MAX907CPA

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Linear - Comparators

The MAX907CPA is a single supply, low power and wideband rail-to-rail comparator. It is designed to operate from 2V to 16V power supplies, using a low quiescent current of 200μA. It includes a scaler output and a voltage feedback circuit that provides increased accuracy over temperature and power supply changes.

Application Field

The MAX907CPA is suitable for applications in power supplies, multiplexers, motor control, switch debouncing, and analog-to-digital converters, etc. It is also suitable for level detection, hysteresis control, security systems, video signal detection and false pulse elimination.

Working Principle

The MAX907CPA is a rail-to-rail comparator, with a typical response time of 2μs. The input stage of the MAX907CPA is designed to provide a rail-to-rail swing with 150 μVpp maximum input common-mode voltage range. The output stage is designed to swing rail-to-rail with 600 mV of integrated output overdrive voltage. It also includes a voltage feedback circuit that compensates the gain of the MAX907CPA for changes in temperature and power supply.

The MAX907CPA has a single power supply pin, as well as two input pins, two output pins and two output enable pins. It operates from a single power supply with a maximum voltage of +16V and a minimum of +2 V. The input pins accept both positive- and negative-going signals. The two output pins are open-drain and are used to indicate the polarity of the input signal. The two output enable pins are used to switch the outputs off in the event of a power supply failure.

The output of the MAX907CPA is a scaler signal that switches between two voltage levels. The transition from one level to the other occurs when the input signal equals a threshold voltage. The transition voltage is determined by an external voltage divider network that is connected to the COM and REF terminals.

The MAX907CPA also includes an output buffer amplifier that is designed to provide a low output impedance, allowing the output to respond to slow input signals. The output buffer amplifier is biased by an internal voltage regulator, providing additional power supply protection in the event of a sudden power supply drop.

In summary, the MAX907CPA is a low power, rail-to-rail comparator designed for single supply applications. It offers fast response time, rail-to-rail input and output swings, and an output buffer amplifier with low output impedance. It also includes a voltage feedback circuit that compensates the gain of the comparator for changes in temperature and power supply.

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