MAX971ESA

Comparators Overview

The MAX971ESA is a single-channel analog comparator from the Maxim Integrated family, housed in an 8-pin SOIC package. It operates on a single supply voltage ranging from 2.5V to 11V or dual supplies of ±1.25V to ±5.5V. The device features ultra-low quiescent current consumption of less than 4µA over temperature and includes an internal 1.182V precision voltage reference with ±1% accuracy. It offers open-drain outputs capable of wire-OR configurations and supports programmable hysteresis via the HYST pin. The input common-mode range extends from the negative rail to within 1.3V of the positive rail.

Comparators Feature Summary

• Ultra-low power consumption with supply current under 4µA
• Integrated 1.182V bandgap voltage reference with ±1% accuracy
• Open-drain output allows for wire-ORed logic configurations
• Programmable hysteresis using external resistors connected to the HYST pin

Comparators Applications

• Battery-powered threshold detectors
• Window comparators for voltage monitoring
• Level translators between bipolar and single-ended signals
• Oscillator circuits requiring low power draw

Comparators Procurement Notes

Verify the specific suffix 'E' indicates the extended industrial temperature range (-40°C to +85°C) rather than the commercial grade. Confirm the 'SA' suffix corresponds to the standard 8-pin SOIC plastic package. Check current availability status as this component may be subject to limited supply or end-of-life restrictions depending on the manufacturer's production schedule.

Comparators Selection Notes

Select this part when designing systems that require minimal static power consumption from battery sources. The integrated reference simplifies circuit design by eliminating the need for external voltage references. Ensure the application utilizes the open-drain output correctly with appropriate pull-up resistors. Verify that the required propagation delay and noise margins are compatible with the signal characteristics of the input source.

Comparators Part Context

This component belongs to the MAX971–MAX974 and MAX981–MAX984 series of low-voltage comparators. These devices are designed for applications where power conservation is critical. The MAX971 variant specifically provides a single comparator with an internal reference and hysteresis capability, distinguishing it from variants without references or those with multiple channels.

Comparators Replacement Considerations

Public confirmed substitute part numbers: TSM971ESA+T (Silicon Labs). Note that while functionally similar, verify exact electrical parameter matches such as reference accuracy and hysteresis implementation before substitution.