[sdiy] Re: LVM

[Tony Clark]

> 5V precision opamps, possibly R-R, supplied from +/-2.5V.

   One thing that needs to be addressed (since I design stuff that runs 
on R-to-R chips) is that you DON'T get the full scale swing.  In order to 
do a proper 0-5V in/out scheme, you should have a little headroom on 
that.  So I'd plan on making stuff that runs from 0-6V or something like 
that.  You can get near 0, but you still can't get right to the positive 
rail.
   OTOH, most chips for single-supply will run up to 5.5V-7V, so that 
should be good enough.
   And if it were me, I'd run it straight from 5V, not bipolar, and use a 
very good clean 2.5V reference for mid-biasing circuits.

   Just my comments on the topic.  :)

   Tony

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