Specifications
| Attribute | Value |
| Package | Tape & Reel (TR),Cut Tape (CT) |
| ProductStatus | Active |
| Type | General Purpose |
| NumberofElements | 1 |
| OutputType | MOS, Open-Collector, Open-Emitter, TTL |
| Voltage-SupplySingle/Dual(±) | 3.5V ~ 30V, ±1.75V ~ 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 LM311DR is a voltage comparator integrated circuit commonly used in electronic projects. It is designed to compare two input voltages and provide a digital output indicating which input is higher. The "DR" suffix indicates the device is packaged in an SOIC-8 (Small Outline Integrated Circuit) format, suitable for surface-mount applications.
Key features of the LM311DR include a wide supply voltage range, typically from 3V to 32V, making it versatile for various applications. It can operate with a single or dual power supply. The device offers fast response times, making it suitable for high-speed applications. It also includes an output stage that can be used for TTL and MOS logic levels, providing flexibility in interfacing with other digital circuits.
The LM311DR's input common-mode voltage range includes ground, enabling it to compare signals close to the negative supply rail. This makes it useful in level-shifting applications and zero-crossing detectors. Additionally, it is equipped with features like strobe capability and a wide temperature range, enhancing its usability in industrial and consumer electronics.
Key features of the LM311DR include a wide supply voltage range, typically from 3V to 32V, making it versatile for various applications. It can operate with a single or dual power supply. The device offers fast response times, making it suitable for high-speed applications. It also includes an output stage that can be used for TTL and MOS logic levels, providing flexibility in interfacing with other digital circuits.
The LM311DR's input common-mode voltage range includes ground, enabling it to compare signals close to the negative supply rail. This makes it useful in level-shifting applications and zero-crossing detectors. Additionally, it is equipped with features like strobe capability and a wide temperature range, enhancing its usability in industrial and consumer electronics.
Equivalent
The LM311DR is a voltage comparator. Equivalent products include the LM311PLM311N(Texas Instruments), UA311 (Texas Instruments), LM311D(Texas Instruments), and LM393 (dual comparator, with similar functionality but dual channels). Ensure pin configurations are compatible when selecting a replacement, as packages and manufacturer specifications may vary. Always verify the datasheet for exact electrical and performance characteristics.
Features
The LM311DR is a voltage comparator with several key features:
1. Wide Supply Voltage Range: It operates between a single 5V supply up to dual ±15V supplies.
2. Fast Response Time: The device offers a fast response time of approximately 200 nanoseconds, making it suitable for high-speed applications.
3. High Output Drive Capability: It can drive TTL, DTL, and MOS logic levels, providing flexibility in interfacing with different systems.
4. Low Input Offset Voltage: The LM311DR has a low input offset voltage, enhancing precision in comparison tasks.
5. Adjustable Hysteresis: It allows for hysteresis to be introduced into the system to prevent noise from causing false switching.
6. Strobe Capability: A strobe pin is available to disable the comparator output when required.
7. Wide Common-Mode Range: The input common-mode range includes the negative supply, enhancing versatility in various applications.
These features make the LM311DR suitable for use in zero-crossing detectors, voltage level shifters, oscillators, and a variety of other applications requiring fast and reliable voltage comparison.
1. Wide Supply Voltage Range: It operates between a single 5V supply up to dual ±15V supplies.
2. Fast Response Time: The device offers a fast response time of approximately 200 nanoseconds, making it suitable for high-speed applications.
3. High Output Drive Capability: It can drive TTL, DTL, and MOS logic levels, providing flexibility in interfacing with different systems.
4. Low Input Offset Voltage: The LM311DR has a low input offset voltage, enhancing precision in comparison tasks.
5. Adjustable Hysteresis: It allows for hysteresis to be introduced into the system to prevent noise from causing false switching.
6. Strobe Capability: A strobe pin is available to disable the comparator output when required.
7. Wide Common-Mode Range: The input common-mode range includes the negative supply, enhancing versatility in various applications.
These features make the LM311DR suitable for use in zero-crossing detectors, voltage level shifters, oscillators, and a variety of other applications requiring fast and reliable voltage comparison.
Pinout
The LM311DR is a voltage comparator integrated circuit. It comes in an 8-pin SOIC (Small Outline Integrated Circuit) package. The pin functions are as follows:
1. GND: Ground connection.
2. Non-inverting Input (+IN): The positive input terminal for the comparator.
3. Inverting Input (-IN): The negative input terminal for the comparator.
4. VCC-: The negative supply voltage terminal.
5. Balance: Used for offset balancing.
6. Balance/Strobe: For offset balancing or strobing the output.
7. Output: The output terminal, which goes high or low based on input comparison.
8. VCC+: The positive supply voltage terminal.
The LM311DR compares the voltages at the non-inverting and inverting inputs and provides a digital output indicating which input is higher. It can operate over a wide range of supply voltages and can drive loads up to 50V.
1. GND: Ground connection.
2. Non-inverting Input (+IN): The positive input terminal for the comparator.
3. Inverting Input (-IN): The negative input terminal for the comparator.
4. VCC-: The negative supply voltage terminal.
5. Balance: Used for offset balancing.
6. Balance/Strobe: For offset balancing or strobing the output.
7. Output: The output terminal, which goes high or low based on input comparison.
8. VCC+: The positive supply voltage terminal.
The LM311DR compares the voltages at the non-inverting and inverting inputs and provides a digital output indicating which input is higher. It can operate over a wide range of supply voltages and can drive loads up to 50V.
Manufacturer
The LM311DR is manufactured by Texas Instruments. Texas Instruments (TI) is an American technology company that designs and manufactures semiconductors and various integrated circuits. The company is a major player in the electronics industry and serves a wide range of markets, including automotive, industrial, personal electronics, and communications equipment. TI is known for its innovation and production of analog chips, embedded processors, and digital light processing (DLP) technology.
Application
The LM311DR is a versatile voltage comparator used in various applications. It is commonly employed in zero-crossing detectors, where it identifies the transition of AC signals through zero voltage. It also serves in pulse-width modulation (PWM) circuits, enhancing power supply and motor control systems. The device is utilized in level shifting, converting signals between different voltage levels, and in oscillator circuits for frequency generation. Additionally, the LM311DR is used in signal conditioning, analog-to-digital converters, and threshold detection applications in industrial and instrumentation systems. Its fast response time and ability to operate with single or dual power supplies make it suitable for a wide range of electronic designs.
Package
The LM311DR is a voltage comparator integrated circuit housed in a SOIC-8 (Small Outline Integrated Circuit) package. This package type is designed for surface-mount technology, featuring eight pins and a small form factor suitable for compact electronic applications.
