MAX953EPA+

Overview

The MAX953EPA+ is an ultra-low-power, single-supply analog device integrating a unity-gain stable operational amplifier and a comparator within an 8-pin plastic DIP package. It operates from a supply voltage range of 2.4V to 7V with a typical quiescent current of 5μA. Unlike the MAX951/952, this variant lacks an internal reference, allowing flexible input configurations. Both the op amp and comparator feature rail-to-rail outputs and common-mode input ranges extending to the negative supply rail.

Feature Summary

• Integrates a unity-gain stable op amp and a comparator in a compact 8-pin package
• Ultra-low power consumption with 5μA typical supply current
• Rail-to-rail output stages for maximum dynamic range
• Comparator includes internal hysteresis for noise immunity

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 component authenticity through authorized Analog Devices channels. Confirm that the ordering suffix corresponds to the specified lead-free and RoHS-compliant status. Ensure the procurement source provides valid traceability documentation for quality assurance purposes.

Selection Notes

Select the MAX953EPA+ when an internal reference is not required, as it offers lower power consumption compared to the MAX951/952 variants. Choose this part for applications requiring unity-gain stability and rail-to-rail operation within a tight 2.4V to 7V supply window. Consider the PDIP-8 package for through-hole mounting requirements.

Part Context

This component belongs to the MAX951–MAX954 family of mixed-signal ICs designed for extreme power efficiency. The MAX953 specifically differentiates itself by omitting the internal bandgap reference found in the MAX951 and MAX952 models. This design choice reduces quiescent current while providing designers with freedom to implement external reference circuits if needed.

Replacement Considerations

The MAX953ESA+ serves as a surface-mount equivalent offering identical electrical characteristics in an SO package. Designers transitioning from other Maxim Integrated comparators should verify pin compatibility and ensure the replacement supports the required single-supply voltage range and low-current operation.

FAQ

Does the MAX953 include an internal voltage reference?

No, the MAX953 does not contain an internal reference. The inverting comparator input is available as an open pin, unlike the MAX951 and MAX952 which feature an internal 1.2V reference.

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 supply rail (VDD).