[sdiy] Alfa AS3350 power supply question

[David G Dixon]

Hey SDIY Team,
 
I just bought 100 AS3350 dual SVFs for a massive project.  The datasheet is
a bit strange.  In one place, it says that the supply can be from +/-3V to
+/-16V.  In another it says that the total supply voltage should not exceed
26V.  On the diagram, it says that the supplies can be +3 to +12V and -3 to
-12V.
 
So, obviously, they are intended for +/-12V supplies.
 
My question is this:  What do you think would happen if I used my +/-15V
supply?  Would it a) work just fine, b) get too hot, or c) exploderate?
 
Of course, I'll try it out, but if it works fine and doesn't get hot, is
there some hidden catastrophe that will take me by surprise later?  The chip
basically contains four exponential sources and six OTAs.  I don't really
understand why it should be that sensitive to supply voltage.
 
In a related question, if I want to provide a +/-12V supply for the chip,
then what do you think about just dropping 15V to 12V and -12V through a
couple of opamps and using that as the supply for the chip?  Everything else
on the board is perfectly happy with the +/-15V supply.  Alternatively, I
could use 78L12 and 79L12, but I'd rather avoid that if I could.
 
Cheers,
Dave Dixon
 
 
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