Current to Voltage Conversion

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Joined Jun 26, 2013
Moderator edit:
This post was split from here:

i also trying to use RCV420 to convert 4 to 20ma to 0 to 5v. i have 4to20ma source which i will give to my circuit.
what i want to ask u that if internal resistor is provided then it is necessary to connect one more resistor? we can not give directly input to 1 and 3 pin?
in my circuit i have shorted the 2nd and 1st pin . i have given +input to 3rd pin if RCV420 and negative wore coming from source to 1+2 pin of rcv420.
10 and 12 pin is shorted.13pin is grounded.4pin =-15v and 16pin= +15v. output voltage taken from 14 pin w.r.t gnd.
Is it ok?
i get a output with 0.36v error.
i dont understand what i do with ref in,rcv com,rcv fb,pin and minimize this error?

thanks and regards
Last edited by a moderator:


Joined Nov 25, 2009
Hello swapnali,

The original thread you replied onto was 6 years old and the chances you would get a reply by the OP were slim, let alone that this is a new question.
Please create a new thread each time you want to ask a new question about a problem of your own.