LM4128BMFX-1.8

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A voltage reference, also known as a voltage regulator, is an electrical device that provides a stable voltage at a certain level. Voltage references are widely used in applications such as providing a stable reference voltage to precision analog circuits, ensuring the accuracy of measured signals, and in data converters. The LM4128BMFX-1.8 is an advanced voltage reference IC designed to provide a highly accurate and low noise voltage reference at 1.8V. This IC is produced by Linear Technology and is an updated version of their predecessor, the LM4128. It has a wide voltage range of 2.7 to 5.5V and its power consumption is only 1.3mA.

The LM4128BMFX-1.8 is highly suitable for use in precision analog applications such as medical imaging, automotive electronics, and industrial sensors, where a low noise, high accuracy voltage reference is needed. The device has a wide voltage range of 2.7 - 5.5V and can provide a maximum output current of 10mA. It also has an on-chip precision bandgap cell, which helps to reduce noise level and improve accuracy.

The working principle behind the LM4128BMFX-1.8 is based on the bandgap voltage reference principle. This principle states that when two different transistors are connected in a circuit and a bias voltage is applied, the voltage between the two transistors can be kept constant. This voltage is known as the bandgap voltage.

The LM4128BMFX-1.8 is composed of three major blocks. These are the bandgap voltage reference, the voltage reference current source, and the voltage reference output buffer. The bandgap voltage reference is responsible for maintaining a stable and accurate reference voltage. It also contains two temperature sensing circuits to protect the IC from over temperature conditions.

The voltage reference current source is used to ensure that the output voltage value is stable over temperature. It also helps in reducing the power dissipation of the IC. Finally, the voltage reference output buffer helps in reducing the output noise and provides the required accuracy of the reference voltage.

The LM4128BMFX-1.8 is a highly accurate and low power voltage reference device which is suitable for use in precision analog applications. Its low noise and high accuracy make it a desirable choice for a wide range of applications. The voltage reference principle and features of the LM4128BMFX-1.8 help to ensure the accuracy and stability of the reference voltage and thus, is suitable for any precision analog application.

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