MAX981CUA

Comparators Overview

The MAX981CUA is a single micropower comparator in an 8-pin µMAX package, operating from 2.5V to 11V single supplies or ±1.25V to ±5.5V dual supplies. It features a 1.182V ±2% internal reference and programmable hysteresis via the HYST pin. Supply current is typically 3.2µA at 25°C. Input voltage ranges from V- to (V+ - 1.3V). The open-drain output sinks to GND with a separate ground pin, supporting wire-OR configurations and level translation up to 11V.

Comparators Feature Summary

• Ultra-low quiescent current consumption for battery-powered applications
• Internal 1.182V precision voltage reference with programmable hysteresis control
• Open-drain output with separate ground pin for bipolar-to-single-ended conversion

Comparators Applications

• Battery-powered threshold detectors
• Window comparators for undervoltage/overvoltage monitoring
• Level translators between bipolar and single-ended logic domains

Comparators Procurement Notes

Verify the suffix 'CUA' confirms the commercial temperature range of 0°C to +70°C and the 8-pin µMAX package type. Ensure the specific lot date code meets project requirements. Confirm that the internal reference accuracy of ±2% aligns with system tolerance needs. Check for any specific handling instructions regarding the micro-package during assembly.

Comparators Selection Notes

Select this device when low power consumption is critical alongside precise threshold detection. The integrated reference simplifies design by removing external components. Use the HYST pin for noise immunity without complex feedback networks. Ensure the input signal stays within the common-mode range relative to the supply rails. Consider the open-drain output requirement for pull-up resistor selection in the final circuit design.

Comparators Part Context

This component belongs to the MAX971–MAX984 family of ultra-low-power comparators. It shares architectural similarities with the MAX971 but differs in reference accuracy and package options. The MAX981 variant specifically offers a 2% reference tolerance compared to the 1% found in the MAX971 series. It complements other Maxim Integrated analog switches and signal chain components.

Comparators Replacement Considerations

The MAX971CUA serves as a direct functional substitute if higher reference accuracy (±1%) is acceptable. Verify that the alternative part supports the same 8-pin µMAX footprint and electrical characteristics. Ensure the replacement maintains the open-drain output configuration and supply voltage compatibility.