The circuit is like this:
The Rshunt of AD8479 is 100K，when I don't apply direct voltage to the resistor,supply electricity to AD8479, decoupled AD8479 well with two 0.1uF capicators,
the output signal is like this:
and when I apply direct voltage(22.6V) to the resistor,and AD8479 is powered on, the output signal is like this:
it seems the output voltage is a direct voltage plus a ripple voltage,but the direct voltage is what it should only has, what causes this problem？
Thank you for any suggestions from you!