STMicroelectronics

LM2903HD

LM2903HD Description

The LM2903HD is a general-purpose comparator IC designed by STMicroelectronics, featuring two independent comparators in an 8-pin SOIC package. This device is ideal for applications requiring high performance and reliability in a compact form factor. Despite being marked as obsolete, the LM2903HD remains a robust choice for various electronic designs due to its wide operating voltage range, low quiescent current, and high output current capability. The LM2903HD is REACH unaffected and RoHS3 compliant, ensuring it meets environmental and safety standards.

LM2903HD Features

• High Output Current: The LM2903HD can deliver a typical output current of 16mA at 5V, making it suitable for driving moderate loads without requiring additional amplification stages.
• Low Quiescent Current: With a maximum quiescent current of 2.5mA, the LM2903HD is energy-efficient, making it ideal for battery-powered or low-power consumption applications.
• Wide Operating Voltage Range: The device operates from a single supply voltage of 2V to 36V or dual supplies of ±1V to ±18V, providing flexibility in power supply design.
• Low Input Offset Voltage: The maximum input offset voltage of 7mV at 30V ensures high accuracy and precision in signal comparison.
• Low Input Bias Current: The maximum input bias current of 0.25µA at 5V minimizes the loading effect on the input signal sources.
• Surface Mount Package: The LM2903HD is available in a surface mount package, facilitating easy integration into modern PCB designs and enabling compact and reliable assemblies.
• Moisture Sensitivity Level: With an MSL rating of 3 (168 hours), the LM2903HD is suitable for use in environments with moderate humidity levels, ensuring long-term reliability.

LM2903HD Applications

The LM2903HD is versatile and can be used in a wide range of applications, including:

• Signal Processing: Ideal for level detection, window comparators, and signal conditioning in analog circuits.
• Power Management: Suitable for voltage monitoring, battery level detection, and over/under-voltage protection circuits.
• Control Systems: Can be used in feedback loops, motor control, and other control systems requiring precise signal comparison.
• Consumer Electronics: Applicable in devices such as smartphones, tablets, and portable media players for various control and monitoring functions.
• Industrial Automation: Useful in sensors, PLCs, and other industrial control systems for precise signal processing and control.

Conclusion of LM2903HD

The LM2903HD, despite being marked as obsolete, remains a reliable and versatile comparator IC for a variety of applications. Its wide operating voltage range, low quiescent current, and high output current capability make it a robust choice for designers seeking a general-purpose comparator. The device's compliance with REACH and RoHS3 standards ensures it meets environmental and safety requirements. The LM2903HD is particularly well-suited for applications requiring high precision and reliability in a compact surface mount package. For those looking for a proven and efficient comparator solution, the LM2903HD is a solid option.