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LM2901DR

LM2901DR Description

The LM2901DR by ROHM Semiconductor is a general-purpose quad comparator housed in a 14-pin SOIC package, designed for surface-mount applications. This obsolete yet reliable IC operates over a wide supply voltage range (2V to 36V single supply, ±1V to 18V dual supply), making it versatile for various analog signal-processing tasks. With a low input bias current (max 0.25µA @ 5V) and minimal output current (16nA @ 5V), it ensures precision in low-power designs. The max quiescent current of 2mA and input offset voltage of 7mV @ 5V further enhance its efficiency in battery-operated and industrial systems.

LM2901DR Features

• Quad Comparator Configuration: Four independent comparators in a single package, reducing board space and cost.
• Wide Voltage Range: Supports 2V–36V (single supply) and ±1V–18V (dual supply), ideal for mixed-voltage systems.
• Low Power Consumption: Quiescent current ≤2mA and ultra-low output leakage (16nA) extend battery life.
• High Precision: 7mV max input offset voltage ensures accurate threshold detection.
• Robust Packaging: Tape & Reel (TR) for automated assembly, MSL 1 (Unlimited) for long shelf life.
• Compliance: ROHS3 and REACH Unaffected, meeting environmental standards.

LM2901DR Applications

• Battery-Powered Devices: Portable electronics, sensors, and energy harvesters benefit from its low-power operation.
• Industrial Control Systems: Voltage monitoring, window comparators, and motor drive circuits due to wide supply range.
• Automotive Electronics: Robust performance in 12V/24V systems (e.g., overvoltage protection, PWM control).
• Consumer Electronics: Signal conditioning in audio equipment, power management ICs.

Conclusion of LM2901DR

The LM2901DR excels in cost-sensitive, space-constrained designs requiring multiple precision comparators. Its wide voltage range, low power draw, and high accuracy make it a legacy choice for industrial, automotive, and portable applications. While marked obsolete, its ROHS3 compliance and reliability ensure continued suitability for existing designs. Engineers seeking a proven quad comparator with low leakage and robust performance will find the LM2901DR a pragmatic solution.