LM4431M3X-2.5 Integrated Circuits (ICs)

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The LM4431M3X-2.5 is a precision reference designed to provide a temperature-compensated voltage reference and buffered output voltage for applications requiring advantages of a voltage reference in one integrated device. It features a 2.5V output, low temperature coefficient (0.8 ppm/°C typical) and low-noise linear regulation circuitry. As an ultra-low-dropout (LDO) voltage reference, it meets demanding accuracy requirements of precision analog and communications applications.

The LM4431M3X-2.5 is a pmic voltage reference that is ideal for a variety of analog and communications applications, such as precision sensing and data-acquisition circuits, ADC/DAC systems, clocks, power supplies, and voltage regulators. It operates from either a single-ended or split power-supply rail, allowing it to work in noisy power environments. The LM4431M3X-2.5 also offers dropout operation so that the output voltage does not vary significantly as the input voltage changes.

The LM4431M3X-2.5 has a wide operating temperature range from -40°C to +85°C, allowing it to faithfully meet the needs of the most extreme operating conditions. The low-noise linear regulating circuitry greatly reduces noise-induced errors while offering superior load-transient performance. Additionally, the device has overload and output short-circuit protection to ensure safe and reliable operation in most applications.

The LM4431M3X-2.5 is part of the LTC33 family of precision references from Texas Instruments. It uses a proprietary architecture to achieve a temperature coefficient of 0.8 ppm/°C typical. The device also has a low dropout voltage of 0.3V and a power-supply rejection ratio of 80 dB. Additionally, the device features low output voltage noise (350 nV RMS) and fast start-up time (25 μs). The device is offered in a small TSOT package.

The LM4431M3X-2.5 works by providing a precision reference voltage in the form of a buffered output voltage. The device provides very low dropout voltage, resulting in an output voltage that tracks with the input voltage under varying load conditions. It features an on-chip comparator which allows the device to provide an accurate temperature-compensated voltage reference. The device also incorporates overload and output short-circuit protections.

In summary, the LM4431M3X-2.5 is an ultra-precision voltage reference that is ideal for use in a variety of analog and communications applications. It operates from either a single-ended or split power-supply rail and has an extremely low temperature coefficient and noise-induced errors. It also features overload and output short-circuit protection for reliable operation in extreme conditions. Its small size and flexibility make it an ideal choice for many precision reference applications.

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