As I recall, the datasheet lists limits on Vcc.  In my
application, I used a MAX882CP with a 1.5M and 1M (both 1%) voltage
divider in the feedback.  This drove both a PIC16c61 and an ISD4003.
This was battery powered with three AA cells in series along with a
1N5817 for reverse polarity detection.  The audio power amp (TPA7010) was
run off the regulator INPUT voltage while everything else was run off the
regulated +3V.

Harold


Harold Hallikainen
harold@hallikainen.com
Hallikainen & Friends, Inc.
See the FCC Rules at http://hallikainen.com/FccRules and comments filed
in LPFM proceeding at http://hallikainen.com/lpfm

On Thu, 5 Aug 1999 17:30:17 +1000 PJH <elek@NETSTRA.COM.AU> writes:
>PICers,
>
>I've been looking at the ISD 33000
>voice player chip. It's OK but
>needs a 3V supply & 3V regs are
>awkward to get ahold of. Anybody
>know how critical the 3V limit is?
>
>The data sheet is a bit obscure but
>there is a test cct shown operating
>on 3.3V. Just wondering if using 3
>diodes to drop the Vcc would be OK?
>It's just that Vcc then becomes a
>little uncertain for different
>diodes. Would that upset things?
>
>Thnax - PJH

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