I am using XTR-111 in one of our products, in order to get 4-20mA current output. It is working well.
Our product has provision for sourcing 4-20mA, and not sink. I want to know weather it is posible to provide 4-20mA sink capability with XTR-111.
If one of your products outputs 4-20mA, you may use the RCV420, a current loop receiver, which converts the current to a 0-5V voltage
thanks albert for your reply.
But I want to use XTR-111 such that it can sink 4-20 mA current instead of sourcing.
is it possible with XTR-111
Take a look at this thread, I think that for current sinking other products may be used:
Thanks for the help!
Before I go too much further I want to be sure you're not looking for a remote 2-wire transmitter to complement your XTR111 which is a 3-wire transmitter. If so, please look at the XTR115, XTR116, or XTR117. These are meant to be operated as remote 2-wire transmitters and operate as current sinks. If you are not designing a remote 2-wire loop powered product then do not use these parts, they do not work like the XTR111 and are meant for specific applications and you would know if you were designing one.
Then to get back to your original question, the XTR111 can not be used as a current sink. It is mean to source current. If I thought about it for awhile I'm sure there is a way to add a bunch of extra circuitry to make the XTR111 control a current sink but it would be much simpler just to build a discrete one out of a single transistor and op-amp. Please take a look at the following posts because there is a lot of information about current sources/ sinks.
Also, here is a wonderful application note from Burr-Brown on current sinks / sources.
Regards,Collin WellsPrecision Linear Applications
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