STMicroelectronics

LM311N

LM311N Description

The LM311N is a general-purpose comparator designed by STMicroelectronics, a leading manufacturer in the semiconductor industry. This through-hole mounted IC is housed in a tube package and features an 8-pin DIP configuration. Despite being marked as obsolete, the LM311N remains a reliable choice for various applications due to its robust performance and compliance with industry standards.

LM311N Features

• High Output Current: The LM311N can deliver a typical output current of 50mA, making it suitable for driving a variety of loads without the need for additional amplification stages.
• Low Quiescent Current: With a maximum quiescent current of 7.5mA, the LM311N is energy-efficient, which is beneficial for battery-operated or low-power applications.
• Wide Operating Temperature Range: The LM311N operates reliably within a temperature range of 0°C to 70°C, ensuring stable performance in various environmental conditions.
• Low Input Offset Voltage: The maximum input offset voltage is 7.5mV at ±15V, which contributes to high accuracy and precision in signal comparison.
• Low Input Bias Current: The maximum input bias current is 0.25µA at ±15V, minimizing the impact on the input signal source.
• Wide Supply Voltage Range: The LM311N supports a wide supply voltage range of 5V to 30V for single supply and ±2.5V to ±15V for dual supply, providing flexibility in power supply options.
• Compliance and Safety: The LM311N is REACH unaffected and RoHS3 compliant, ensuring it meets environmental and safety standards.
• Moisture Sensitivity Level: With an MSL of 1 (Unlimited), the LM311N is suitable for use in environments with varying humidity levels without the need for special handling.

LM311N Applications

The LM311N is ideal for a wide range of applications due to its general-purpose design and robust performance. Some specific use cases include:

• Signal Processing: The LM311N can be used in signal processing circuits to compare input signals and generate output signals based on predefined thresholds.
• Level Shifting: It is effective in level-shifting applications where the input signal voltage levels need to be converted to different output voltage levels.
• Analog-to-Digital Conversion: The comparator can be used in ADC circuits to convert analog signals into digital form by comparing the analog signal with a reference voltage.
• Power Supply Monitoring: The LM311N can monitor power supply voltages and generate alerts or control signals when the voltage levels fall outside the desired range.
• Oscillator Circuits: It can be used in oscillator circuits to generate periodic signals by comparing the feedback signal with a reference voltage.

Conclusion of LM311N

The LM311N, despite being obsolete, remains a versatile and reliable comparator suitable for a variety of applications. Its high output current, low quiescent current, and wide operating temperature range make it a robust choice for general-purpose use. The LM311N's compliance with environmental and safety standards ensures it meets the requirements of modern electronics design. Whether used in signal processing, level shifting, or power supply monitoring, the LM311N offers a reliable and efficient solution for engineers and designers in the electronics industry.