I've been looking at some op-amp material and I have a question. The datasheet shows a Max value for the "Input Common Mode Voltage Range" spec of Vcc-2 over the full temperature range. Ron Mancini says that this parameter refers to the average voltage at the input pins. If I'm using a 5V Vcc and have one input biased at 2.5V when the other input exceeds about 3.5V aren't I exceeding the spec? IOW, it appears that it's not kosher to drive the other input past 3.5V (3.5V + 2.5V) / 2 =3V = Vcc-2
Am I understanding this? If so, any recommendations for a single supply comparator with a bigger common mode input range?