[sdiy] DG413 question

[Don Tillman]

   > From: "JH." <jhaible at debitel.net>
   > Date: Wed, 31 Jan 2007 22:10:19 +0100
   > 
   > If I don't want to make use of the DG413's level shift
   > capabilities, I can do the following, can't I ?
   > 
   > Connect GND and V- pins both to -15V, and
   > connect VL and V+ pins both to +15V
   > 
   > and control the logic inputs with -15V = Low and +15V = high

Hey JH,

I believe you can... however...

I found out the hard way that a wide control voltage input swing
places large charge injection spikes on the signal, at least on all
the DG409's I tried.  So my QuadTrapVCO uses extra zeners to bring the
control voltage down to 3.3 V.

  -- Don

-- 
Don Tillman
Palo Alto, California
don at till.com
http://www.till.com