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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.
signal (blue) applied on IN+ and a 50 mV DC reference voltage (green) applied at IN-. The output signal (red) amplitude is 5 V. As can be seen, sometimes, the input signal exceeds the reference voltage though the output remains low. This is caused by the internal hysteresis voltage of the TS3011. Hysteresis is discussed in Section 4. Figure 3.
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