At 09:20 AM 03/12/2010, you wrote:
>On 03-Dec-10 05:03, Forrest W Christian wrote:
> > I'm thinking there's a trick I'm missing somewhere.
> >
> > I'm trying to design a circuit which uses an ADC to measure 0-60V at
> > least to the nearest 0.1V.
>
>The easiest way would be to use MCP3421(MCP3425) delta-sigma converter
>which has internal 2.048V 5ppm reference and two low temperature
>coefficient resistors for the divider.

Well, except that it's not "5ppm" but rather +/-15ppm/=B0C "_typical_",
with NO maximum specified. If we are willing to gamble on a 3-sigma
distribution 99.7% of units should be within +/-45ppm/K.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the rewar=
d"
speff@interlog.com             Info for manufacturers: http://www.trexon.co=
m
Embedded software/hardware/analog  Info for designers:  http://www.speff.co=
m




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