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NicMac  
#1 Posted : Tuesday, June 9, 2009 2:15:41 AM(UTC)
NicMac

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Hi Russ and Brian,
I possibly wish to try to use external supplies for AVCC (after cutting the appropriate traces). What current draw am I to expect?
Thanks,
Nic
Russ White  
#2 Posted : Tuesday, June 9, 2009 5:48:27 AM(UTC)
Russ White

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If you do it per the manual, then what you will be doing is just supplying the reference voltage. The current draw is minimal. A few ma.
NicMac  
#3 Posted : Tuesday, June 9, 2009 6:11:28 AM(UTC)
NicMac

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Thanks Russ, as usual just what I needed to know.
christensenleif@msn.com  
#4 Posted : Wednesday, June 10, 2009 4:29:15 AM(UTC)
christensenleif@msn.com

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how much is it to gain (sound-wise)by connecting separate power x-former with dedicated dual psu to ref.voltages on B32?
best
Leif
Russ White  
#5 Posted : Wednesday, June 10, 2009 4:40:55 AM(UTC)
Russ White

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None that I know of. :) I just added the capability so I could adjust the voltage level itself. By increasing to say 3.5V you get slightly better DNR and more output swing. :) By lowering it you get lower output etc.

You could do that very easily with a voltage divider and say 5V from some place :).

The ref line has a RC filter prior to the reg. That will still be in play even if you use an external ref.
christensenleif@msn.com  
#6 Posted : Wednesday, June 10, 2009 7:14:13 AM(UTC)
christensenleif@msn.com

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ok
thxs 4 swift reply....as always Applause
best
Leif
Norway
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