MAX951ESA-T

Overview

The MAX951ESA-T is an ultra-low-power, single-supply integrated circuit combining a micro-power operational amplifier, comparator, and precision reference within an 8-pin SO 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 systems, it offers unity-gain stability or decompensated options depending on the specific variant.

Feature Summary

• Combines op amp, comparator, and reference in one 8-pin package
• Ultra-low power consumption with 7μA typical supply current
• Rail-to-rail output swing capability for both op amp and comparator
• Internal ±3mV comparator hysteresis ensures noise immunity

Applications

• Battery-powered portable instruments and terminals
• Low-frequency local-area alarms and detectors
• Photodiode preamplifiers for sensor interfaces
• Infrared receivers for remote control applications
• Smoke detectors and safety sensors

Procurement Notes

Verify the exact suffix against official manufacturer documentation to confirm package type and temperature range specifications. Ensure compatibility with single-supply designs operating between 2.7V and 7V. Confirm RoHS compliance status through the latest datasheet revision before finalizing procurement plans.

Selection Notes

Select this component when space constraints require multiple analog functions in a single package. Choose variants based on required gain stability; MAX951/953 are unity-gain stable while MAX952/954 offer higher bandwidth for gains of 10V/V or greater. Consider the internal reference availability if a precise voltage threshold is needed for the comparator stage.

Part Context

This part belongs to the MAX951–MAX954 family of ultra-low-power mixed-signal ICs manufactured by Analog Devices Inc./Maxim Integrated. The family provides flexible configurations of amplifiers, comparators, and references tailored for low-voltage, battery-operated applications requiring minimal quiescent current and high input impedance.

Replacement Considerations

Consult official manufacturer substitution guides for verified alternatives. Cross-reference pinouts and electrical characteristics carefully to ensure functional equivalence in existing designs without modifying board layout.

FAQ

Does the MAX951 include an internal reference?

Yes, the MAX951 includes an internal 1.2V ±2% bandgap reference connected to the comparator's inverting input.

What is the common-mode input voltage range?

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

Can the op amp drive capacitive loads?

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