Hi
I have to design a 4-20 mA transmitter circuit for a load cell with 520ohm impedance.
I used XTR106 and circuit that mentioned in figure 5 of XTR106 datasheet.
but i don't have any Vref voltag for supplying my sensor means the voltage is zero so my current is zero too. (Vreg is zero too)
my circuit is:
I don't know what is the problem. maybe the the XTR106 was damaged but all 5 ICs that i bought had a same result.
I would be thankful if someone could help me...