MAX9041AESA

Overview

The MAX9041AESA is a micropower, single-supply comparator and precision voltage reference IC manufactured by Analog Devices Inc./Maxim Integrated. It operates from a 2.5V to 5.5V supply with a quiescent current of 40µA at 2.7V and 45µA at 5.0V. The device features a single comparator with rail-to-rail inputs and outputs, capable of sinking and sourcing up to 8mA. It includes an internal ±3mV hysteresis and offers a propagation delay of 400ns. The integrated voltage reference provides a fixed output of 2.048V with A grade initial accuracy of ±0.4% and a temperature coefficient of 6ppm/°C. It functions within a -40°C to +85°C range in an 8-pin SO package.

Feature Summary

• Combines a low-power comparator with a precision voltage reference in a single compact package
• Features rail-to-rail input and output stages for maximum dynamic range
• Includes internal hysteresis to ensure clean switching on slow-moving signals
• Unique output stage design minimizes supply current surges during transitions

Applications

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

Procurement Notes

Verify the specific ordering suffix and grade (A or B) when sourcing, as these determine initial accuracy and temperature coefficient specifications. Confirm the package type matches the required footprint, as this component family is available in multiple form factors including SOT23 and UCSP. Ensure the selected variant supports the intended supply voltage range and operating temperature requirements for the target application environment.

Selection Notes

Select the MAX9041AESA when a single comparator with a 2.048V reference is required in an 8-pin SO package. Choose the A grade for applications demanding higher initial accuracy and lower temperature drift compared to the B grade. Consider this part for battery-operated designs due to its ultra-low quiescent current consumption. Verify that the 400ns propagation delay meets the timing constraints of the signal processing chain.

Part Context

This component belongs to the MAX9038–MAX9043 and MAX9050–MAX9053 series of micropower comparators with integrated references. The MAX9041 specifically integrates one comparator and a 2.048V reference. Unlike the MAX9038 which has an open-drain output, the MAX9041 utilizes a push-pull output stage. It shares the same low-power architecture and rail-to-rail capabilities as other members of the family but differs in pin count and reference voltage configuration.

Replacement Considerations

Direct substitutes within the same family include the MAX9041BEUT+T (SOT23-6) and MAX9041AEUK+T (SOT23-5). Cross-package equivalents such as the MAX9041AESA are functionally identical regarding electrical performance. When replacing, ensure the new variant maintains the 2.048V reference output and compatible supply voltage range.