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AD8228 offset issue.

Question asked by JasonChien on Mar 17, 2017
Latest reply on Jul 12, 2017 by Emman.A

Dear Sir:

                We used AD8228 for shunt current sense application. We have some confuse from AD8228 output offset. As below picture we tried to measure same current on different common mode voltage and it had different current offset , Would you kindly help us to find reason for this result? Below is our detailed conditions :

 

X axis:

1=100uA

2=200uA

3=500uA

4=1mA

5=10mA

6=20mA

7=100mA

8=200mA

9=500mA

 

Y axis: output offset

 

AD8228 conditions:

 

VS=7.5V

-VS=-5V

REF=2.5V

 

 

 

 

Best Regard

 

Jason

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