20
IIRC ZXCT1082 or 1084 goes up to 60V, and can be powered from 3.3V. =20
They're not integrated with ADC etc, but very low cost (under $1 in=20
quantity IIRC).

Cheers,
-Neil



On 4/22/2012 8:01 PM, Forrest Christian wrote:
> Yeah, I had ran into the MAX9611/9612 myself.   It's one of those 'so
> close' type of options.   I actually really like the idea of the ADC
> integrated...  If it was even 5V more on the top end, I wouldn't be
> having this discussion...   It's just a bit too close for my comfort.
> It might actually be where I end up back at.
>
> Theres also a MAX9643 which is amplifier only which is sort of the
> similar situation.
>
> -forrest
>
> On 4/22/2012 8:44 AM, Mark Hanchey wrote:
>> On 4/22/2012 4:49 AM, Forrest Christian wrote:
>>> 1) I am unable to find any difference amplifier which runs at 3.3V and
>>> supports the necessary common mode range of 0 (-2 would be better) to
>>> 65V.   Some are close (the AD8207 for instance looks great until you
>>> realize the +65V is only at 5V).   I'm ok with one which has an
>>> integrated ADC as well...    I also am hoping for something which is a
>>> $1-$2 part, not a $5 part, since I use a lot of these on these boards.
>> The closest thing I could find is the Max9611.  It runs from at least
>> 2.7V and supports -.3v to 60V  and differential max of +-65V.   It is a
>> bit more than just an amplifier, it includes ADC and i2C interfaces but
>> the price doesn't seem too high, showing $2.68 at mouser qty 1.
>>
>> Hope you find something that works.
>> Mark Hanchey
>>
>>
>>
>>

--=20
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