LMV431BCM5 Integrated Circuits (ICs)

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Introduction: The LMV431BCM5 is a voltage reference designed to provide a high accuracy 0.1V voltage reference in a single package. The reference is tolerant to a wide range of temperatures, and its low noise and high accuracy make it ideal for a variety of applications. This document provides information about the application field and working principle of the LMV431BCM5.

Application Field: The LMV431BCM5 is used primarily as a reference in integrated circuits and other electronic equipment. It can provide an accurate 0.1V voltage reference for analog-to-digital converters and transducers, allowing for precise conversion of signals into digital form. Its wide temperature range also allows for use in extreme environmental conditions. Additionally, it can be used as a future reference for Power over Ethernet in PoE applications. Its low noise characteristics and precise voltage levels also make it well-suited for applications such as precision audio amplifiers, logic supply and reference voltage regulators, and discrete low voltage references.

Working Principle: The LMV431BCM5 is based on a band-gap reference topology, which converts a small band-gap voltage generated by a diode over temperature into a stable 0.1V voltage reference voltage. It has a high accuracy of 1mV over a wide temperature range of -40°C to +125°C, and is able to provide a reference accuracy of 0.1%. The reference voltage is generated by a voltage divider created by a pair of resistors and is tied to a buffered op amp in a series connection. The output of the op amp is then fed back to the negative terminal of the voltage divider and acts to stabilize the voltage across the voltage divider. The LMV431BCM5 ensures that its output reference voltage is maintained at precisely 0.1V over temperature variations, as well as providing excellent noise immunity.

Conclusion: The LMV431BCM5 is a high performance, low noise voltage reference that is ideal for use in a variety of applications. Its ability to provide an accurate 0.1V reference voltage over a wide temperature range makes it ideal for use in precision analog-to-digital converters, power over Ethernet applications, logic supply and reference voltage regulators, and discrete low voltage references. The LMV431BCM5 has a Band-Gap reference topology and a buffered op amp that ensure its output reference voltage is precisely 0.1V over temperature variation and provide excellent noise immunity.

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