MAX9000ESA

Overview

The MAX9000ESA is a low-power, high-speed single-supply integrated circuit combining an operational amplifier, a comparator, and a precision voltage reference. It operates from +2.5V to +5.5V supplies with quiescent current typically at 410µA. The op amp offers unity-gain stability with a 1.25MHz gain-bandwidth product. The comparator features a 185ns propagation delay and internal ±2mV hysteresis. An internal 1.230V reference provides ±1% accuracy. The device is housed in an 8-pin SO package.

Feature Summary

• Combines a high-speed op amp, fast comparator, and precision reference in a compact 8-pin SO package
• Operates on a single supply ranging from +2.5V to +5.5V with ultra-low power consumption
• Features rail-to-rail outputs for both the amplifier and comparator stages
• Includes internal ±2mV comparator hysteresis to ensure noise immunity

Applications

• Single-supply zero-drift photodiode preamplifiers
• Smart card readers and crossing detectors
• Infrared receivers and bar-code readers for remote controls
• Keyless entry systems and sensor signal detection

Procurement Notes

Verify component authenticity through authorized channels as this part may be discontinued or subject to lifecycle changes. Confirm the specific suffix 'ESA' matches the required 8-pin SO package and temperature range. Review the latest manufacturer documentation for any pinout or electrical specification updates before finalizing procurement plans.

Selection Notes

Select the MAX9000ESA when a combined solution of amplification, comparison, and reference is required in a small footprint. Choose this model over decompensated variants if unity-gain stability is necessary for the application. Ensure the design accommodates the specific input common-mode voltage ranges and output drive capabilities defined in the datasheet.

Part Context

This component belongs to the MAX9000 family of mixed-signal ICs designed for portable and battery-powered applications. The family includes variants with shutdown modes and different amplifier bandwidths. The MAX9000 specifically integrates a unity-gain stable amplifier with a built-in precision reference, distinguishing it from non-reference versions like the MAX9002.

Replacement Considerations

Direct replacements within the same family include the MAX9000EUA, which shares identical electrical characteristics but utilizes an 8-pin µMAX package instead of the SO format. Designers must account for the physical dimension differences between the SO and µMAX packages during board layout modifications.

FAQ

How does the MAX9000ESA handle phase reversal?

The device is designed to prevent phase reversal for overdriven inputs on both the operational amplifier and the comparator stages.

What is the function of the comparator's inverting input in this specific part?

In the MAX9000, the comparator's inverting input is internally connected to the precision reference output.

Is the amplifier in the MAX9000ESA stable at unity gain?

Yes, the amplifier in the MAX9000 is unity-gain stable with a gain-bandwidth product of 1.25MHz.