MAX473EPA

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The MAX473EPA is a precision voltage comparator manufactured by Maxim Integrated. It is part of the instrumentation, OP amplifier and buffer amplifier categories of linear amplifiers. It is a high-speed, rail-to-rail input/output comparator, capable of operating in single- or split-supply operation from +2.7V to +36V or ±2.25V to ±18V. The precision voltage comparator is ideal for applications in low-voltage systems, and for current limiting, bar graph displays, digital control hardware, over-voltage/under-voltage detection, power-on reset, pulse-width modulation (PWM), and temperature measurement.

The MAX473EPA has two seperate and independent comparators, A and B. The A-comparator has an input common-mode voltage range of -0.3V to Vdd + 0.3V. The B-comparator has an input common-mode voltage range of 0.2V to Vdd+0.3V. Both inputs also have an output range of -0.3V to Vdd+0.3V. The output of either comparator can be open-drain, with TTL or CMOS compatible interface.

The MAX473EPA has many features to make it an excellent choice for many applications. It has low input bias currents, low voltage offsets, matched propagation delay, and has a low supply current of 7 mA at +5V. It also has low input-referred noise of 12 nV / √Hz and low input capacitance of 9 pF. Additionally, the MAX473EPA is capable of operating at temperatures as low as -40 degrees Celsius while maintaining its specified performance.

The main application field of the MAX473EPA is low voltage systems, such as those used in portable medical devices, automotive control systems, and bar graph displays. It is also used in applications such as current limiting, pulse-width modulation (PWM), and over-voltage/under-voltage detection. The MAX473EPA also makes an ideal power-on reset, as it\'s low voltage offsets and matched propagation delay ensures stable operation in a variety of environments.

The working principle of the MAX473EPA involves two differential pair input stages, followed by a current mirror output stage. The differential pair input stages drive a current into a current mirror, which in turn controls the output current. The output current is proportional to the positive input voltage, with a positive voltage causing a positive output current, and the output is saturated if the input voltage is greater than the positive supply voltage. The MAX473EPA is actually two comparators in one package, with the same input and output stages being used for both the A and B comparators.

The MAX473EPA is a precision voltage comparator from Maxim Integrated, which has many features that make it an excellent choice for many applications. It is suitable for low voltage systems, current limiting, over-voltage/under-voltage detection, pulse-width modulation (PWM) and power-on reset. The working principle of the MAX473EPA involves two differential pair input stages that drive a current into a current mirror, resulting in an output current proportional to the input voltage. The MAX473EPA is a great addition to linear amplifiers as it provides a wide range of features and a robust and reliable performance.

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