LMH7220MKX

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The LMH7220MKX is a type of linear comparator, used for a variety of applications. A linear-comparator works to bring about a change in state between either two logical states or two voltage levels. This is achieved by comparing two signals and generating one output based on the comparison. The LMH7220MKX is a dual comparator, which outputs two signals based on two inputs.

The device is commonly used in a number of applications. In data acquisition systems, the device is utilized to convert a number of analog signals into digital data. It is also commonly used in analog-to-digital converters, as part of microcontrollers and in various control applications. The comparator has a very low power consumption, making it ideal for portable and battery-powered applications, as well as applications where power consumption needs to be maximised. The high common mode rejection ratio helps to ensure that false data is not outputted in noisy environments.

The LMH7220MKX operates by comparing both inputs to one another. If the voltage at one of the inputs is greater than the voltage at the other, then the output is set to a ‘high’ (1) state, indicating a positive comparison between the two. Conversely, if the voltage at one of the inputs is lower than the voltage at the other, then the output is set to a ‘low’ (0) state, indicating a negative comparison between the two. This process is repeated for each pair of inputs, allowing for a dual comparison to be carried out.

The device is powered by a single supply voltage of between 2V and 36V. The input signals can be sourced from either a single ended or differential connection, with the input common mode range extending from -2V below the ground reference to within 1.25V of the supply voltage. The device has a propagation delay of approximately 2.6ns. The input and output currents are limited to 24mA, however, the maximum output can be turned down to 10mA by activating the output sink current limiting feature, extending the operational life of the device.

The LMH7220MKX features an internal hysteresis and is available in different grades to suit different applications. The internal hysteresis helps prevent false triggering due to noise and ensures a prompt reaction of the device in the event of a switching input. The device is available with a minimum temperature stability of 2mV and a maximum output voltage swing of 0.2V.

In summary, the LMH7220MKX is a dual linear-comparator with a low-power consumption and various upgradeable features, designed to maximise performance in a range of applications. The set upper and lower bands for the inputs help to protect the device and guarantee reliable operation even in noisy environments. The device is suitable for a number of applications, including data acquisition, analog-to-digital conversion and control system applications.

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