Transcription of Operational amplifier, Comparator (Tutorial)
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Operational amplifier, Comparator (Tutorial)
1/51 Application Note 2011 ROHM Co., Ltd. Op-Amp/ Comparator Application Note Operational amplifier , Comparator (Tutorial) This application note explains the general terms and basic techniques that are necessary for configuring application circuits with op-amps and comparators. Refer to this note for guidance when using op-amps and comparators. a Contents 1 What Is Op-Amp/ Comparator ? .. 2 What is op-amp? .. 2 What is Comparator ? .. 3 Internal circuit configuration of op-amp/ Comparator .. 4 2 Absolute Maximum Rating .. 5 Power supply voltage/operating range of power supply voltage .. 5 Differential input voltage .. 6 Input common-mode voltage .. 7 Input current .. 8 Operating temperature range .. 8 Maximum junction temperature, storage temperature 8 Power dissipation (total dissipation).. 9 3 Electrical Characteristics .. 10 Supply current .. 10 Input offset voltage .. 12 Input bias current and input offset current .. 16 Input common-mode voltage 18 Maximum output voltage (High/Low level output voltage.)
potential → High level output. When the -input terminal potential > the + input terminal potential → Low level output. The major difference between op-amps and comparators is whether or not the phase compensation capacitance exists. Since op-amps configure and utilize a negative feedback circuit, they require phase compensation capacitance to
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