At 11:36 2/07/97 GMT+200, you 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
>

Hello Hennie,

How about one resistor. V=I*R

50 ohms -> 1 volt full scale reading with 20 mA input.

Regards,

Ross McKenzie
Melbourne Australia