LM311M

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LM311M

IC COMPARATOR SINGLE 8-SOP

  • Manufacturer
  • Mfr. Part #LM311M
  • Package SOIC (D)-8
  • Datasheet
  • In Stock5617

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Specifications

Package Tube
ProductStatus Obsolete
Type General Purpose
NumberofElements 1
OutputType Open-Collector, Open-Emitter
Voltage-SupplySingle/Dual(±) 5V ~ 30V, ±2.5V ~ 15V
Voltage-InputOffset(Max) 7.5mV @ 15V
Current-InputBias(Max) 0.25µA @ 15V
Current-Quiescent(Max) 7.5mA
OperatingTemperature 0°C ~ 70°C
Package/Case 8-SOIC (0.154, 3.90mm Width)
MountingType Surface Mount

Overview

Description

The LM311M is a dual comparator integrated circuit (IC) designed for high-speed voltage comparison in various applications. It features two independent comparators that can operate on a wide supply voltage range, from 3V to 36V. The LM311M is known for its fast response time, typically around 1.5 microseconds, making it suitable for applications that require quick signal processing.
Key features include open-collector outputs, which allow for easy interfacing with other logic levels and the ability to connect multiple outputs to a single supply voltage. The LM311M also offers good temperature stability and low input offset voltage, ensuring accurate comparisons.
Common applications include voltage level detection, over-voltage protection, and zero-crossing detection in signal processing. The LM311M is widely used in industrial, automotive, and consumer electronics for its reliability and performance. Its dual configuration allows for efficient use of space and resources in circuit design.

Features

The LM311M is a dual comparator designed for high-speed performance. Key features include:
1. Dual Comparator: Contains two independent comparators, allowing for versatile applications.
2. Wide Supply Voltage Range: Operates from a single supply of 5V to 30V, or dual supplies of ±2.5V to ±15V.
3. High Speed: Offers a response time of approximately 1.5 µs, making it suitable for fast signal processing.
4. Open-Collector Output: Provides flexibility in interfacing with various logic levels.
5. Low Input Offset Voltage: Ensures high accuracy with an offset voltage typically around 2 mV.
6. Common-Mode Voltage Range: Can accept input voltages from the negative supply up to 1.5V below the positive supply.
7. Wide Temperature Range: Designed for operation in temperatures from -25°C to +85°C.
8. Power Dissipation: Low power consumption, making it efficient for battery-operated devices.
These features make the LM311M ideal for applications in voltage level detection, waveform shaping, and signal conditioning.

Package

The LM311M is typically packaged in an 8-lead mini-DIP (Dual In-line Package) format. This type of package is designed for easy mounting on circuit boards, providing a compact and reliable solution for integrating the comparator into electronic circuits.

Pinout

The LM311M is a dual comparator integrated circuit with a total of 8 pins. Here’s a concise breakdown of the pin functions:
1. Pin 1 (Non-Inverting Input - A): Positive input for comparator A.
2. Pin 2 (Inverting Input - A): Negative input for comparator A.
3. Pin 3 (Output - A): Output of comparator A.
4. Pin 4 (Ground): Connects to the system ground.
5. Pin 5 (Non-Inverting Input - B): Positive input for comparator B.
6. Pin 6 (Inverting Input - B): Negative input for comparator B.
7. Pin 7 (Output - B): Output of comparator B.
8. Pin 8 (VCC): Supply voltage (typically +15V to +30V).
The LM311M is commonly used in applications like voltage level detection, zero-crossing detectors, and pulse width modulation (PWM). Its open-collector output allows for easy interfacing with various logic levels.

Manufacturer

The LM311M is manufactured by Texas Instruments (TI), a well-known semiconductor company based in the United States. Texas Instruments specializes in the design and manufacture of a wide range of electronic components, including analog and digital semiconductors, microcontrollers, and embedded processors. Established in 1930, TI serves various industries such as automotive, industrial, communications, and consumer electronics. They are recognized for their innovation in analog technology and are a significant player in the global semiconductor market. The LM311M itself is a voltage comparator, widely used in various electronic applications for its performance and reliability.

Application

The LM311M is a voltage comparator widely used in various applications, including:
1. Zero-Crossing Detectors: Detects when a signal crosses zero voltage.
2. Pulse Width Modulation (PWM): Modulates signal widths for motor control.
3. Voltage Level Shifters: Converts different voltage levels for interfacing.
4. Comparator Circuits: Compares two voltages and outputs a high or low signal.
5. Signal Conditioning: Enhances signal quality in analog systems.
6. Hysteresis Circuits: Provides stable switching in noisy environments.
These applications leverage its fast response time and low power consumption.

Equivalent

Equivalent products to the LM311M chip include the LM393, LMV721, TLV3701, and the LTC6752. These devices are voltage comparators with similar functionality and can often be used interchangeably depending on specific application requirements such as voltage ranges, package types, and response times. Always consult the datasheets for detailed specifications before substitution.

Shipping

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DHL: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 2-5 business days.

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UPS: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 3-7 business days.

TNT: Shipping cost ranges from $25-$65 (0.5kg), with an estimated delivery time of 3-7 business days.

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Registered Air Mail: Shipping cost is $2-$4 (0.1kg), with an estimated delivery time of 5-20 business days.

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