>>I need better than 6v for the supply. My current choice is a
>>TS941/2/4 from ST, 1.2uA operating current. Was just wondering if
>>anyone else had other solutions.

> That's a significant constraint. Could you power the buffers from the
> ADC reference? Or a 1uA LDO?

The 1 uA LDO MIGHT be able to be a resistor alone, or a zener and resistor.
At 1 uA a zener will have a horrendously soft 'knee' but as long as
the max and min supply voltage it produces over all relevant parameter
variations are within spec it may not matter.
Example only: It may be that with temperature variations and a say 1.5
uA clamp current at 3V you get a zener supply that is guaranteed to
lie in the 3V to 6V range. If 3V - 6V Vdd is allowable and if Imax at
3V is <=3D 1.5 uA worst case it would work.

A high side switched divider may be able to use an N Channel  MOSFET
at the BOTTOM of the upper divider resistor so that you do not need to
provide a level translator for the high side gate.


           Russell
--=20
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