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Linear - Comparators

The LMH7220MGX/NOPB is a member of the latest generation of wide common-mode range, low-voltage differential signalling (LVDS) comparators. It was designed to provide superior performance in the presence of noise, high-speed operation, low current consumption and high input impedance. The device provides differential input voltage range in excess of 350 mV, a maximum differential sensitivity of -70 mV, and an output rise time response of 0.4 nS. The output voltage swing is well within the full adapter differential range, meaning that it can be implemented across a wide range of supply voltages. Additionally, the LMH7220MGX/NOPB provides protection against EMI and spikes, as well as superior immunity against ground loops and power supply noise. The device is designed to be used in a variety of applications, including in-line voltage comparison for AC and DC power supplies, motor control, LVDS communication, and analog to digital converters.

The operation of the LMH7220MGX/NOPB comparator is based on its operation of its input stage, which contains a pair of complementary metal-oxide semiconductor (CMOS) differential pairs. The differential pairs provide high input voltage common-mode range, while rejecting noise. The input differential amplifiers allow signals to pass without any distortion. The differential input stage also includes a bipolar current source, which ensures a constant operating level of the incoming signals. This ensures a consistent and reliable performance under varying conditions. Furthermore, the low-voltage design allows operation of the comparator at supply voltages as low as 1.8 V.

The output stage of the LMH7220MGX/NOPB comparator is designed to provide low power consumption, high output voltage swing and reduced voltage drops. The output stage features a built-in open drain, which is used to drive the output to a high or low logic level. This feature enables the implementation of low-voltage open-drain buffers for better power economy. The output stage also features a PWM-invertional driver, which provides improved noise immunity and edge rates.

In summary, the LMH7220MGX/NOPB comparator is a highly advanced and versatile device. It provides a wide range of differential input voltage range, low power consumption and high output voltage swing. It is ideal for in-line voltage comparison for AC and DC power supplies, motor control and other low voltage applications. Furthermore, its low-voltage design enables operation at low supply voltages, while its PWM-invertional driver and open drain provide superior noise immunity and edge rates.

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