The LM2903DR is a dual high-voltage comparator IC from Texas Instruments (TI), designed for applications requiring robust analog signal comparison in harsh environments. It operates across a wide supply voltage range (2V to 36V) and supports single-supply or split-supply configurations, making it ideal for battery management, overvoltage protection, and industrial control systems. Its low input bias current and high input impedance enable accurate signal detection even in high-impedance circuits.

Key Features

• Wide supply range: Functions reliably from 2V to 36V, accommodating diverse power systems.
• Dual channels: Two independent comparators in a compact SOIC or PDIP package.
• High input voltage tolerance: Handles inputs up to ±15V relative to the supply rails.
• Low power consumption: 1.5 mA per channel (typical), suitable for battery-powered devices.
• Built-in hysteresis capability: External resistors can be added to create迟滞 (hysteresis) for noise immunity and stable switching (e.g., in battery voltage monitoring).
• Fast response: Propagation delay of 45 ns (typical) for real-time signal detection.
• Wide temperature range: Operates from -40°C to +125°C, ideal for industrial and automotive environments.

Common uses include battery charge/discharge control, overvoltage/undervoltage protection, industrial sensor interfaces, motor control systems, and consumer electronics. Its high-voltage tolerance and hysteresis capability make it suitable for precision threshold detection in noisy environments, such as power management circuits or electronic safety systems.

The LM2903DR combines high voltage flexibility, low power operation, and reliability to address demanding analog comparison tasks. Its ability to implement hysteresis via external components and operate across wide voltage/temperature ranges positions it as a versatile solution for industrial, automotive, and battery management applications requiring precise and noise-resistant signal processing.