Transcription of Introduction to comparators, their parameters and basic ...
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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).
(respectively V TRIP-) is the input differential voltage for which the output switches from low to high state (respectively high to low state). Measurement Input offset voltage and trip points can be measured using the circuit shown in Figure 10. The first DC source sets the power supply VCC and the second sets VICM, the common mode voltage.
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