Graham, I would never supply an analogue circuit from a dc-dc converter.
You'll never be able to supress the noise efficiently. For an analogic
power design the result will be unpredictable.
For an AD conversion will be murder.

best, Vasile


On Mon, 18 Mar 2002, Graham North wrote:

> Hi all,
>
> I need a +/- 18 Volt supply to power some Analogue circuitry, but I am
> having difficulty finding DC to DC converters to generate the voltages
> from a 3.3 Volt supply.
>
> As this is going to supply Analogue circuitry the outputs need to be
> super clean, ultra low noise and well regulated. Oh and it would be
> great if it was really efficient too!
>
> Does anyone have any recommendations?
>
> Thanks alot,
>
> Graham North
>
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