MAX9003EUA-T

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 in an 8-pin µMAX package. It operates from +2.5V to +5.5V supplies with typical quiescent current of 410µA. The op-amp offers an 8MHz gain-bandwidth product and is stable for closed-loop gains of +10V/V or greater. The comparator features a fast 185ns propagation delay and internal ±2mV hysteresis. An internal 1.230V reference provides ±1% accuracy.

Feature Summary

• Combines high-speed op amp, fast comparator, and precision reference in space-saving µMAX package
• Unity-gain stable options available alongside decompensated high-speed variants
• Op-amp and comparator outputs swing rail-to-rail for maximum dynamic range
• Internal ±2mV comparator hysteresis ensures noise immunity and prevents oscillations

Applications

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

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging configuration when sourcing. Confirm that the device falls within the -40°C to +85°C operating temperature range specified for the MAX9003 series. Ensure compatibility with single-supply voltages between +2.5V and +5.5V for intended application requirements.

Selection Notes

Select this component when a compact solution integrating amplification, comparison, and reference generation is required. Choose over discrete solutions to save board space and reduce component count. Consider the 8MHz bandwidth and 185ns delay for applications requiring moderate speed with low power consumption constraints.

Part Context

This part belongs to the MAX9000 family of mixed-signal ICs designed for portable and battery-powered applications. The family includes variants with different stability characteristics and shutdown capabilities. The MAX9003 specifically lacks a shutdown pin but includes the internal reference connected to the comparator's inverting input.

Replacement Considerations

Direct replacements include other members of the MAX9000 family such as the MAX9000EUA+T or MAX9001EUA+T, provided their specific stability and shutdown features align with the design requirements. Verify pinout compatibility and electrical parameter overlaps before substitution.

FAQ

Is the MAX9003 unity-gain stable?

No, the MAX9003 is decompensated and is stable only for closed-loop gains of +10V/V or greater.

How is the comparator configured in the MAX9003?

The comparator's inverting input is internally connected to the precision reference output.

What is the typical supply current for the MAX9003?

The typical supply current is 410µA at VDD = 5V and TA = +25°C.