4-20 mA to 0-10 V Circuit Design (Isolated)

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blacksnow

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How can i design a 4-20 mA to 0-10 Volts Circuit? (I don't want to convert it to 0-5V or 0-10V using 250 or 500 Ohm resistor)

Can i do it by converting 4-20 mA to some voltage signal using operational amplifier e.g. 2 to 12 Volt and then convert it to 0-10 V using Comparator circuit?

Assume 4 to 20 mA X k = 2 to 12 Volts (where k is the gain of opamp)

and then 2 to 12 Volts - 2 = 0 to 10 Volts. (Using Comparator)

If i am right then please suggest some suitable opamp IC for amplifier and comparator.

And if not then please suggest some other solution.

Thanks
 

A compatator is used to decide if a voltage is above or below a reference voltage, it has a bistable output, high or low. I'm assuming you are looking for a linear output so you'll need to use an opamp with an offset applied. Check out this thread https://www.edaboard.com/threads/1203/

Ray
 
I use IL300, it's linear optocoupler. So, you can make it isolated with just a few components.

See:


You can find 4-5 different application manuals by google with examples how to do it.

Mr.Cube
 
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