LM358NG

LM358NG Application Field and Working Principle

In the world of circuits and electronic devices, the LM358NG is often used to create low power, two-channel operational amplifiers. This particular device is often used in basic linear applications and provides the user with the ability to configure any number of functions and features. As such, the LM358NG is a popular choice among many hobbyists and professional electronics engineers. In this article, we will discuss the specifics of the LM358NG and the various applications that it can be used for.

The LM358NG is a general purpose, monolithic integrated circuit available in an 8-lead Dual-In-Line (DIP) form. It contains two independent, high-gain internally frequency compensated operational amplifiers. As mentioned, the LM358NG is primarily used for basic linear applications such as instrumentation amplifiers, current-sense amplifiers, voltage-follower amplifiers, active filters, A/D converters, and much more. It is capable of producing stable outputs with a minimum phase shift and common-mode rejection ratios of up to 80dB.

Working Principle

The two amplifier sections of the LM358NG are designed to operate from a single power supply, or even dual supply if required. In the single supply configuration, the voltage range is typically +3V to +12V, while the dual supply voltage range is usually +3V to +18V. The gains of both amplifier sections are controlled by an external feedback resistor divider network and can be adjusted up to a maximum of 400 with these components.

The two amplifier sections of the LM358NG have a unity gain bandwidth of up to 1MHz. This means that it can adequately respond to input frequencies as high as 1MHz and can accurately reproduce the same without distortion. Additionally, the input common-mode voltage range for the device covers the positive and negative power supply rails, making it ideal for a wide range of applications.

Features

The LM358NG is a part of National Semiconductor’s high-performance R-type family of operational amplifier ICs, offering many features and advantages over other commonly used amplifier ICs. Some of these features and advantages include:

• High common-mode rejection up to 80dB
• Low power consumption
• Independent bias and disable functions for each amplifier section.
• Low noise and distortion
• Low voltage operation
• Matched internal frequency compensation
• Free from latch-up

Applications

One of the most popular applications for the LM358NG is in signal processing. For example, it can be used to provide signal isolation, amplification and signal conditioning for audio output stages, microphone preamplifier stages, or signal filtering in other types of applications. It is also useful in signal-to-noise ratio improvement and filtering at medium to high frequencies. The LM358NG is commonly used in power supply circuits, level shifters, drive circuits, temperature controllers and data acquisition systems too.

The LM358NG is also used quite often as a part of motor speed controllers, such as motor speed control for fans, pumps, and window motors. It can be used to create instrumentation amplifiers for measuring small differential voltages. It is also used in A/D converters and analog low-bandwidth filters. The low power feature of the LM358NG is especially helpful when it is used in devices where energy efficiency is very important.

Conclusion

The LM358NG is a versatile and powerful amplifier IC. It is primarily used for basic linear applications and can produce stable and accurate results. Its low power consumption makes it ideal for applications where power is at a premium and its high common-mode rejection ratio make it very useful for signal processing applications. Due to its many features and advantages, the LM358NG is a popular choice among electronics hobbyists and engineers.