MAX9000ESA-T

Overview

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

Feature Summary

• Combines a high-speed op amp, comparator, and precision reference in a compact package
• Rail-to-rail outputs for both the amplifier and comparator stages
• Built-in ±2mV comparator hysteresis for noise immunity
• Internal 1.230V precision reference with low temperature drift

Applications

• Single-supply zero-photodiode preamps
• Smart card readers
• Crossing detectors
• Infrared receivers and bar-code readers
• Keyless entry sensor signal detection

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing. Confirm the manufacturer designation as Analog Devices Inc./Maxim Integrated. Check for RoHS compliance status and ensure the component matches the exact pinout and electrical specifications required for the design.

Selection Notes

Select this part for applications requiring a combined amplification, comparison, and reference solution in a small footprint. Choose the MAX9000 variant specifically for its unity-gain stable op amp and internal reference. Ensure the single-supply voltage range of 2.5V to 5.5V aligns with the system power constraints.

Part Context

This component belongs to the MAX9000 family of low-power, high-speed single-supply ICs. The family includes variants like the MAX9001 through MAX9005, which differ in op amp stability, shutdown modes, and reference availability. The MAX9000 specifically integrates all three functions without a shutdown pin.

Replacement Considerations

Official substitutes within the same family include the MAX9000EUA+ for the µMAX package version. Other family members like the MAX9001 or MAX9003 offer similar functionality but may include additional features such as shutdown control or different op amp bandwidth characteristics.

FAQ

How does the MAX9000 handle overdriven inputs?

The device is designed with no phase reversal for overdriven inputs on both the op amp and the comparator.

What is the input common-mode voltage range for the op amp?

The input common-mode voltage extends from 150mV below the negative supply to within 1.2V of the positive supply.

Is the MAX9000 stable with capacitive loads?

Yes, the op amp is stable with capacitive loads up to 250pF, and the internal reference is stable with capacitive loads up to 100nF.