> > Input : 40mv - 111mv Output : 1V
> > Input : 112mv - 214mv Output : 1.5V
> > (unspecified)
> > Input : 280mv - 400mv Output : 5.0V

> use an A/D with sufficient bits to get desired number output steps
> tied to D/A with same number of bits

Hi Robert, the steps Yigit has indicated above don't suggest a linear
relationship. If it isn't log either, then something with smarts is going
to have to translate

Yigit, can you detail the input ranges and voltage out for each please

You haven't said what 'quality' of output voltage (eg PWM ripple,
precision) you want and how quickly

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