<div><br></div><div dir="auto">REF01/02/03 are listed as “not recommended for new designs” on th AD site... EOL?</div><div dir="auto"><br><div class="gmail_quote" dir="auto"><div dir="ltr" class="gmail_attr">On Sun, Mar 28, 2021 at 5:48 PM cheater cheater via Synth-diy <<a href="mailto:synth-diy@synth-diy.org">synth-diy@synth-diy.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)">Sorry, I was thinking of REF01, the 10V one.<br>
<br>
Might as well use REF02 or REF03 depending on how you structure your signal.<br>
<br>
Is LM4040 just as good? I don't know. The last time we had a voltage<br>
reference megathread it was decided that REFxx is the best.<br>
<br>
On Sun, Mar 28, 2021 at 10:40 PM Tom Bugs <<a href="mailto:admin@bugbrand.co.uk" target="_blank">admin@bugbrand.co.uk</a>> wrote:<br>
><br>
> 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>
><br>
> 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.<br>
><br>
> 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>
><br>
> On 28/03/2021 21:14, Pete Hartman wrote:<br>
><br>
> 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" rel="noreferrer" target="_blank">https://www.mouser.com/ProductDetail/Diodes-Incorporated/LM4040B25FTA?qs=GWgl%252BsiMZr%2F%252BaZ%252BmKrTIBg%3D%3D</a><br>
><br>
> On Sun, Mar 28, 2021 at 3:09 PM cheater cheater <<a href="mailto:cheater00social@gmail.com" target="_blank">cheater00social@gmail.com</a>> wrote:<br>
>><br>
>> 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">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">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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