I'm feeding 5V from an arduino to the circuit. I'm comparing the voltages across 2 trimpots. I use 4K7 as a pullup resistor. I measure 2.5V at the Positive Input (Pin 10) and 2.503V at the Negative Input (Pin 9).The Output (Pin 16) reads HIGH, but it should read LOW, since 2.5<2.503Only at 2.508 is the switch happening, and the Ouput isn't a steady LOW but it's fluctuating, I guess because of noise. At 2.509V and above it is steadily LOW.Is this behavior normal for a LM339 ? Meaning, is there always a delta?