I have get 600 LF353 from Mouser electronics.
I have used the LF353 to make a simple voltaje buffer (unitary gain or follower amplifier) for interfacing a sensor with electronics. The low bias current and high imput impedance makes this part an ideal one for this application. The LF353N does exactly what is supposed to, but it is adding an offset to the sensor signal.
The real issue I am having is not the offset itself, but the fact that the offset level changes from one part to another. It does not matter if it is on a PCB or a protoboard, using the same other components and changing just one LF353N to another one, the DC offset may change as much as 300 mV! We are working with Vcc = 5V
We shall produce over 1000 units, but we can not really trust on its behaviour because of that variable DC offset. Would it be something I am missing on this basic design?