MAX953EUA-T

Overview

The MAX953EUA-T is a single-supply, ultra-low-power special-purpose amplifier integrating an operational amplifier and a comparator within an 8-pin μMAX package. It operates from a 2.4V to 7V supply with a typical quiescent current of 5μA. The op amp is unity-gain stable with a 20kHz gain-bandwidth product and 12.5V/ms slew rate. The comparator features rail-to-rail outputs capable of sourcing up to 40mA and includes ±3mV internal hysteresis for noise immunity. Input common-mode voltage ranges extend from the negative rail to within 1.6V of the positive rail.

Feature Summary

• Integrates a unity-gain stable operational amplifier and a high-current comparator in a compact 8-pin μMAX package
• Ultra-low power consumption with a typical supply current of 5μA across the operating temperature range
• Rail-to-rail input and output stages allow operation close to supply rails without signal clipping
• Comparator includes built-in hysteresis to ensure clean switching and minimize parasitic feedback

Applications

• Battery-powered portable instruments and terminals
• Low-frequency local-area alarms and detectors
• Photodiode preamplifiers
• Smart card interfaces
• Infrared receivers for remote controls

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when ordering. Confirm the 'E' designation corresponds to the -40°C to +85°C industrial temperature range. Ensure the component matches the 8-pin μMAX footprint requirements for your PCB layout. Check for RoHS compliance status if required by your manufacturing standards.

Selection Notes

Select this device when space is constrained and both amplification and threshold detection are needed. Choose the MAX953 over the MAX951 or MAX952 because it lacks an internal reference, allowing flexible external biasing. Consider the MAX954 only if higher bandwidth (125kHz) and stability at gains of 10V/V or greater are required instead of unity-gain stability.

Part Context

This component belongs to the MAX951–MAX954 family of micropower single-supply amplifiers. While the MAX951 and MAX952 include an internal 1.2V bandgap reference, the MAX953 and MAX954 omit this feature to reduce complexity and cost. The MAX953 specifically targets applications requiring unity-gain stability with minimal power draw.

Replacement Considerations

Public confirmed substitute part numbers: MAX953ESA, MAX953EPA.