MAX9040AEUK-T

Overview

The MAX9040AEUK-T is a micropower, single-supply analog comparator integrated with a precision voltage reference. It operates within a supply voltage range of 2.5V to 5.5V and consumes only 40μA of quiescent supply current. The device features rail-to-rail inputs and outputs, with an input common-mode voltage range extending 250mV beyond the supply rails. The integrated voltage reference provides a fixed output of 2.048V with A-grade initial accuracy of ±0.4% and a typical temperature coefficient of 6ppm/°C. Propagation delay is specified at 400ns.

Feature Summary

• Integrates a single low-power comparator with a precision voltage reference in a compact SOT23-5 package
• Features rail-to-rail inputs and push-pull outputs capable of sinking and sourcing up to 8mA
• Includes internal hysteresis to ensure clean output switching for slow-moving signals
• Utilizes a unique output stage design that limits supply current surges during switching

Applications

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

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when ordering. Confirm the 'A' grade designation corresponds to the required 0.4% initial accuracy and 6ppm/°C temperature coefficient specifications. Ensure the SOT23-5 package footprint matches the target PCB layout constraints.

Selection Notes

Select this component for applications requiring both signal comparison and a stable reference voltage in a minimal footprint. The low 40μA supply current makes it suitable for battery-operated devices. Consider the 400ns propagation delay for timing requirements and verify that the 2.048V reference output meets the system's threshold needs.

Part Context

This part belongs to the MAX9038–MAX9043 family of micropower comparators with integrated references. These devices are designed for low-voltage, single-supply operation. The MAX9040 specifically combines one comparator with a 2.048V reference, distinguishing it from variants offering different reference voltages or dual-comparator configurations.

Replacement Considerations

The MAX9040BEUK-T serves as a direct functional replacement, differing primarily in reference accuracy (1% vs 0.4%). Other family members like the MAX9038 or MAX9050 offer different reference voltages or output types.