MAX942C/D

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The MAX942C/D is a versatile analog comparator designed to function as a single-ended or differential comparator. This comparator is ideal for applications such as switch-mode power supplies, current mode controllers, logic level detection, and pulse width modulation. It is also used as a basic building block in a variety of analog applications such as analog-to-digital converters and ADC blocks. It is designed to detect small differences between two analog signals.

This comparator is based on a differential amplifier with a common-mode gain of 1. This design provides fast switching speeds (up to 200 ns) and good matching properties. It has a high common-mode rejection ratio (CMRR) and can handle wide-ranging input voltages, from as low as ±2 volts to as high as ±20 volts. The MAX942C/D also offers excellent accuracy, with a total differential non-linearity of ±0.2 % and a temperature drift of ±20 µV/°C.

The MAX942C/D is available in three versions. The MAX942C has a single-ended comparator with a common input and an active low output. The MAX942D has a differential input structure with a balanced output. The third version is the MAX942D+ with a differential input structure with both active-low and active-high output. All three versions are available in both 5-pin SOT23 and 8-pin SOIC packages.

The MAX942C/D is designed to operate on a single +5 V power supply. It has an input offset voltage of ±2 mV and supply current of 600 µA. It has an output current of 16 mA and can drive both TTL and CMOS logic levels. It is internally protected from overload, reverse polarity, and ESD damage.

The main advantage of the MAX942C/D is its high speed. It can switch its output quickly, in as little as 200 ns. This makes it ideal for applications such as peak detecting, window testing, single-cycle clocking, and sampling. It can also detect level transitions quickly, allowing for a fast response time when controlling switching power supplies or pulse width modulation (PWM) or digital-to-analog converters (DAC).

The comparator also offers excellent repeatability and accuracy. It has a low input offset voltage and low supply current, which allows it to power other circuits without drawing too much current. It also provides high common-mode rejection ratio (CMRR) and temperature drift of ±20 µV/°C, which makes it suitable for use in temperature-sensitive applications.

In summary, the MAX942C/D is a versatile analog comparator designed to detect small differences between two analog signals. It has fast switching speeds, excellent accuracy, and good repeatability. It can be used in a variety of applications, such as switch-mode power supplies, current mode controllers, logic level detection, and PWM. Most importantly, it can handle a wide range of input voltages and provide high CMRR and low supply current. It is available in three versions and in both 5-pin SOT23 and 8-pin SOIC packaging.

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