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AD8228 output swing

Question asked by JasonChien on Dec 21, 2016
Latest reply on Dec 22, 2016 by JasonChien

Dear Sir:

               I used AD8228 to measure shunt current and used AD8253 to measure voltage as below circuit , We have a issue that when we tie +IN and -IN to GND  then Vout will measure 5.7V swing. When we remove AD8253 then AD8228 Vout=2.5V(Normal). What's wrong for this circuit ? Do you have any suggestion? Below is detailed condition for your reference.

 

Best Regards

Jason

 

AD8228:

              +VS=7.5V

                REF=2.5V

               -VS=-5V

 

AD8253:

               +VS=7.5V

                REF=2.5V

               -VS=-GND

               A0/A1=GND

               WR=-5V

               

    

 

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