MAX972CPA+

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The MAX972CPA+ is a linear comparator from Maxim Integrated. It has a voltage comparator with a high input impedance, low output impedance, and low input bias current. The device also has an adjustable hysteresis, a push-pull output, and is available in a wide temperature range. It has an independent enable for both channels, protection against input over-voltage, and is ideal for applications like motor control, speed sensing, and current sensing.

The comparison of two input voltages is the basis of linear comparators. The output waveform of a comparator depends upon the difference between the two input signals. Linear-comparators are usually based on a differential amplifier configuration with two inputs, an amplifier and a Schmitt trigger output. The differential input signals can be either the same type (barely above an equal reference voltage) or of a different type (barely above a different reference voltage for each): so-called hysteresis comparators.

The working principle of the MAX972CPA+ is quite simple: It acts as an amplifier with a gain of one, i.e. it amplifies the difference between the input signals, and controls the output according to the over or undervoltage conditions obtained by comparing the inputs. It then sends out a signal to the load depending on the input voltage range. This signal can be in the form of a logic high or low, or in the form of a pulse train or similar.

The MAX972CPA+ is typically used in motor control, speed sensing, and current sensing applications. It can also be used for AC line sensing, for controlling an output as per a programmed input, for automation/remote systems, for controlling the electrical parameters of a given process and for safety device applications. The device\'s independent enable for both channels, and protection against input over-voltage makes it ideal for high-reliability and demanding applications.

The MAX972CPA+ is a monolithic linear-comparator, ideal for applications that require low power dissipation, high input impedance, low output impedance, and no external components. It is a highly efficient device and is available in wide temperature range. With its adjustable hysteresis and push-pull output, the MAX972CPA+ is certainly an efficient choice when it comes to motor control, speed sensing, and current sensing.

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