MAX9042AEUA+

Overview

The MAX9042AEUA+ is a micropower, single-supply integrated circuit featuring two comparators and one precision voltage reference. It operates from a 2.5V to 5.5V supply with a typical quiescent current of 55µA. The device includes a 2.048V A-grade reference with ±0.4% initial accuracy and a 6ppm/°C temperature coefficient. Comparator inputs extend 250mV beyond the rails, offering rail-to-rail push-pull outputs capable of sourcing or sinking 8mA. Internal hysteresis is set at ±3mV, and propagation delay is typically 400ns.

Feature Summary

• Integrates dual low-power comparators with a precision laser-trimmed voltage reference in a compact package.
• Features rail-to-rail input and output stages that allow operation across the full supply range.
• Includes internal ±3mV hysteresis to ensure clean switching for slow-moving signals.
• Utilizes a unique output stage design that minimizes supply current surges during logic transitions.

Applications

• Precision battery management systems
• Window comparator circuits
• Infrared (IR) receivers
• Level translators

Procurement Notes

Verify the specific ordering suffix 'EUA' corresponds to the 8-pin µMAX package as listed in the official selector guide. Confirm the 'A' grade designation matches the required 0.4% initial accuracy specification. Ensure the component meets RoHS compliance standards indicated by the '+' suffix. Cross-reference the manufacturer's part number against current availability status before procurement.

Selection Notes

Select this component when a dual comparator solution with an integrated precision reference is required for space-constrained designs. The 2.048V reference output is suitable for interfacing with ADCs requiring this specific threshold. Consider the 55µA supply current for battery-operated applications where power efficiency is critical compared to standard comparator alternatives.

Part Context

This device belongs to the MAX9038–MAX9043 family of micropower comparators combined with precision references. It shares architectural similarities with the MAX9050 series but utilizes a lower 2.048V reference voltage instead of 2.500V. The MAX9042 variant specifically provides two independent comparator channels within the same package footprint as the single-channel MAX9041.

Replacement Considerations

The MAX9042BEUA+ serves as a direct functional replacement with B-grade reference accuracy. The MAX9042AESA offers identical electrical performance in an 8-SOIC package. Verify pin compatibility and thermal dissipation requirements when transitioning between the µMAX and SO packages.