LM4040BEM3-4.1+T Integrated Circuits (ICs)

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The LM4040BEM3-4.1+T is an application field of PMIC voltage reference, which is designed to provide an adjusted, 2.5V accuracy, and temperature compensated voltage reference for analog and digital applications.

LM4040BEM3-4.1+T adopts a microprecision 3-terminal bandgap reference architecture. It delivers 1.25V to 4.1V voltage adjustable range and have an initial accuracy of 0.04%. Additionally, it has an ultra-low power consumption of only 900nA，making it suitable for applications requiring significant energy savings. LM4040BEM3-4.1+T also features a temperature coefficient of 0.05%/℃, making it an excellent choice for highly temperature-sensitive applications.

The working principle of the LM4040BEM3-4.1+T is based on the principle of bandgap voltage reference. A bandgap voltage reference is a circuit that uses the electrostatic force in a semiconductor junction to maintain a constant voltage, even if the voltage on the drain or supply side changes. This circuit uses the thermal differences between two identical transistor junctions to manipulate the voltage output level. The two transistors are biased so that the collector voltages of both transistors remain at the same level, even when the temperature changes. The circuit then adjusts the thermal differences between the two identical transistor junctions to maintain a constant voltage, even if the voltage on the supply or drain side changes.

LM4040BEM3-4.1+T includes several temperature compensation techniques to adjust the output voltage of the bandgap reference with respect to temperature changes. Current mirrors used in the bandgap reference circuit determine the accuracy and stability of the reference voltage. These mirrors are designed with symmetrical components to minimize the effects of temperature drift. It also uses a temperature compensation circuit to adjust the voltage of the bandgap reference with respect to temperature changes. This temperature compensating circuit uses a negative temperature coefficient thermistor, or NTC thermistor, to reduce errors in the output voltage caused by temperature variations. The NTC thermistor works by increasing its resistance as temperature increases, which increases the output voltage of the reference.

In addition to its temperature compensation feature, the LM4040BEM3-4.1+T includes an input voltage range of 1.25V to 4.1V. This wide input voltage range makes the LM4040BEM3-4.1+T suitable for many different applications, such as wireless communication, medical devices, and industrial control systems. The voltage output of the LM4040BEM3-4.1+T can also be adjusted with a single external resistor, allowing for great flexibility in applications that require variable reference voltages.

Overall, the LM4040BEM3-4.1+T is a highly accurate and efficient voltage reference designed for applications requiring precision and temperature-stable reference voltages. Its wide input voltage range and adjustable output makes it suitable for many applications, and its low power consumption, high accuracy, and low temperature drift make it an excellent choice for temperature-sensitive applications.

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