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XTR106: input voltage of XTR106 and design based on datasheet example

Prodigy 235 points

Replies: 12

Views: 735

Part Number: XTR106

Hi

I have to design a 4-20 mA transmitter circuit for a load cell with about 520ohm impedance.

I used XTR106 and circuit that mentioned in figure 5 of XTR106 datasheet.

so I used the circuit like figure 5 of datasheet

I think the input range of XTR106 have to be between 1.1 and 3.5V.

but in this example I think the characteristic value is about 4.0817 mV/V so the input full scale voltage is 0.245*4.0817*50=50 mV

so the full scale current is Io=(50*40/125)+4=20

in this example the input voltage of XTR106 is betwwen 0 and 50 mV is it OK?

for my application I have a load pin sensor with 

Rated load (FS): 80kN
Zero signal: -0.0009 mV / V
Characteristic value: 1.0147 mV / V

so I used this circuit for it

but for this circuit I have less than 4 mA at the first!

is my design ok? How I can solve my problem?

  • In reply to kai klaas69:

    Hi kai

    not by this values but with other values I removed the bias.

    I really thankful for your helpful responses.
  • In reply to Amir Poursadegh:

    Hi Amir,

    good to hear that you could solve the issue! :-)

    Kai

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