MAX9042AEUA

Overview

The MAX9042AEUA is a micropower, single-supply comparator integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It features two comparators and one precision voltage reference within an 8-pin µMAX package. The device operates on a supply voltage range of 2.5V to 5.5V with a typical quiescent supply current of 55µA at 2.7V. The internal voltage reference provides a fixed output of 2.048V with A-grade initial accuracy of ±0.4% and a temperature coefficient of 6ppm/°C. Comparator inputs support rail-to-rail operation extending 250mV beyond the supply rails, while outputs utilize push-pull stages capable of sourcing and sinking up to 8mA.

Feature Summary

• Integrates dual comparators with a precision voltage reference in a compact µMAX package
• Features rail-to-rail input and output stages for wide signal compatibility
• Includes internal hysteresis to ensure clean switching transitions
• Utilizes a unique output stage design to minimize supply current surges during switching

Applications

• Precision battery management systems
• Window comparator circuits
• IR receivers
• Level translators
• Digital line receivers

Procurement Notes

Verify the specific suffix 'EUA' corresponds to the 8-pin µMAX package configuration required for your board layout. Confirm that the 'A' grade designation meets the necessary initial accuracy and temperature coefficient specifications for your application. Ensure the component is sourced from authorized distributors to guarantee authenticity and traceability.

Selection Notes

Select this component when a dual-channel comparator with an integrated precision reference is required in a small surface-mount package. It is suitable for applications demanding low power consumption and rail-to-rail signal handling. Consider alternative packages such as SOIC or SOT23 if the µMAX footprint does not match your PCB design constraints.

Part Context

The MAX9042AEUA belongs to the MAX9038–MAX9043 and MAX9050–MAX9053 family of micropower comparators. This series combines low-power comparators with precision voltage references, designed for both 3V and 5V systems. The MAX9042 specifically houses dual comparators sharing a single reference, offering a balance between channel count and power efficiency.

Replacement Considerations

The MAX9042BEUA serves as a direct functional replacement with B-grade reference accuracy. Other variants within the MAX904x series may be considered if different pin counts or package types are acceptable.