LM393ADG4

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The LM393ADG4 belongs to the Linear-Comparators category, and it is an integrated circuit containing two independent comparators. It is used for different applications such as level detection, timer, waveform generation, and peak power detection. This article discusses the application fields and working principles of the LM393ADG4.

Features of the LM393ADG4

The LM393ADG4 has several features that make it useful in different applications. It has low quiescent current and operates at low voltage, making it suitable for battery-powered systems. It has low input bias and offset currents, minimizing the effect of source current on input bias. The device also has a built-in hysteresis comparator which is designed to keep the output state locked, meaning the output is not affected by noise. The LM393ADG4 also has low propagation delay and long output hold times, making it ideal for high-speed operations.

Application Fields of the LM393ADG4

The LM393ADG4 is used in different application fields as mentioned above. It is a common choice for level detection; for example, it can be used to detect when a signal reaches a certain threshold. As mentioned earlier, it has low quiescent current and operates at low voltage, making it suitable for battery-powered systems. This makes it suitable for use in portable devices where battery life is important.

Another application field for the LM393ADG4 is timer applications. Due to its low propagation delay and long output hold time, it is suitable for applications that require quick response times and accurate results. For example, it can be used in timing applications such as period generators, frequency dividers, and pulse width and duty cycle modulators.

The LM393ADG4 is also used in waveform generation applications. It can be used to generate waveforms such as sine waves, square waves, and triangle waves. Additionally, it can be used to measure peak power in a given device or system.

Working Principle of the LM393ADG4

The LM393ADG4 contains two independent comparators inside the same integrated circuit. The two comparators are connected through an output transistor, which is used to compare the inputs from both comparators. When the input from one comparator is greater than the input from the other, the output transistor turns on, allowing the output voltage to be changed. This is known as the hysteresis comparator. The hysteresis comparator is designed to keep the output voltage stable, even under noisy conditions. The amount of hysteresis can be varied, allowing for different applications.

To use the LM393ADG4, a positive and a negative power supply is needed. The positive power supply is typically between 4.5-6.5V, and the negative power supply is typically between -4.5 to -6.5V. Once the power supply is connected, if the voltage difference between the two inputs is more than one-third of the total power supply, the output is changed accordingly. This is the basic operation of the LM393ADG4.

Conclusion

The LM393ADG4 is a useful integrated circuit containing two independent comparators. It is used in different application fields such as level detection, timer, waveform generation, and peak power detection. It is considered to be an economical and reliable solution due to its low quiescent current, low input bias and offset current, hysteresis comparator, low propagation delay and long output hold time. It requires a positive and a negative power supply to operate, and the output is changed according to the difference in the input voltages.

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