I to V converter description

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#1 21661239 18 Feb 2012 03:42

Gundappa Patil Gundappa Patil

Anonymous

Post #1
21661239 18 Feb 2012 03:42

hello i want to know the current to voltage converter circuit and its explanations how it will converts using LM324 or LM358.
please give me the circuit.

the current will be 4-20mA and ouput voltage will be 0-10Vdc.
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#2 21661240 18 Feb 2012 12:04

Steve Lawson Steve Lawson

Anonymous

Post #2
21661240 18 Feb 2012 12:04

Check out Figures 1 - 3 (attached). You might want to add capacitors to the LM317 circuit as appropriate to voltage source (as applied to the LM317. And to the output of the LM317 if the signal has any high frequency components (for better transient response).

If 2 - 10volt is satisfactory, then it's even simpler--a 500ohm resistor will do the trick [where is says 250ohm, think 500ohm ;]:

* http://www.bapihvac.com/CatalogPDFs/I_App_Notes/Understanding_Current_Loops.pdf
* http://www.pacontrol.com/download/4-20mA-Current-Loop-Primer.pdf

Other possibilities:
* http://www.vishay.com/docs/83710/appn54.pdf

Ready made:
* http://www.eidusa.com/Interface_Boards_Current_to_voltage.htm
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