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AD8009 to drive a variable capacitive load

Hello,

I would like to use the AD8009 to drive a variable capacitive load over a SMA cable.

According to the datasheet, I need to  "insert a resistor in series between the op amp output and the capacitor." It is required to "to prevent instability and improve settling time when driving a capacitor"


My circuit can be summarized like that :

My goal:

for some reason, I need to apply a constant voltage at the point “A”.

My issue:

According to the capacitor variation, the voltage at the point “A” will not be constant (voltage divider effect).

My question:

What do you recommend to avoid or limit the voltage divider effect?



Thank you!