MAX951EUA+T

Overview

The MAX951EUA+T is an ultra-low-power, single-supply integrated circuit combining a micro-power operational amplifier, a comparator, and a 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 op amp is unity-gain stable, while the comparator features internal hysteresis for clean switching. Both output stages are rail-to-rail capable, and the device includes an internal 1.2V ±2% bandgap reference connected to the comparator's inverting input.

Feature Summary

• Combines op amp, comparator, and reference in an 8-pin μMAX package
• Ultra-low power consumption with 7μA typical supply current
• Rail-to-rail inputs and outputs for maximum dynamic range
• Internal 1.2V ±2% bandgap reference for comparator thresholding

Applications

• Battery-powered portable instruments and terminals
• Low-frequency local-area alarms and detectors
• Photodiode preamplifiers for sensor interfaces
• Smart card applications requiring low power
• Infrared receivers for remote control systems

Procurement Notes

Verify the specific suffix 'EUA' confirms the -40°C to +85°C temperature range and μMAX-8 package type. Ensure the '+T' designation matches the required reel packaging format for surface-mount assembly. Cross-reference the manufacturer part number with official Analog Devices documentation to confirm current production status and availability constraints.

Selection Notes

Select this component when system design requires both amplification and threshold detection in a minimal footprint. The unity-gain stability makes it suitable for buffer applications, while the integrated reference simplifies comparator circuits. Consider the 7μA quiescent current for strict battery life requirements and verify that the 1.6V headroom from the positive rail meets signal swing needs.

Part Context

This device belongs to the MAX951–MAX954 family of mixed-signal ICs designed for single-supply operation. The MAX951 variant specifically integrates the precision reference, distinguishing it from the MAX953 which lacks this feature. The family targets applications where space and power are critical constraints, offering a complete signal conditioning solution in a compact form factor.

Replacement Considerations

No official substitute part numbers are confirmed in the provided datasheet.

FAQ

What is the common-mode input voltage range for the op amp and comparator?

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

How does the internal hysteresis affect comparator performance?

The comparator contains ±3mV of internal hysteresis to ensure clean output switching, even when processing slow-moving input signals.

Can the op amp drive capacitive loads?

Yes, the op amp is capable of driving up to 1000pF of capacitive load while maintaining stability.