MAX954EUA+

Overview

The MAX954EUA+ is a single-supply, ultra-low-power analog device integrating a decompensated operational amplifier, a comparator, and an external reference output within an 8-pin μMAX package. It operates from a supply voltage range of 2.4V to 7V with a typical quiescent current of 5μA. The op amp provides a typical gain-bandwidth product of 125kHz and a slew rate of 66V/ms, maintaining stability for closed-loop gains of 10V/V or greater. Both the op amp and comparator feature rail-to-rail outputs and input common-mode ranges extending from the negative supply rail to within 1.6V of the positive rail.

Feature Summary

• Integrates a decompensated operational amplifier, a high-drive comparator, and a precision bandgap reference in a compact 8-pin μMAX package
• Features rail-to-rail inputs and outputs for both the amplifier and comparator stages, maximizing dynamic range on single supplies
• Includes internal ±3mV hysteresis in the comparator to ensure clean switching and eliminate power-supply glitches during logic state transitions
• Operates with ultra-low supply current while maintaining linearity under loaded conditions through a proprietary high-gain output stage

Applications

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

Procurement Notes

Verify the specific suffix 'EUA+' corresponds to the required -40°C to +85°C temperature range and 8-pin μMAX package configuration. Confirm that the absence of an internal reference matches the design requirements, as this variant relies on external thresholding rather than the internal bandgap found in other family members. Ensure compatibility with single-supply architectures operating between 2.4V and 7V.

Selection Notes

Select the MAX954EUA+ when a higher bandwidth and slew rate are required compared to unity-gain stable variants. This model is optimized for applications demanding stability at gains of 10V/V or greater. It is suitable for designs where an internal reference is unnecessary, allowing the comparator inputs to be utilized freely without connection to a fixed voltage source.

Part Context

This component belongs to the MAX951–MAX954 family of ultra-low-power, single-supply mixed-signal devices. While sharing the same physical footprint and core architecture, the MAX954 differs from the MAX951 by offering decompensated op amp performance (125kHz GBW) instead of unity-gain stability, and it omits the internal 1.2V bandgap reference present in the MAX951/MAX952 models.

Replacement Considerations

Direct substitutes include the MAX954ESA+ (SO package) and MAX954EPA+ (Plastic DIP package). For pin-compatible alternatives with different electrical characteristics, consider the MAX951 series if unity-gain stability and an internal reference are acceptable.