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Forum Post: DAC161S997: Doubts in the 4 to 20 mA current loop transmitter reference design - TIDUAM6

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Part Number: DAC161S997 Hi Team. Please address the following questions:- 1. I referred "4-20 mA current loop transmitter reference design - TIDUAM6". Refer page 16,17/27 of the document. Equation 6 in the description below says Iout = Iin + Ir21 + Ir22 whereas I believe it has to be Iout = Iin = Ir21 + Ir22. Please do explain if something is wrong at my end. 2. Can you please elaborate me the description below figure 12 of the document. How 2.5 V came out as a reference value and why not some other value ? Regards.

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