MAX971ESA+T

Comparators Overview

The MAX971ESA+T is a single-channel, ultra-low-power analog comparator in an 8-pin SOIC package. 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 ±1% accuracy and programmable hysteresis via the HYST pin. Supply current is typically 4µA maximum over temperature. Propagation delay is 12µs with 10mV overdrive. The open-drain output sinks current to GND, supporting wire-OR configurations and level translation.

Comparators Feature Summary

• Ultra-low quiescent current consumption of 4µA maximum
• Integrated 1.182V precision bandgap voltage reference
• Programmable hysteresis using external resistors on the HYST pin
• Open-drain output with separate ground for level shifting

Comparators Applications

• Battery-powered threshold detectors
• Window comparators for undervoltage/overvoltage detection
• Level translators between bipolar and single-ended signals
• Oscillator circuits requiring low power

Comparators Procurement Notes

Verify the specific suffix +T indicates tape-and-reel packaging when sourcing. Confirm the E suffix corresponds to the -40°C to +85°C extended temperature range. Ensure the ESA designation matches the required 8-SOIC physical footprint. Cross-reference the manufacturer part number against official Analog Devices documentation to confirm authenticity and revision status before integration.

Comparators Selection Notes

Select this component for designs prioritizing minimal static power consumption in battery-operated systems. The integrated reference simplifies circuit design by eliminating external precision components. Verify that the open-drain output configuration aligns with the system's pull-up requirements. Consider the propagation delay characteristics if high-speed switching is necessary within the low-power constraint.

Comparators Part Context

This device belongs to the MAX971–MAX974 family of micropower comparators. It shares architectural similarities with the MAX981–MAX984 series but differs in reference accuracy and specific pinout configurations. The MAX971 variant specifically includes the internal reference and hysteresis control, distinguishing it from variants like the MAX972 which lack these features.

Comparators Replacement Considerations

The MAX931ESA+T is a documented alternative offering complementary CMOS/TTL outputs instead of open-drain. The MAX971CSA+ serves as a commercial grade replacement with a 0°C to +70°C operating range.