MAX516AEWG+

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MAX516AEWG+ is a high-accuracy quad rail-to-rail CMOS comparator which features 4 independent, low-offset and rail-to-rail input operational amplifiers. This linear-comparator promises low input offset voltage and can also be used as wide-range current sense amplifier, precision logic-level translators and FET digital-to-analog converter (DAC).

Application field

MAX516AEWG+ can be used in various fields such as data converters, audio systems, industrial control, computer system and digital video equipment. In data converters, MAX516AEWG+ is the preferred comparator for digital-to-analog converters, analog-to-digital converters and pulse-width modulators. In audio systems, MAX516AEWG+ can act as an automatic level-control system, reducing distortion and dynamic range. In industrial control, it can be used to drive a solenoid or a motor transistor. In computers, it can be used in logic-level translators, latency control and delay-line parsing. Lastly, in digital video equipment, it can be used as comparator in a color-conversion system.

Working principle

The MAX516AEWG+ operates on the concept of an open-collector amplifier. In this system, the input signal is applied to the base terminal of the transistor, and the collector terminal is connected to the output node. When the input signal goes below the reference voltage, the transistor output is turned off and a low is delivered to the output node. Similarly, when the input voltage goes above the reference voltage, the transistor is turned on, causing a high to be delivered to the output node. This comparator acts as an open-collector amplifier because it only turns on or off the transistor; it does not actively drive the transistor.

The output of the MAX516AEWG+ can also be used to drive a N-channel MOSFET or P-channel MOSFET, which are commonly used in applications such as power driver and motor control. The IC features a wide common-mode range and rail-to-rail input and output. It also features a high-impedance state, which allows the device to be used as a logic-level translator, eliminating the need for a low-voltage logic-level shifter in many applications.

The applications include: input protection due to its high ESD immunity; power supply sequencing; power switching; small signs; off-state detection; level detection; over-voltage protection; and current monitoring. All of these applications make MAX516AEWG+ the ideal choice for many systems.

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