[sdiy] AS3394E: Practical power supply?

[Mike Bryant]

Uh ?   A decent SMPS has far less noise on the output than most linear supplies, and all well out of audio band.


-----Original Message-----
From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of Ben Stuyts
Sent: 18 November 2021 15:11
To: Benjamin Tremblay
Cc: SYNTH DIY
Subject: Re: [sdiy] AS3394E: Practical power supply?

Hi Ben,

A quick glance of the datasheet warns about jitter and stability affected by both the pos and neg rails. So I would def. not use any smps for this. A pair of LM317 / LM337 would do fine of course.

(Other) Ben


> On 18 Nov 2021, at 15:09, Benjamin Tremblay via Synth-diy <synth-diy at synth-diy.org> wrote:
> 
> Greetings,
> 
> I have been intrigued by the CEM3394 for a long time. I realize it’s the part of the Sequential Six Trak I like; the rest of the Six Trak leaves a lot to be desired.
> 
> What is a straightforward way to obtain the -6.5V negative supply? Use a 9V regulator and drop it with diodes? Use an adjustable switching supply? Add a feedback loop to a regulator? I’m assuming even a gaggle of 3394 chips won’t consume much current on the negative side.
> 
> I’m lazy (working 2 jobs and taking care of 2 kids and a puppy) and I won’t get much done unless I can breadboard the chip and try out some s/h ideas.
> 
> Thanks,
> Ben
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