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CMP401GS

CMP401GS Description

The CMP401GS from Analog Devices Inc. is a general-purpose quad comparator designed for precision signal conditioning and fast response applications. Housed in a 16-SOIC package, this obsolete but robust IC operates on a ±5V dual supply and features CMOS/TTL-compatible outputs, making it versatile for mixed-signal systems. With a maximum propagation delay of 30ns, it ensures rapid decision-making in critical timing circuits. The device exhibits low input offset voltage (3mV max @ 5V) and minimal input bias current (3µA max @ 5V), enhancing accuracy in high-impedance environments. Its 60dB CMRR and PSRR provide excellent noise immunity, while 2mV hysteresis prevents chatter in noisy conditions.

CMP401GS Features

• Quad Comparator Configuration: Integrates four independent comparators, reducing board space and BOM complexity.
• Wide Output Compatibility: Supports CMOS and TTL logic levels for seamless interfacing.
• Low Power Consumption: Quiescent current as low as 1mA (typical) per comparator, ideal for battery-operated systems.
• High Noise Immunity: 60dB CMRR/PSRR and built-in hysteresis mitigate ground noise and supply fluctuations.
• Fast Response: 30ns max propagation delay suits high-speed applications like pulse-width modulation (PWM) and zero-crossing detection.
• Surface-Mount Design: 16-SOIC package (MSL 1) facilitates automated assembly and compact layouts.

CMP401GS Applications

The CMP401GS excels in:

• Precision Threshold Detection: Used in window comparators for overvoltage/undervoltage protection in power supplies.
• Signal Conditioning: Interfaces with sensors (e.g., temperature, current) in industrial control systems.
• High-Speed Switching: Enables fast edge detection in communication protocols and clock recovery circuits.
• Battery Management: Monitors cell voltages in portable devices due to its low quiescent current.
• Automotive Systems: Robust noise immunity suits ECU signal processing despite its obsolete status.

Conclusion of CMP401GS

While marked obsolete, the CMP401GS remains a reliable choice for designers needing high-speed, low-power comparators with superior noise rejection. Its quad-channel integration, wide logic compatibility, and precision specs make it ideal for legacy or niche applications where modern replacements may not meet cost or performance criteria. Engineers should evaluate alternative Analog Devices offerings for long-term availability but can leverage this IC’s proven performance in critical analog signal chains.