MAX951EUA

Overview

The MAX951EUA is an ultra-low-power, single-supply integrated circuit combining a micro-power operational amplifier, comparator, and precision reference within an 8-pin μMAX package. It operates from a supply voltage range of 2.7V to 7V with a typical supply current of 7μA. The device features rail-to-rail outputs, ground-referenced inputs, and internal hysteresis for clean switching. Designed for battery-powered applications, it offers unity-gain stability and excellent DC characteristics across the industrial temperature range.

Feature Summary

• Combines op amp, comparator, and reference in compact 8-pin μMAX package
• Ultra-low 7μA typical supply current for extended battery life
• Rail-to-rail output swing with ground-referenced input capability
• Internal ±3mV comparator hysteresis ensures noise immunity

Applications

• Battery-powered portable instruments and terminals
• Smart card interfaces and low-frequency local-area alarms
• Photodiode preamplifiers and infrared receiver front ends
• Smoke detectors and safety sensor signal conditioning

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm that the specific ordering suffix corresponds to the required package type and temperature rating. Ensure compliance with relevant environmental standards before integration into final designs.

Selection Notes

Select this device when system design requires minimal quiescent current alongside precise signal comparison and amplification. The integrated reference eliminates external components, reducing board space. Verify that the 2.7V minimum supply voltage aligns with the target battery chemistry throughout its discharge cycle.

Part Context

This component belongs to the MAX951–MAX954 family of mixed-signal interface ICs. It represents a specialized solution for power-constrained environments where multiple analog functions must be consolidated into a single footprint. The μMAX package provides a compact form factor suitable for dense PCB layouts.

Replacement Considerations

Direct functional substitutes include MAX952EUA, MAX953EUA, and MAX954EUA. Selection depends on required gain stability and reference availability. Verify pin compatibility and electrical parameter alignment before substitution.

FAQ

What is the input common-mode voltage range?

The common-mode input voltage range extends from the negative supply rail (VSS) to within 1.6V of the positive rail (VDD).

Is the operational amplifier unity-gain stable?

Yes, the op amp in the MAX951EUA is internally compensated to be unity-gain stable.

How does the device handle comparator noise immunity?

The comparator includes ±3mV of internal hysteresis to ensure clean output switching even with slow-moving input signals.