LM339EDR2G

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Linear-Comparators

The LM339EDR2G is a comparator IC that belongs to a broad category of IC\'s known as linear-comparators (LinComp). As the name implies, lincomps are linear devices that compare two or more voltages against and to each other. They can be used to identify inequalities between two input voltages, as well as detect whether a voltage is rising or falling. The LM339EDR2G is a low power, 4-quadrant precision, open-drain, LM339 series device, offered in packages of 2 or 5 pins.

Application Field

As an open-drain device, the LM339EDR2G can also be used as a multiplexer or logic interface. This makes it applicable in various industries including automotive, consumer electronics, medical, telecommunications and industrial control. Its low power requirements make it a great choice for measuring and controlling applications that are battery operated. It can be used in the detection of the equality or inequality of two voltages, an indication of signals rising or falling, and the identity control of circuits interconnecting two different circuits.

Working Principle

The LM339EDR2G is designed as an OP-AMP based comparator that contains an amplifier stage with a gain of 1. The +ve and -ve pins of the IC are connected to the two input voltages that are to be compared against one-another. It is possible to use an external reference voltage to one of the inputs or a voltage divider. When the voltage on the +ve pin is greater than the voltage on the -ve pin, the output of the comparator IC is left open (or "high"), and when the voltage on the -ve pin is greater than the voltage on the +ve pin, the output is set to the ground. This output can be used for further amplification, triggering or as an input for other devices.

The LM339EDR2G is capable of operating over a wide range of temperatures, from -40 to 85 degree Celsius. It can also be used with supply voltages ranging from 3V to 36V DC. This makes it a great option for different applications requiring different voltages.

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