LM339ADG4

Overview

Category: Integrated Circuit (IC)

Use: Voltage Comparator

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

Package: SOIC-14

Essence: The LM339ADG4 is a quad voltage comparator that operates from a single power supply. It is designed to compare two voltages and provide a digital output indicating which voltage is higher.

Packaging/Quantity: The LM339ADG4 is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 2V to 36V
• Input Offset Voltage: 2mV (maximum)
• Input Bias Current: 25nA (maximum)
• Response Time: 1.3μs (typical)
• Output Sink Current: 16mA (maximum)

Pin Configuration

The LM339ADG4 has a total of 14 pins, arranged as follows:

___________ 1 | | 14 2 | | 13 3 | | 12 4 | | 11 5 | | 10 6 | | 9 7 | | 8 |_____________|

Functional Features

• Quad voltage comparator with open collector outputs
• Can operate from a single power supply or dual supplies
• Provides a digital output indicating the comparison result
• Suitable for applications requiring level shifting or driving TTL or CMOS logic

Advantages and Disadvantages

Advantages: - Low power consumption makes it suitable for battery-powered devices - Wide supply voltage range allows for versatile use - High input impedance minimizes loading effects on the input signals - Open collector outputs provide flexibility in interfacing with other circuits - Fast response time enables quick comparison and decision-making

Disadvantages: - Limited output current capability may require additional buffering for certain applications - Input offset voltage may introduce small errors in precision applications

Working Principles

The LM339ADG4 compares two input voltages, V+ and V-, and produces a digital output based on their relative magnitudes. When V+ is higher than V-, the output is pulled low (sink), and when V- is higher than V+, the output is high impedance (open). The comparator operates by amplifying the voltage difference between the inputs and comparing it to an internal reference voltage.

Detailed Application Field Plans

The LM339ADG4 finds applications in various fields, including: 1. Battery chargers and power management systems 2. Motor control circuits 3. Signal conditioning and level shifting circuits 4. Overvoltage and undervoltage protection circuits 5. Window comparators for threshold detection 6. Pulse width modulation (PWM) circuits 7. Voltage monitoring and alarm systems

Alternative Models

Some alternative models that can be considered as replacements for the LM339ADG4 include: - LM393: Dual voltage comparator - LM311: Single voltage comparator with differential inputs - LM324: Quad operational amplifier with similar functionality

These alternatives offer different features and specifications, allowing designers to choose the most suitable option for their specific application requirements.

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