LM339ADT

Product Overview

Category: Integrated Circuits (ICs)

Use: LM339ADT is a quad voltage comparator that is commonly used in various electronic circuits for comparing voltages and making decisions based on the comparison results.

Characteristics: - Low power consumption - Wide supply voltage range - High input impedance - Open collector outputs - Fast response time

Package: LM339ADT is available in a small outline package (SOIC) with 14 pins.

Essence: The essence of LM339ADT lies in its ability to compare voltages and provide digital outputs based on the comparison results.

Packaging/Quantity: LM339ADT is typically sold in reels or tubes, with each reel/tube containing a specific quantity of ICs. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Supply Voltage Range: 2V to 36V
• Input Offset Voltage: 2mV (maximum)
• Input Bias Current: 25nA (maximum)
• Response Time: 1.3μs (typical)
• Output Current: 6mA (maximum)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

LM339ADT has a total of 14 pins arranged as follows:

```

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| | - |1 14| + + |2 13| - - |3 12| Output D + |4 11| Output C - |5 10| Output B + |6 9| Output A - |7 8| Vcc |___________| ```

Functional Features

• Quad voltage comparator: LM339ADT contains four independent voltage comparators in a single IC package.
• Open collector outputs: The outputs of each comparator are open collector, allowing easy interfacing with other digital circuits.
• Wide supply voltage range: LM339ADT can operate from a supply voltage as low as 2V and as high as 36V, making it suitable for various applications.
• Low power consumption: LM339ADT consumes very low power, making it ideal for battery-powered devices.

Advantages and Disadvantages

Advantages: - Versatile and widely used in many electronic circuits - Low power consumption extends battery life in portable devices - High input impedance allows for easy integration into different systems - Fast response time enables quick decision-making based on voltage comparisons

Disadvantages: - Limited output current capability - Requires external pull-up resistors for proper operation - Sensitivity to noise and fluctuations in the input voltage

Working Principles

LM339ADT works by comparing the voltages applied to its inputs and producing digital outputs based on the comparison results. Each comparator inside LM339ADT consists of a differential amplifier followed by an output stage with an open collector. When the voltage at the non-inverting input is higher than the voltage at the inverting input, the corresponding output goes low (logic 0). Conversely, when the voltage at the non-inverting input is lower, the output remains high (logic 1).

Detailed Application Field Plans

LM339ADT finds applications in various fields, including: 1. Voltage level detection and monitoring 2. Signal conditioning and amplification 3. Motor control circuits 4. Battery charging/discharging control 5. Overvoltage/undervoltage protection circuits 6. Window comparators 7. Oscillators and timers

Alternative Models

Some alternative models to LM339ADT include: - LM2901 - LM311 - LM393 - LM324

These models offer similar functionality and can be used as substitutes depending on the specific requirements of the application.

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