MAX9141ESA

Overview

The MAX9141ESA is a single-channel high-speed analog comparator from the MAX9140 family, manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single supply voltage ranging from 2.7V to 5.5V with a typical supply current of 165µA at 3V and 200µA at 5V per comparator. The device features a propagation delay of 40ns (at 10mV overdrive) and a low input offset voltage of 2mV typical. It includes rail-to-rail inputs, internal hysteresis of 1.5mV, and CMOS/TTL-compatible outputs that swing within 300mV of the rails. Unique to this model are an output latch controlled by the LE pin and a shutdown function via the SHDN pin.

Feature Summary

• Features an integrated output latch for storing comparison results and a dedicated shutdown mode for power reduction.
• Provides rail-to-rail input voltage range extending beyond both power-supply rails without external components.
• Includes fixed internal hysteresis to ensure clean switching and prevent oscillation on slow-moving signals.
• Delivers fast response with 40ns propagation delay while maintaining low power consumption optimized for 3V and 5V systems.

Applications

• Threshold detectors and discriminators
• Zero-crossing detectors
• Sampling circuits
• Line receivers

Procurement Notes

Verify the specific ordering suffix to confirm package type and RoHS compliance status. Ensure the lead-free designation matches project requirements. Confirm availability through authorized distributors as stock levels fluctuate. Check for automotive grade variants if extended temperature ranges or AEC-Q100 qualification are required for the application environment.

Selection Notes

Select the MAX9141ESA when a single comparator with latch functionality and shutdown control is needed. It serves as a direct upgrade to older industry-standard comparators like the MAX941, offering higher speed and lower power. Consider the SO-8 package for board space constraints compared to larger packages. Verify that the 40ns delay meets system timing requirements and that the 1.5mV internal hysteresis is sufficient for noise immunity.

Part Context

The MAX9141ESA belongs to the MAX9140/MAX9141/MAX9142/MAX9144 family of high-speed, low-power, rail-to-rail single-supply comparators. This family is designed for portable equipment and battery-powered systems requiring fast switching with minimal power draw. The MAX9141 specifically provides single-channel configuration with additional control pins for latching and shutdown, distinguishing it from the basic MAX9140.

Replacement Considerations

The datasheet identifies the MAX941, MAX942, and MAX944 as industry-standard comparators that the MAX914x series upgrades. Designers replacing these legacy parts should verify that the new latch and shutdown features do not conflict with existing logic states.