MAX9003EUA

Overview

The MAX9003EUA+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 +2.5V to +5.5V supplies with quiescent current of 410µA typical. The op-amp offers an 8MHz gain-bandwidth product and 6.0V/µs slew rate for closed-loop gains ≥10V/V. The comparator features 185ns propagation delay and ±2mV internal hysteresis. An internal 1.230V reference provides ±1% accuracy and 8ppm/°C drift. Outputs swing rail-to-rail in an 8-pin µMAX package.

Feature Summary

• Combines high-speed op amp, fast comparator, and precision reference in space-saving µMAX package
• Rail-to-rail outputs for both amplifier and comparator extending dynamic range
• Internal ±2mV comparator hysteresis prevents oscillations with slow-moving signals
• Ground-sensing inputs allow operation near the negative supply rail

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 the specific suffix 'EUA+' against the manufacturer's official documentation to confirm the exact temperature range, lead-free status, and tape-and-reel packaging configuration. Ensure compatibility with the target PCB footprint for the 8-pin µMAX package before finalizing procurement orders.

Selection Notes

Select this component when a single-supply design requires simultaneous amplification, comparison, and voltage referencing. The decompensated op-amp architecture suits applications needing higher bandwidth at gains of 10V/V or greater. Verify that the load capacitance remains within the stability limits specified for the amplifier output stage.

Part Context

This device belongs to the MAX9000 family of mixed-signal ICs designed for portable electronics. It integrates three distinct analog functions into one compact footprint, reducing board space compared to discrete solutions. The family includes variants with unity-gain stable amplifiers and shutdown modes, offering flexibility for various power and performance requirements.

Replacement Considerations

Official substitutes within the same family include the MAX9000EUA+, MAX9001EUA+, and MAX9002EUA+. These parts share the same 8-pin µMAX package but differ in op-amp stability (unity-gain vs. decompensated) and the presence of a shutdown pin or internal reference.

FAQ

How does the MAX9003 handle input overdrive without phase reversal?

The unique MOS differential input design ensures no phase reversal occurs for either the op-amp or comparator when the common-mode input voltage exceeds the supply rails.

What is the function of the comparator's inverting input in the MAX9003?

In the MAX9003, the comparator's inverting input is internally connected to the precision reference output, simplifying circuit design by eliminating the need for external biasing components.