Comparator Ic. This ic has 4 independent operational amplifiers on a single chip. This a low power quad operational amplifier and it has high stability bandwidth which was designed to operate from a single power supply over a wide range of voltages.
The lm397 features an open collector output stage. Lm339 lm239 lm139 lm2901 quad differential comparators datasheet rev. The lm393 ic can be considered as the equivalent comparator version of the most popular lm358 op amp.
A comparator consists of a specialized high gain differential amplifier.
De signed for low input current most comparators are essentially voltage devices that interface with digital logic circuits. Meaning it includes 4 separate voltage comparators whose inputs and outputs are appropriately terminated via the respective external pins of the ic package as shown below. Just like any other comparator each comparator block has a couple of inputs and one output. While any op amp can be made to work as a voltage comparator the lm393 proves itself to be advantages by providing an open collector output making it suitable to drive loads.
