LM311DE4

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The LM311DE4 is a high-performance, low-cost, monolithic integrated circuit consisting of two independent comparators designed specifically to operate from a single power supply over a wide range of voltages. The LM311DE4 is used in many fields requiring comparisons between two variable signals. Its high voltage gain and low power consumption provide a wide range of applications and make it suitable for use in a variety of comparative circuits in consumer electronics, test and measurement instruments, or industrial control circuits. The LM311DE4 is a linear - Comparator. It has two main functions, one is input-output (IO) and the other is output-output (OO) comparators.

The LM311DE4 starts with two independent differential amplifiers operating from a single power supply across a large input voltage range of 1.5V to 36V. It has a wide bandwidth and low offset voltage. The two inputs are internally matched to reduce errors brought by common mode input signals. The advantages of low offset make it suitable for many applications. The wide input common mode voltage range makes it possible to extend the dynamic range of the output, which provides high resolution. The outputs are open collector and can be loaded with up to 5mA.

In IO mode (the "-I" pin is connected to the "0V" pin), the LM311DE4 starts to compare the input voltages of the two pins "-I" and "+I" which represent the upper and the lower limit. The output reflects the relation between those voltages, so that using proper logic, the function of the device can be extended to an observation of multiple conditions. This is a very advantageous feature of the LM311DE4.

OO mode is used when the "+TP" and "-TP" pins are connected together. This mode can be used to compare two different reference voltages. The output probability depends on the voltage value of the reference voltages, thus providing a wide range of comparison and consequent functions.

In summary, the LM311DE4 is a low-cost, simple-operation, high-performance monolithic integrated circuit consisting of two independent comparators, very suitable for use in linear applications. Because of its wide input voltage range and its high gain, the LM311DE4 can be employed in many kinds of comparative circuits, from consumer electronics to test and measurement instruments as well as industrial control circuits.

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