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Subject: Re: how to convert 4-20 ma to 0-5v with an op-amp

Date: 06/27/03 at 4:28 PM
Posted by: Jeffrey
E-mail: jeffreysliang@yahoo.com
Message Posted:

In Reply to: Re: how to convert 4-20 ma to 0-5v with an op-amp posted by JESUS on 03/10/03 at 3:40 PM:

Using current-to-voltage application of OPAMP:
Connect signal to -in of OPAMP, Ground to +in.
Connect 250-ohm resistor between OPAMP output to -in. The impedance to drive the measuring instrument is the Z-out of OPAMP. The output is -1V to -5V instead. You need another stage to convert to 0 to 5V, if it is necessary.
Note: This is theory only, no lab work done.


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