I need to control a device with a 0-1V input that supplies at least 200 mA of current (500 mA max).
Is there a way to ensure that the gain is actually reduced since I only want to go from 0 to 1 Volt.
I need maximum transmission hence have to make something that supplies plenty of current.
or use an opamp + a buffer.
I can't see what the op amp will be doing for you, the voltage is sufficient already.