MAX954ESA+

Overview

The MAX954ESA+ is a single-supply analog device integrating a decompensated operational amplifier, a comparator, and high-impedance inputs within an 8-pin SOIC package. It operates from a 2.4V to 7V supply with a typical quiescent current of 5μA. The op amp provides a 125kHz gain-bandwidth product and 66V/ms slew rate, stable for gains of 10V/V or greater. Both the op amp and comparator feature rail-to-rail outputs and input ranges extending to the negative rail. The comparator includes ±3mV internal hysteresis and can source up to 40mA.

Feature Summary

• Integrates a decompensated op amp, comparator, and high-impedance CMOS inputs in a compact 8-pin package
• Features rail-to-rail output stages for both the amplifier and comparator functions
• Includes internal comparator hysteresis to ensure clean switching with slow-moving signals
• Operates on a single low-voltage supply with ultra-low typical supply current

Applications

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

Procurement Notes

Verify the specific suffix 'ESA' corresponds to the 8-pin Small Outline package and the '-E' grade indicating the -40°C to +85°C operating temperature range. Confirm that the component lacks an internal reference voltage, as this distinguishes it from the MAX951/MAX952 variants. Ensure the design accounts for the decompensated nature of the op amp, requiring a minimum closed-loop gain of 10V/V for stability.

Selection Notes

Select the MAX954ESA+ when a decompensated operational amplifier with higher bandwidth is required alongside a comparator in a single package. This part is suitable for applications where unity-gain stability is not needed, allowing for improved speed characteristics compared to the MAX951/MAX953. Choose this variant over the MAX951/MAX952 if an internal reference voltage is unnecessary for the circuit design.

Part Context

The MAX954ESA+ belongs to the MAX951–MAX954 family of micropower, single-supply devices. These components combine an operational amplifier, a comparator, and optionally a precision reference into one integrated circuit. The MAX954 specifically excludes the internal bandgap reference found in the MAX951 and MAX952 models, offering flexibility for designs requiring external reference sources or simplified pin configurations.

Replacement Considerations

The MAX954EUA+ serves as a direct pin-compatible replacement utilizing the μMAX package. Other family members like the MAX951, MAX952, and MAX953 share functional similarities but differ in op amp compensation and the presence of an internal reference.