LM339AN

Current - Output (Typ):	20mA
Current - Quiescent (Max):	2.5mA
CMRR, PSRR (Typ):	--
Propagation Delay (Max):	--
Hysteresis:	--
Operating Temperature:	0°C ~ 70°C
Package / Case:	14-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Supplier Device Package:	14-PDIP
Base Part Number:	LM339
Series:	--
Packaging:	Tube
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Differential
Number of Elements:	4
Output Type:	CMOS, MOS, Open-Collector, TTL
Voltage - Supply, Single/Dual (±):	2 V ~ 30 V, ±1 V ~ 15 V
Voltage - Input Offset (Max):	3mV @ 30V
Current - Input Bias (Max):	0.25µA @ 5V

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Introduction

The LM339AN is an integrated circuit that contains four independent voltage comparators, and is widely used for a variety of electronic applications such as voltage monitoring and control, feedback circuits, filtering and differential amplifiers. This article will focus on the application field and working principle of the LM339AN, which falls into the linear-comparators category.

LM339AN Application

The LM339AN is used for a variety of applications that require the comparison of two different voltages. These applications include voltage monitoring and control, feedback circuits, low-power voltage comparison, and differential amplifiers. When connected with an external circuit, the LM339AN is capable of providing an accurate level of voltage comparison.In voltage monitoring and control applications, the LM339AN is used in conjunction with a voltage reference circuit. This voltage reference circuit is used to compare the required output level with the actual output level. Based on the comparison, the LM339AN provides a control signal to adjust the output level accordingly.The LM339AN is also used in feedback circuit applications. These circuits use the output from the LM339AN to measure the input voltage, and the error is used to adjust the output voltage accordingly.The LM339AN can also be used for filtering, as the comparator can detect changes in the incoming signal and switch the output state based on predetermined criteria. This can be used for noise rejection and other filtering applications.Finally, the LM339AN can be used for differential amplifiers. The output of the LM339AN is used to control the input voltage of a differential amplifier. This is used to amplify the difference between two input signals, and is useful for audio applications.

LM339AN Working Principle

The LM339AN is a quad comparator with four independent comparators, each with their own input and output pins. Each comparator can be configured independently, and the inputs can be either independent or connected in series. Each comparator is designed to compare two separate input voltages, one on its positive input terminal, and one on its negative input terminal. If the input voltage on the positive terminal is greater than that of the negative terminal, a high voltage is output from the comparator. Conversely, if the input voltage on the negative terminal is greater than that of the positive terminal, a low voltage is output from the comparator.The LM339AN also includes an open-drain output for driving either N-channel MOSFETs or multiple logic devices. This open-drain output can be configured to be either active-high or active-low, depending on the specific application requirement.

Conclusion

The LM339AN is an integrated circuit that contains four independent voltage comparators, and is widely used for a variety of electronic applications such as voltage monitoring and control, feedback circuits, filtering and differential amplifiers. The LM339AN works by comparing two separate input voltages, and is able to provide an accurate level of voltage comparison. Additionally, the LM339AN can be used with an external circuit to provide an open-drain output for driving either N-channel MOSFETs or multiple logic devices.

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