NJM2138M

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The NJM2138M is a relatively simple and inexpensive operational amplifier that is ideal for direct use in a variety of applications including instrumentation, audio, video, RF, and power systems. This article will discuss the application field and working principle of the NJM2138M, including its key features, how it operates, and how it can be used in different contexts.

Introduction

The NJM2138M is a monolithic integrated circuit (IC) operational amplifier based on a complementary MOS (CMOS) process. It is a low-voltage, low-power, highly efficient device suitable for use in power system control circuits, audio, video, and RF applications. Specifically designed for a wide range of current sources and voltage regulation, the NJM2138M integrates both a power amplifier and CMOS digital logic circuit to provide a highly efficient and reliable operational amplifier.

Features

The NJM2138M features a number of features that make it ideal for use in a variety of applications. It has a wide supply voltage range of 2.7V to 6.0V and is capable of supplying up to 15 volts of output swing. It offers a maximum output current of 75mA and can achieve a typical output power of 1W with a load of 10 ohms. The NJM2138M also has a maximum operating temperature range from -40℃ to 125℃. Additionally, it offers excellent accuracy and low capacitive loading for improved power efficiency.

Working Principle

The NJM2138M operates through the combination of two transistors, an n-channel and a p-channel. The n-channel transistor is connected to the negative terminal of the power supply, while the p-channel is connected to the positive terminal. When the input voltage is higher than the VCC voltage, the n-channel transistor is turned on and a current flows from the positive terminal to the negative terminal. When the input voltage is lower than the VCC voltage, the p-channel transistor is turned on and a current flows from the negative terminal to the positive terminal.

In the NJM2138M, this current flowing between the two transistors creates an input/output voltage gain, which can be adjusted through the use of external resistors. This voltage gain is one of the major advantages of the NJM2138M, as it allows users to modify the output signal based on their specific requirements.

Applications

The NJM2138M can be used in a variety of applications. It is often used in audio amplifiers, video amplifiers, RF amplifiers, and instrumentation. In audio systems, the NJM2138M can be used as an inverting amplifier, which converts AC signals into DC signals. In video systems, it can be used as an audio to video converter. In RF systems, it can be used as a power amplifier to boost the signal strength. In instrumentation, it can be used as a signal conditioner or for power supply regulation.

In general, the NJM2138M is an ideal device for applications requiring low current consumption, excellent accuracy, low power dissipation, and high output capability. It is also ideal for applications where high voltage gain, low output impedance, and low noise are important design parameters.

Conclusion

The NJM2138M is a practical and affordable operational amplifier suitable for use in a variety of applications, including instrumentation, audio, video, and RF systems. Its features provide users with a high degree of control and flexibility when designing systems, allowing them to optimize their designs for specific requirements. Its ease of use and wide supply voltage range make it an attractive choice for those looking for a low-cost and efficient operational amplifier solution.

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