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AD8212 High Voltage Application Non-Linearity Problem

Question asked by ggocmen on Dec 2, 2016

Hi all,

I have a prototype circuit board to test AD8212 for 100V application. Circuit is shown below.

I apply Input DC voltage and draw DC current. When i changed the input DC voltage step by step, while drawing same DC current at output, I cannot obtain same sensor output voltage. Result table is shown below. 

 

Why the output voltage changes so much with my input voltage change? How can i solve?

 

Input Voltage (V)Output Current (A)Output Voltage(V) (At Vout Node)
300.9850.466
700.9850.308
800.9850.268
900.9850.227
950.9850.179

 

 

ad8212 current sensing current amplifier

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