LM4132CMF-4.1/NOPB Integrated Circuits (ICs)

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Introduction

LM4132CMF-4.1/NOPB is a voltage reference from Texas Instruments. It is part of a family of voltage references products from TI developed for precision measurement, comparison and regulation of voltage levels. It can be used for linear and switch mode power control, industrial control and motor or actuator control. This specific chip provides a family of voltage references of up to 4.1V with an accuracy of ±12mV and a temperature coefficient of 0.2mV/°C.

Applications

LM4132CMF-4.1/NOPB is primarily used as a voltage reference in precision sensing circuits. It has a wide range of applications, including voltage regulation, precision current-sense monitoring, over-voltage and under-voltage protection. Furthermore, the device is suitable for use in the automotive industry, in industrial, networking, telecommunications and consumer electronics equipment.

The device is frequently used as a reference for operational amplifiers, allowing for a precise reference voltage to be generated and distributed across multiple circuits. It is also used in various applications such as, overvoltage and undervoltage load protection, signal conditioning, power management and motor and actuator control. Due to its advanced performance characteristics and its ability to reliably provide and maintain a precise reference for current and voltage, the LM4132CMF-4.1/NOPB has become an ideal choice for many applications.

Features

The device offers a wide range of features, making it suitable for a broad range of applications. These include precision voltage regulation, high accuracy, low power dissipation and low noise. It also offers high output accuracy and low temperature drift, making it ideal for temperature sensitive applications. The device provides a predictable temperature coefficient of ±0.2mV/°C, meaning that the reference voltage stays accurate under all temperatures. The device also features an overvoltage protection of up to 24V, allowing it to be used in harsh environments.

The LM4132CMF-4.1/NOPB also has a protective junction temperature rating (TJ max) of 150°C, enabling it to operate reliably in harsh environments or in high power applications. The device is also designed to be resilient against current surges, providing faster responses to overvoltages. The frequency response of the device is typically greater than 140kHz, meaning it can accurately switch between multiple voltages.

Working principle

The working principle of the LM4132CMF-4.1/NOPB is relatively simple. When the device is powered, a reference voltage is generated. This reference voltage is generated by a bandgap voltage reference (BVREF), which is made up of two currents sources in a reference gain stage. The current sources are then compared to a second gain stage in order to generate the accurate reference. This reference voltage is then used to control the voltage of the output.

NPN and PNP transistors are then used to increase the power capabilities of the device, allowing it to provide more stable power to a load. The transistors are connected in a common-emitter configuration and are operated via a bias-emitter circuit. This bias-emitter circuit controls the voltage on the emitters of the two transistors, allowing the current to be accurately regulated.

Conclusion

The LM4132CMF-4.1/NOPB is a high performance voltage reference designed by Texas Instruments. The device can provide a precise voltage reference up to 4.1V with an accuracy of ±12mV and a temperature coefficient of 0.2mV/°C. It is used in a wide variety of applications, including voltage regulation, precision current-sense monitoring, over-voltage and under-voltage protection, signal conditioning, power management and motor and actuator control. Its working principle is relatively simple, using a BVREF and current sources to control the voltage of the output.

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