[sdiy] voltage reference advice

[Harry Bissell]

5.1 volt zeners are close to zero temperature coefficient. I use them on each module
to power the front panel controls, so there can be no interaction from using the power
supply rails for this purpose. I find them to be good enough, I don't use better regs unless
I need them.

H^) harry


----- Original Message -----
From: Mike Beauchamp <mikebeauchamp at gmail.com>
To: sdiy DIY <synth-diy at dropmix.xs4all.nl>
Sent: Thu, 24 Feb 2011 12:33:54 -0500 (EST)
Subject: [sdiy] voltage reference advice

I'm building 4 VCO's in a single unit and I don't want to use the rail
voltages for the tuning knobs, octave switches and a few other things
(low current stuff).

I know I can use a Zener diode as a simple zener regulator
(http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/zenereg.html#c2),
but I don't know how noisy and stable that is going to be for this
application. I was looking at the LM431 which looks good.. There's
also the REF02 for a fixed +5V. Does anybody have any preferences for
voltage references?

-- 
[mike]
_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy

-- 
Harry Bissell & Nora Abdullah 4eva