I am designing a peak detector to give the output voltage to an analog input of the Arduino DUE (runs the pins at 3.3V). Looking at the circuit, the first diode is a Schottky model with which I practically eliminate the negative part of the signal. The thing is that after that, according to the layout of the amplifier and the output diode, it should work as a peak detector circuit. The problem is that feeding the amplifier between 5V and ground works correctly as you can see in the image, but I would need it to work with a power supply between 3.3V and ground like other amplifiers I have in the circuit. The model of the amplifier is the LMH6618MA which according to the datasheet allows to work at that small voltage.
I think the problem is because the input voltage is 2V and the power supply voltage is 3.3V and because it is so close, that's why it saturates (not like with 5V which works), but in principle it shouldn't be because of that, I understand. I attached the screenshots (in order) of the circuit, its simulation at 3.3V power supply, the voltages and currents at each point given by Orcad and the simulation at 5V so that you can see that the circuit works correctly at a higher voltage.
I would be very grateful for your help because I have been stuck with this for several days and I can't finish the PCB to order it :(
Sorry if my explication is bad, is not my mattern language and i don't controlled so much