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Op-Amp/Comparator Application Note - Rohm

1/51 Application Note 2011 ROHM Co., Ltd. 64AN070E 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 range .. 8 Power dissipation (total dissipation) .. 9 3 Electrical Characteristics .. 10 Supply current .. 10 Input offset voltage .. 12 Input bias current and input offset current .

2.4 Input current ... 3.14 Stability confirmation method (unity feedback circuit/voltage follower) ... op-amp, RO is the output resistor of the op-amp, R L is the load resistor, and AV is the amplification factor of the op-amp. The relation between …

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