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V/I or I/V CONVERTER

V/I or I/V CONVERTER

V/I or I/V CONVERTER

(OP)
Dear People, i am looking for a good circuit to do a V/I converter, to get a 0-5 Voltios DC from a 4-20 mA. If you have any suggestion, please sent me any information about that.

RE: V/I or I/V CONVERTER

there are specific circuits that meet all the 4-20 requirements, but just running the current into a feedback op amp will generate  a voltage output.

TTFN

RE: V/I or I/V CONVERTER

Hint: 250 ohm resistor.

RE: V/I or I/V CONVERTER

A 250 ohm resistor won’t work for either 4mA or 20mA.
How about a schottky diode?

RE: V/I or I/V CONVERTER

Logbook,

4mA X 250 ohms = 1 volt
20mA X 250 ohm = 5 volts

Now to get 0-5 volts, first add -1 volts and then apply gain of 1.25.

See Art of Electronics or any good op amp text.

RE: V/I or I/V CONVERTER

Circuit1952,
        unfortunately I mis-read the requirement as 0.5V, not 0V to 5V. A schottky diode would have worked well for that!  Sorry :-(

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