[sdiy] Re: LVM

[john mahoney]

Great input, Tony. Thanks for weighing in.
--
john


----- Original Message ----- 
From: "Tony Clark" <clark at andrews.edu>
To: "Synth-DIY" <synth-diy at dropmix.xs4all.nl>
Sent: Tuesday, November 16, 2004 11:34 AM
Subject: [sdiy] Re: LVM


> > 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
>