1. Op Amp Performance In Comparator Applications Neil P. Albaugh May, 2000 May, 2000

2. 2 Characteristics: op amp comparator Closed loop stability logic output inverting & non-inv speed precision wide differential input voltage range open collector out Yesno no *yesyes noyes yesno yes *yes noyes * * check !

14. Sometimes slower is better Lower output slew rate means less radiated emi & rfi smaller power supply current glitch

17. Bad op amps for comparators Diode- clamped differential input types Opa227 & opa228 opa277 opa177 & opa77 opa27 & opa37 others ???

18. Caution can input voltage exist when supplies are off ? If so, add resistors in series with inputs to limit current to about 10 milliamps or less