MAX981ESA+T

Comparators Overview

The MAX981ESA+T is a single-channel, ultra-low-power analog comparator manufactured by Analog Devices (Maxim Integrated). It operates from a single 2.5V to 11V supply or dual ±1.25V to ±5.5V supplies. The device features an internal 1.182V voltage reference with ±2% accuracy and includes a dedicated HYST pin for programmable hysteresis implementation using external resistors. It utilizes open-drain outputs that permit wire-ORed configurations and level translation. The component is housed in an 8-pin µMAX package and supports operation across the commercial temperature range of 0°C to +70°C.

Comparators Feature Summary

• Ultra-low quiescent current consumption suitable for battery-powered systems
• Integrated internal bandgap voltage reference with programmable hysteresis capability via the HYST pin
• Open-drain output configuration enabling wire-OR connections and level-shifting applications

Comparators Applications

• Battery-powered threshold detectors
• Window comparators for voltage monitoring
• Level translators between different logic domains
• Oscillator circuits requiring low power consumption

Comparators Procurement Notes

Verify the specific suffix 'ESA' corresponds to the SOIC-8 package variant rather than the µMAX package indicated in some distributor listings. Confirm the temperature grade matches the required operational environment, as the 'E' suffix typically denotes extended range (-40°C to +85°C) while 'C' denotes commercial range (0°C to +70°C). Ensure the '+T' indicates tape-and-reel packaging if automated assembly is planned. Cross-reference the manufacturer's latest ordering guide to confirm current availability status.

Comparators Selection Notes

Select this component when system design requires minimal static power draw combined with precise voltage referencing. The integrated reference eliminates the need for external precision components, reducing board space. The open-drain output allows flexible interfacing with various logic families. Consider the propagation delay characteristics relative to signal speed requirements. Verify input common-mode voltage ranges align with the application's signal levels.

Comparators Part Context

This part belongs to the MAX971–MAX984 family of micropower comparators. The MAX981 variant specifically provides a single comparator channel with an internal reference and hysteresis control. It shares architectural similarities with the MAX971 but differs in reference accuracy specifications. The family is designed for low-voltage, single-supply applications where power efficiency is critical.

Comparators Replacement Considerations

The MAX971ESA+T serves as a direct functional replacement with tighter reference accuracy. Other single-channel comparators from the same family may require pinout verification. Ensure any substitute maintains the open-drain output topology and compatible supply voltage ranges.