Hennie Swanepoel wrote:
>
> I am thinking of using a microcontroller (perhaps a PIC) in an industrial
>  project.
> The controller would have to interface with  0 to 20mA analogue input and
> output signals.  Does anybody know of an IC(s) that does current-to-voltage
> conversion and vica versa, perhaps with the use of one or two passive
> components?  I am looking for alternatives to using opamps.
>
> Any suggestions/comments/advice appreciated.
>
> Hennie Swanepoel

You probably mean 4mA to 20mA, don't you? A 250 ohm resistor gives you
1V to 5V.
Even though the 250 ohm is not standard E12, you can still get it in
very low
tolerances (0.1%).

--
Friendly Regards

Tjaart van der Walt
mailto:tjaart@wasp.co.za
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