LM311DT

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LM311DT

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IC VOLTAGE COMPARATOR 8-SOIC

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Thông số kỹ thuật

thuộc tính Giá trị
Package Tape & Reel (TR),Cut Tape (CT)
ProductStatus Active
Type General Purpose
NumberofElements 1
OutputType DTL, MOS, Open-Collector, Open-Emitter, RTL, TTL
Voltage-SupplySingle/Dual(±) 5V ~ 30V, ±2.5V ~ 15V
Voltage-InputOffset(Max) 7.5mV @ ±15V
Current-InputBias(Max) 0.25µA @ ±15V
Current-Output(Typ) 50mA
Current-Quiescent(Max) 7.5mA
OperatingTemperature 0°C ~ 70°C
Package/Case 8-SOIC (0.154, 3.90mm Width)
MountingType Surface Mount

Tổng quan

Description

The LM311DT is a versatile voltage comparator integrated circuit that is widely used in electronic applications. It features a single comparator in an 8-pin DIP or SOIC package. The LM311DT is known for its ability to operate over a wide range of voltages, from 3V to 32V, making it suitable for both low and high voltage applications.
This comparator is designed to provide fast response times, typically around 200 ns, allowing it to handle high-speed signal processing. It also has a flexible input, capable of comparing both differential and single-ended inputs. The output of the LM311DT is compatible with TTL, DTL, and CMOS logic levels, providing easy integration with digital systems.
Additionally, the LM311DT comes with a strobe functionality, which can be used to enable or disable the output. This feature is useful in applications requiring precise control of the comparator's output state. Its ability to sink or source current makes it a preferred choice for driving LED indicators and other load components directly. Overall, the LM311DT is valued for its reliability, versatility, and ease of use in various electronic circuits.

Equivalent

The LM311DT is a voltage comparator. Equivalent products include the LM311N, LM311P, and LM311M, which are variations within the same series. Other equivalents are the LM311 from various manufacturers like Texas Instruments and ON Semiconductor. Additionally, alternatives like the UA311, CA311, and the TL331 can be considered based on similar functionalities, although pin configurations and specific parameters should be verified for compatibility.

Features

The LM311DT is a high-speed voltage comparator with several key features:
1. Wide Supply Voltage Range: It operates over a wide range of supply voltages, from ±5V to ±15V, making it versatile for various applications.
2. High-Speed Operation: The LM311DT is capable of fast response times, typically with a propagation delay of around 200 nanoseconds, which is suitable for high-speed operations.
3. Low Input Offset Voltage: It has a low input offset voltage, typically around 2 mV, providing precise voltage comparison.
4. Output Compatibility: The output is compatible with TTL, DTL, ECL, MOS, and other logic families, enhancing its usability in different systems.
5. Adjustable Strobe Capability: It includes a strobe function that can be used for precision timing applications.
6. Wide Input Common-Mode Voltage Range: It allows for differential input voltages without the need for level shifting, simplifying circuit design.
7. Open-Collector Output: This feature enables wired-AND connections, useful in multiple comparator configurations.
These features make the LM311DT suitable for zero-crossing detectors, pulse-width modulation circuits, and various other signal processing tasks.

Pinout

The LM311DT is a voltage comparator integrated circuit. It is typically housed in an 8-pin package. Here's a brief overview of its pin functions:
1. Pin 1 (Ground): Connected to the ground or the negative supply voltage.
2. Pin 2 (Non-Inverting Input): The positive input for the comparator.
3. Pin 3 (Inverting Input): The negative input for the comparator.
4. Pin 4 (Vcc+): Positive supply voltage terminal.
5. Pin 5 (Balance): Used for offset voltage balancing, not often used in standard applications.
6. Pin 6 (Balance/Strobe): Can be used for either balancing the offset voltage or strobing the output.
7. Pin 7 (Output): The output of the comparator; it is an open collector output.
8. Pin 8 (Vcc-): Negative supply voltage terminal, typically connected to ground in single supply applications.
The LM311 is a versatile comparator used in various applications, including zero-crossing detectors, relaxation oscillators, and high-speed voltage compare circuits.

Manufacturer

The LM311DT is manufactured by STMicroelectronics. STMicroelectronics is a global semiconductor company that designs, develops, manufactures, and markets a wide range of semiconductor products. It operates in various segments including automotive, industrial, personal electronics, communications equipment, and the Internet of Things (IoT). The company is recognized for producing analog and digital integrated circuits, microcontrollers, sensors, and power management devices, among other products.
Founded in 1987 through the merger of SGS Microelettronica of Italy and Thomson Semiconducteurs of France, STMicroelectronics has established itself as a key player in the semiconductor industry. Its headquarters are situated in Geneva, Switzerland, and it operates worldwide with significant R&D, manufacturing, and sales operations across Europe, Asia, and the Americas. STMicroelectronics focuses on innovation and sustainability, aiming to provide technology solutions that enhance the quality of life and contribute to environmental sustainability.

Application

The LM311DT is a voltage comparator used in various applications requiring precise voltage level detection. It is commonly employed in zero-crossing detectors, peak detectors, and Schmitt triggers. Additionally, it is used in pulse-width modulation (PWM) circuits, where it helps to generate or regulate PWM signals. The LM311DT finds application in analog-to-digital converters (ADCs) by acting as a level shifter or threshold detector. It is also useful in over-voltage and under-voltage protection circuits in power supply systems. Its ability to operate over a wide range of supply voltages and its fast response time make it suitable for use in industrial, automotive, and consumer electronics applications.

Package

The LM311DT is a voltage comparator IC housed in a surface-mount Small Outline Package (SOP) with 8 pins. This package type is also known as SO-8 or SOIC-8. It's designed for compact applications where board space is a constraint.

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