STMicroelectronics

LM319N

LM319N Description

The LM319N is a general-purpose comparator IC designed for a wide range of applications. Manufactured by STMicroelectronics, this device is housed in a through-hole package and is available in a tube format. Despite being marked as obsolete, the LM319N remains a reliable choice for many existing systems and designs. It is REACH unaffected and ROHS3 compliant, ensuring it meets environmental and regulatory standards.

The LM319N features two independent comparators, each with a maximum input bias current of 1µA at ±15V and an input offset voltage of up to 8mV at ±15V. It operates within a supply voltage range of 5V to 30V for single supply and ±2.5V to ±15V for dual supply configurations. The device has a quiescent current of up to 12.5mA, making it suitable for applications where power consumption is a consideration. The LM319N is rated for an operating temperature range of 0°C to 70°C, making it ideal for use in moderate environmental conditions.

LM319N Features

• General-Purpose Comparator: The LM319N is designed for a broad range of applications, offering versatility and reliability.
• Dual Comparators: The device includes two independent comparators, allowing for multiple signal comparisons within a single package.
• Low Input Bias Current: With a maximum input bias current of 1µA at ±15V, the LM319N ensures high input impedance, reducing the load on the signal source.
• Low Input Offset Voltage: A maximum input offset voltage of 8mV at ±15V ensures accurate comparisons and minimal error in signal processing.
• Wide Operating Voltage Range: The LM319N operates from 5V to 30V for single supply and ±2.5V to ±15V for dual supply, providing flexibility in power supply options.
• Low Quiescent Current: The maximum quiescent current of 12.5mA makes the LM319N suitable for applications where power efficiency is important.
• Moisture Sensitivity Level (MSL) 1: The device is rated for unlimited exposure to moisture, ensuring reliability in various environmental conditions.
• Through-Hole Mounting: The through-hole package type facilitates easy integration into printed circuit boards and ensures robust mechanical stability.

LM319N Applications

The LM319N is well-suited for a variety of applications due to its general-purpose design and robust performance characteristics. Some specific use cases include:

• Signal Processing: Ideal for comparing analog signals in various electronic systems, such as audio processing, sensor interfacing, and control systems.
• Control Circuits: The LM319N can be used in feedback loops and control circuits to monitor and adjust system parameters based on input signals.
• Power Management: The comparator can be employed in power supply circuits to monitor voltage levels and ensure stable operation.
• Industrial Automation: Suitable for use in industrial control systems where precise signal comparison is required for process control and monitoring.
• Consumer Electronics: The LM319N can be found in consumer electronics for tasks such as signal level detection and control in devices like amplifiers and power supplies.

Conclusion of LM319N

The LM319N, despite being marked as obsolete, remains a valuable component for many applications due to its reliable performance and versatile design. Its low input bias current, low input offset voltage, and wide operating voltage range make it an excellent choice for precise signal comparison and control. The through-hole mounting and moisture sensitivity level 1 rating ensure mechanical stability and reliability in various environments. While newer alternatives may offer enhanced features, the LM319N continues to provide robust performance for existing systems and designs.