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<p>I'm also curious why REF03 - that's the 2.5V one, whereas the
REF01 would be a 10V ref.<br>
I know many use the REF02 (5V) in euro (is 10V ref ok on +/-12V
euro setups?)<br>
</p>
<p> I use the 10V LM4040 for references & pots for manual
control - I like that value as it gives 10oct at 1V/oct, a good
sort of range. <br>
I find it makes resistor values streamline nicely too.</p>
<p>Personally I never really tried AD parts, though note their
strong lineage.<br>
LM4040s are available in a good range of voltages, accuracies
& temp. stability values.<br>
</p>
<div class="moz-cite-prefix">On 28/03/2021 21:14, Pete Hartman
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CACodTR9vdQra8ZTRjJooH=LnLAx4amPBc3+EaA+KSde8VEQtWA@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">What's wrong with the cheaper LM4040's?<br>
<br>
e.g. <a
href="https://www.mouser.com/ProductDetail/Diodes-Incorporated/LM4040B25FTA?qs=GWgl%252BsiMZr%2F%252BaZ%252BmKrTIBg%3D%3D"
moz-do-not-send="true">https://www.mouser.com/ProductDetail/Diodes-Incorporated/LM4040B25FTA?qs=GWgl%252BsiMZr%2F%252BaZ%252BmKrTIBg%3D%3D</a></div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sun, Mar 28, 2021 at 3:09
PM cheater cheater <<a
href="mailto:cheater00social@gmail.com"
moz-do-not-send="true">cheater00social@gmail.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">You
want a REF03 voltage reference from AD. That's the easiest and<br>
best way of doing this.<br>
<br>
On Sun, Mar 28, 2021 at 9:42 PM Neil Harper <<a
href="mailto:metadata@gmx.com" target="_blank"
moz-do-not-send="true">metadata@gmx.com</a>> wrote:<br>
><br>
> so now that I have my own little VCO going on the
breadboard, i want to<br>
> do a perfboard module with it for my system. so now I'm
thinking about<br>
> how this VCO will remain stable in a system where the
rails might be<br>
> fluctuating.<br>
><br>
> the first issue i see is that my LM311 comparator takes a
reference<br>
> voltage drawn from my +15V rail through a resistor to set
the trip<br>
> point. if that +15V waivers, so will my trip point.. and
so will my<br>
> frequency. so should things like that be derived from an
onboard<br>
> reference instead? is this common practice?<br>
><br>
> I see in schematics like the ENS-76 VCO (<br>
> <a href="http://www.synthsource.com/ens76/vcofig6.jpg"
rel="noreferrer" target="_blank" moz-do-not-send="true">http://www.synthsource.com/ens76/vcofig6.jpg</a>
) that the comparator<br>
> reference is just taken from the rail (through R13, R14
divider). Same<br>
> with Thomas Henry's VCO-1's, lots of references right off
the rails.<br>
><br>
><br>
><br>
><br>
> --<br>
> /// Neil Harper<br>
> /// Every Wave is New Until it Breaks<br>
><br>
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