LM339ADT

Current - Input Bias (Max):	0.1µA @ 5V
Base Part Number:	LM339
Supplier Device Package:	14-SO
Mounting Type:	Surface Mount
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Operating Temperature:	0°C ~ 70°C
Hysteresis:	--
Propagation Delay (Max):	--
CMRR, PSRR (Typ):	--
Current - Quiescent (Max):	2.5mA
Current - Output (Typ):	16mA @ 5V
Series:	--
Voltage - Input Offset (Max):	2mV @ 30V
Voltage - Supply, Single/Dual (±):	2 V ~ 32 V, ±1 V ~ 16 V
Output Type:	CMOS, DTL, ECL, MOS, Open-Collector, TTL
Number of Elements:	4
Type:	General Purpose
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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LM339ADT Application Field and Working Principle

The LM339ADT is a quad-comparator, which can be used to solve a large range of analog signal comparison problems. It has so many applications that most engineers cannot imagine designing without it. It is also used for low-power and small size applications. In this article, we will discuss the application field and working principle of the LM339ADT.

Application Field

The LM339ADT is mainly used in analog signal control and comparison applications. It is often used as window comparators, logic circuit design, motion and engine control systems, level detection or detection of voltage or current thresholds, and settings for LDOs and switching power converters. In addition, the LM339ADT can also be used in consumer electronics such as portable computers, TVs, refrigerators and air conditioners. It is also widely used in hi-fi audio amplifiers, LCDs, personal computers, digital oscilloscopes and many other electronic products.The LM339ADT has excellent noise immunity, low power consumption, low output impedance and extremely low voltage offset. Therefore, it is also used in medical devices such as EEG and ECG equipment, robotic sensing, automotive systems, and more.

Working Principle

In theory, the LM339ADT\'s working principle is simple. It is a four-channel device designed to compare two different analog signals. The device has four independent inputs, each with a separate reference voltage.The four channels comprises two sets of two comparators, in a \'long-tailed\' configuration. This configuration enables the LM339ADT to detect small signals and voltages, providing improved accuracy and responsiveness.When a voltage applied to one of the two inputs is greater, then the output of the comparator will be high. Conversely, when the other input\'s voltage is higher, then the output will be low. This is the driving principle behind the LM339ADT.The LM339ADT also features open drain outputs that pull low when the output is high, making it ideal for interfacing with switches and logic circuits. The device is rated to operate over a temperature range of -40 to +85 degrees Celsius and works off an operating voltage of 4.5V to 16.0V.

In conclusion, the LM339ADT is an incredibly useful integrated circuit for analog signal control and comparison. Its low power consumption, low voltage offset, high accuracy, noise immunity, and open drain outputs make it perfect for a wide range of different applications.

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