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Introduction to comparators, their parameters and basic ...
October 2012 Doc ID 022939 Rev 11/27AN4071 Application noteIntroduction to comparators , their parameters and basicapplicationsBy Radim SmatIntroductionAfter operational amplifiers (op amps), comparators are the most generally used analog, simple integrated amplifiers are well described in many publications and a lot of information can be found regarding the design and proper use of these devices. On the other hand, information concerning comparators is much harder to find as they are often considered as simple devices. This note explains the main parameters of comparators and their limitations from an application point of and TS334 micropower low-voltage rail-to-rail ID 022939 Rev 1 Contents1 Comparator substitution by an op amp .. 42 Comparator parameters .. 5 Comparator classification by major parameters .. 53 Datasheet parameters .. common mode voltage range - VICM .. offset voltage - VIO (VTRIP) .. and SVR .. gain .. delay .. 114 Hysteresis.
input stage. The power consumption is, in that case, obviously smaller and the device cost is lower. 3.2 Input offset voltage - VIO (VTRIP) The input offset voltage (VIO) can be defined as the differential input voltage to apply in order to be at the toggling level. Input offset voltage limits the resolution of comparators.
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