Re: 3.3v robustness

On Thu, 13 Nov 2008 07:26:54 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@xxxxxxxxxxxxxxx> wrote:


On Tue, 11 Nov 2008 06:32:54 -0800, JosephKK <quiettechblue@xxxxxxxxx>
wrote:

[snip]
CMRR
does degrade as the common mode voltage approaches the rails.


Maybe with the OpAmp you are using, but not universally.

Why do so many "engineers" have preconceived notions ?:-)

...Jim Thompson

It has been an issue with every opamp that i have ever used. If you
have made some that do not have that problem, send me the data ***
and some samples. It will enlighten me. Just because i have not seen
one or heard of one does not mean that they cannot exist, but that
they are outside my experience. And i have seen testing of opamps
where this not supposed to be a problem, but it still is.

.

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