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LM393

Name: LM393
Rating: 4.7 (12 reviews)

0.8MV 4.2NA DUAL CHANNEL SOP-8

Производитель
Мфр. Часть #LM393
Пакет
Лист данных
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Спецификации

Part Status	Active
Type	Standard (General Purpose)
Number of Elements	2
Output Type	Open-Collector, CMOS, MOS, TTL
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V
Voltage - Input Offset (Max)	5mV
Current - Input Bias (Max)	250nA
Current - Output (Typ)	43.7mA
Current - Quiescent (Max)	2.5mA
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Supplier Device Package	8-SOP

Обзор

Description

The LM393 is a dual comparator integrated circuit (IC) widely used in various electronic applications. It operates with a wide voltage range of 2V to 36V, making it versatile for different power supply configurations. The device consists of two independent comparators that can compare voltage levels and output a high or low signal based on the comparison.
Key features of the LM393 include low input offset voltage, high gain, and the ability to operate across a wide temperature range. The output is open-collector, allowing it to interface with various logic levels and making it suitable for driving loads directly or connecting to higher voltage systems.
Common applications include voltage level detection, zero-crossing detectors, and simple analog-to-digital converters. Due to its low cost and ease of use, the LM393 is a popular choice among hobbyists and professionals alike in designing circuits for signal conditioning and control systems.

Features

The LM393 is a dual comparator integrated circuit with several key features:
1. Dual Comparators: Contains two independent, high-speed voltage comparators.
2. Wide Supply Voltage Range: Operates from a single supply voltage of 2V to 36V or dual supplies of ±1V to ±18V.
3. Low Input Bias Current: Typically 100 nA, allowing for low-power applications.
4. Open-Collector Output: The outputs can connect to various voltage levels and are compatible with TTL logic.
5. Low Output Saturation Voltage: Ensures efficient performance in switching applications.
6. High Gain: Voltage gain typically around 100,000, providing precise signal differentiation.
7. Temperature Range: Designed to operate over a wide temperature range (-40°C to +125°C).
8. Compact Package Options: Available in various packages, including DIP and SOIC, for versatile applications.
Ideal for applications such as voltage level detection, signal conditioning, and timing circuits, the LM393 is widely used in industrial and consumer electronics.

Package

The LM393 is commonly available in a dual in-line package (DIP) form, typically in an 8-pin configuration. It can also be found in surface mount packages like SOIC and TSSOP. These packages facilitate easy integration into various electronic circuits.

Pinout

The LM393 is a dual comparator integrated circuit (IC) with a total of 8 pins. Here’s a brief overview of its pinout and functions:
1. Pin 1 (Output A): Output of comparator A.
2. Pin 2 (Inverting Input A): Inverting input for comparator A.
3. Pin 3 (Non-inverting Input A): Non-inverting input for comparator A.
4. Pin 4 (V- or Ground): Negative power supply or ground.
5. Pin 5 (Non-inverting Input B): Non-inverting input for comparator B.
6. Pin 6 (Inverting Input B): Inverting input for comparator B.
7. Pin 7 (Output B): Output of comparator B.
8. Pin 8 (V+ or Vcc): Positive power supply.
The LM393 operates as a voltage comparator, comparing two input voltages and outputting a digital signal based on which input is higher. It’s widely used in applications such as level detection, zero-crossing detection, and signal conditioning.

Manufacturer

The LM393 is manufactured by several semiconductor companies, with Texas Instruments (TI) being one of the most prominent sources. Texas Instruments is a global technology company known for designing and manufacturing a wide range of semiconductor products, including integrated circuits, analog chips, and embedded processors. Founded in 1930, TI is recognized for its innovation in the electronics industry and serves various sectors, including automotive, industrial, and consumer electronics. The LM393 itself is a dual comparator, commonly used in various applications such as signal conditioning, data conversion, and threshold detection. Other manufacturers of the LM393 include ON Semiconductor, STMicroelectronics, and Nexperia, among others, reflecting its widespread utilization in electronic designs.

Application

The LM393 is a dual comparator used in various applications, including:
1. Voltage Level Detection: Monitoring voltage levels for over-voltage or under-voltage conditions.
2. Zero Crossing Detection: Used in phase-locked loops and AC signal processing.
3. Temperature Sensing Circuits: Coupled with thermistors for temperature control systems.
4. Analog Signal Conditioning: Comparing two analog signals for signal processing.
5. Window Comparators: Establishing upper and lower thresholds for signal detection.
Its versatility makes it suitable for numerous automation and control applications.

Equivalent

Equivalent products to the LM393 chip include the LM2903, which is a dual comparator, and the LM339, which is a quad comparator. Other alternatives are the MCP6541, MCP6542, and TLV3701, depending on specific application requirements such as voltage range, speed, and power consumption. Always check the datasheets for exact specifications and compatibility.

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