LM2903QDG4

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The LM2903QDG4 is a quad-single supply comparator, which is a member of Linear?s family of devices specifically designed for automotive applications. The LM2903QDG4 is designed for applications where extremely low-power dissipation is essential. It is a low-cost, low-power circuit device that can be used in wide temperature range from -55°C to +125°C due to its minuscule power consumption (less than 25µA). To support the wide temperature range, the LM2903QDG4 has improved its input offset voltage, junction temperature range, and input voltage range. These improvements make it ideal for automotive applications such as engine control, diagnosis systems, crash detection, and other motor speed control applications.

The working principle of the LM2903QDG4 is based on a single comparator logic circuit. The comparator circuit consists of two inputs and one output. These inputs can be supplied with either differential or single-ended input signals. When the inputs are supplied with differential signals, the output is directly proportional to the difference between the two input signals. When the inputs are supplied with single-ended signals, the output is proportional to the absolute value of the input signal.

The LM2903QDG4 has open-drain output stages, allowing the output to be driven to both high and low logic level signals. This feature allows the device to be used in various types of logic circuits and can be used to set or reset flip-flops and memory circuits. The open-drain output can also be used to interface with other logic circuitry that requires inverted logic levels.

The LM2903QDG4 is available in a variety of packages that support multiple input and output configurations. These packages include the SOT-23 and SOIC-8 packages, which can accommodate up to four comparators in the same package. The SOD-123 package is available for applications that require two comparators in a very small footprint.

The LM2903QDG4\'s excellent performance and low power dissipation make it a perfect choice for automotive applications where low power and wide operating temperature ranges are essential. It offers outstanding performance for a variety of engine control, diagnosis system, crash detection, and other motor speed control applications. As a result, the LM2903QDG4 is an ideal solution for improving the performance and reliability of automotive electronic circuits.

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