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How to build an isolated loop powered 4-20mA transmitter

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loop powered circuit

Hi
Please explain how to design a loop powered isolated 4-20mA transmitter? How to build the isolated dc/dc conveter with max 4mA?

Best Regards
 

how to build 4 to 20ma circuit

Take a look at XTR101: **broken link removed**
There you will find examples on how to use it and one additional example on 4-20mA isolated circuit is added below ..
Regards,
IanP
 

loop powered circuits

The above circuit is non isolated transmitter(loop powered),How to design an isolated one?
 

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