[sdiy] Seb's Fat Controller (was DAC via Mux)

[Neil Johnson]

Hi,

Justin Owen wrote: 

> http://burnit.co.uk/sdiy/index.php?page=fatcontroller
> 
> Thanks for this link Eric.
> 
> I'm not sure if Seb is reading this - but the one query I have about his S&H circuit is that there doesn't seem to be any switching/sampling part to it. The Paia Fatman S&H uses a 4016 switched by the micro but Seb's Mux output seems to go straight into the S&H cap/op amp combo.
> 
> Anyone care to explain that to me? Seb?
> 
> I'd happily ditch two 4016/4066s if I could...

You did read the datasheet for the MAX306 didn't you?  All explained there - note especially the EN pin.

Neil
--
http://www.njohnson.co.uk