LM311PG4

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LM311PG4 Linear - Comparators

The LM311PG4 is a general purpose comparator with single supply operation and open collector outputs. It operates over a wide range of supply voltages and has a low power consumption. The LM311PG4 is a linear voltage comparator with an operating range of 0V to 15V and is capable of providing efficient and accurate results for applications such as precision voltage control, amplifiers, and optical isolators.

Application Field

The LM311PG4 is designed for a variety of applications in different fields, including medical equipment, automotive, industrial, consumer electronics, as well as consumer and industrial lighting. The LM311PG4 can be used for various functions, such as comparison and voltage threshold detection. In consumer products, it can be used for temperature and humidity sensing, motor and fan control, battery management, and other applications. In automotive, it can be used for engine control and performance monitoring, electronic throttle control, and speed and acceleration sensors. Furthermore, the LM311PG4 can be used in industrial systems such as temperature and level sensors, motion sensing, PLC (programmable logic controller) monitoring, and voltage monitors.

Working Principle

The LM311PG4 is a rail to rail CMOS linear comparator with added features. It has two internally regulated voltage comparator set points (Vrefs) and two input channels for differential input signals. The differential input stage converts the differential input signals into a single, unipolar voltage level. The voltage level is compared to the internally set Vrefs. The voltage level either high, low, or at the same level of the Vref. These levels are then transformed into logic level outputs. The output logic level is determined by the magnitudes of the differential input signals and the internally set voltage reference level.

The upper and lower voltage comparator set points (Vrefs) are internally adjustable and can be changed and tuned to match the desired output logic level. The input common-mode voltage of the LM311PG4 can range from 0V to 15V and the lower Vref range is from 0V to 14V and higher Vref up to 15V. This allows the comparator to be used with a wide range of input voltage levels.

The LM311PG4 is designed to provide a low power consumption (2.5 mW max) for a wide range of supply voltages, operating temperature range, and output current drive capabilities. The output can drive up to 30 mA with a 3V to 15V supply. The output is short circuit protected and the output state is protected against transients. The outputs can be pulled low or sink current. The output of the LM311PG4 will remain in its logic state until next measurement.

In summary, the LM311PG4 is a robust, low power consumption, wide range of supply voltage and temperature capable voltage comparator with differential input channels. The LM311PG4 can provide accurate and reliable performance for a wide range of applications.

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