I require a high input impedance in one of my projects so I've added an OPAMP buffer with a fairly large resistor. The OPAMP is OPA4314 data sheet, product information and support | TI.com. I'm powering it from 5V for a brief period while taking measurements in order to preserve all the power I can. It has about 200ms before applying a voltage to its input. The voltages are usually DC.
All in all the circuit works as expected but I had noticed that when my hand is close to the IC there is voltage output on other channels of the quad OPAMP. What would be the most reasonable way to overcome this? Also, what could be the reason for this?