Thanks for all your input about the ADC resolution question.  It was very
educational!  It helps me to remember how much there really is to learn out
there!

However, I now have a more technical question.  I have a 12 V marine battery
and I need to get +/- 5 V from it.  I need very clean power, since the
amplifier
this is intended to power is VERY sensitive (> 5 mV of ripple causes it to
go
haywire).

I've tried using an LMC7660 from National, but it seems too dirty to use.
Does anyone have any "pet" products they use which take +12 V and
produce -5V?  Or +5V and produce -5V?

Mike H.

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