MAX9003ESA

Overview

The MAX9003ESA 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 typical quiescent current of 410µA. The op-amp features an 8MHz gain-bandwidth product and is stable for closed-loop gains of +10V/V or greater. The comparator offers 185ns propagation delay with ±2mV built-in hysteresis. An internal 1.230V reference provides ±1% accuracy and 8ppm/°C drift. The device utilizes an 8-pin SOIC package.

Feature Summary

• Combines high-speed op amp, fast comparator, and precision reference in one IC
• Rail-to-rail outputs extend dynamic range on single supply
• Internal comparator hysteresis ensures noise immunity
• Ground-sensing inputs allow operation near negative rail

Applications

• Smart card readers
• Photodiode preamplifiers
• Crossing detectors
• Infrared receivers
• Bar-code readers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct pinout and feature configuration. Confirm that the component meets RoHS3 compliance requirements for the intended application environment. Check for any recent product change notices regarding manufacturing updates.

Selection Notes

Select this part when space-saving integration of three distinct analog functions is required. Choose the MAX9003 over unity-gain stable variants if higher bandwidth at gains of 10V/V or more is necessary. Ensure the design accommodates the decompensated nature of the amplifier for stability.

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 different amplifier stabilities and shutdown capabilities. The MAX9003 specifically targets applications requiring high-speed signal processing without the power overhead of larger discrete solutions.

Replacement Considerations

Consult official manufacturer substitution guides for confirmed compatible replacements. Verify pin compatibility and electrical parameter overlaps before integrating alternative components into existing designs.

FAQ

How does the MAX9003 differ from the MAX9000?

The MAX9003 features a decompensated operational amplifier stable for gains of +10V/V or greater with an 8MHz gain-bandwidth product, whereas the MAX9000 has a unity-gain stable amplifier with a 1.25MHz gain-bandwidth product.

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, allowing it to be used as a threshold detector referenced to the internal 1.230V voltage.