STMicroelectronics

LM239AD

LM239AD Description

The LM239AD is a general-purpose comparator IC designed by STMicroelectronics. It features four independent comparators housed in a surface-mount package, making it suitable for a variety of applications requiring compact and efficient design. The LM239AD operates over a wide supply voltage range of 2V to 32V for single supply and ±1V to ±16V for dual supply, providing flexibility in power requirements. It has a low quiescent current of up to 2mA, which is ideal for low-power applications. The input bias current is also minimal at 0.1µA @ 5V, ensuring high accuracy and stability. The output current capability is 16mA @ 5V, allowing it to drive various loads effectively. The LM239AD has a maximum input offset voltage of 2mV @ 30V, contributing to its precision in signal comparison. It is REACH unaffected and RoHS3 compliant, ensuring environmental safety and regulatory compliance. The moisture sensitivity level is MSL 1 (unlimited), making it suitable for a wide range of manufacturing environments. The LM239AD is available in a tube package, facilitating easy handling and integration into electronic circuits.

LM239AD Features

• Wide Operating Voltage Range: The LM239AD operates from 2V to 32V for single supply and ±1V to ±16V for dual supply, making it versatile for different power supply configurations.
• Low Quiescent Current: With a maximum quiescent current of 2mA, the LM239AD is suitable for low-power applications, reducing overall power consumption.
• Low Input Bias Current: The maximum input bias current of 0.1µA @ 5V ensures high accuracy and stability in signal comparison.
• High Output Current Capability: The LM239AD can provide up to 16mA @ 5V, allowing it to drive various loads effectively.
• Low Input Offset Voltage: The maximum input offset voltage of 2mV @ 30V contributes to its precision in signal comparison.
• Environmental Compliance: The LM239AD is REACH unaffected and RoHS3 compliant, ensuring environmental safety and regulatory compliance.
• Moisture Sensitivity Level: MSL 1 (unlimited) makes it suitable for a wide range of manufacturing environments.
• Surface-Mount Package: The LM239AD is available in a surface-mount package, facilitating easy integration into compact electronic designs.

LM239AD Applications

The LM239AD is ideal for a variety of applications where precision signal comparison and low power consumption are critical. Some specific use cases include:

• Analog-to-Digital Conversion: The LM239AD can be used in analog-to-digital converters to compare analog signals against reference voltages, ensuring accurate digital output.
• Level Shifting: It can be employed in level-shifting circuits to convert signal levels between different voltage domains.
• Window Detectors: The LM239AD can be used to design window detectors for monitoring and controlling signals within a specific voltage range.
• Battery Monitoring: Its low quiescent current and wide operating voltage range make it suitable for battery monitoring applications, where power efficiency is crucial.
• Signal Processing: The LM239AD can be used in signal processing circuits to compare and condition signals for further processing.

Conclusion of LM239AD

The LM239AD is a versatile and efficient general-purpose comparator IC from STMicroelectronics, offering a wide range of technical specifications and performance benefits. Its low quiescent current, low input bias current, and high output current capability make it suitable for a variety of applications, including analog-to-digital conversion, level shifting, window detection, battery monitoring, and signal processing. The LM239AD's environmental compliance and surface-mount package further enhance its appeal for modern electronic designs. While the product is now obsolete, its unique features and advantages continue to make it a valuable component in many existing and legacy systems.