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!
