MAX9003EUA+

Overview

The MAX9003EUA+ 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. The op-amp offers an 8MHz gain-bandwidth product and is stable for closed-loop gains of +10V/V or greater. The device features rail-to-rail outputs, ground-sensing inputs, and an internal ±2mV comparator hysteresis. It includes a 1.230V reference with 8ppm/°C drift and is housed in an 8-pin µMAX package.

Feature Summary

• Combines high-speed op amp, fast comparator, and precision reference in a compact µMAX package
• Features internal ±2mV comparator hysteresis for noise immunity and glitch-free output transitions
• Provides rail-to-rail input and output capabilities with ground-sensing inputs
• Includes a 1.230V precision reference with low temperature drift and capacitive load stability

Applications

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

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to ensure correct package type and temperature range. Confirm availability status directly with authorized distributors as supply conditions may vary. Ensure compatibility with existing board layouts regarding the 8-pin µMAX footprint and pin configuration.

Selection Notes

Select this component when a combined solution for amplification, comparison, and reference generation is required in space-constrained designs. Choose this model over unity-gain stable variants if higher bandwidth at gains of +10V/V or greater is necessary. Consider the internal reference connection to the comparator inverting input for simplified circuit topology.

Part Context

This device belongs to the MAX9000 family of mixed-signal ICs designed for portable and battery-powered applications. It shares architectural similarities with the MAX9000, MAX9001, and MAX9002 but differs in amplifier stability characteristics. The family emphasizes low power consumption while maintaining high-speed performance in a small form factor.

Replacement Considerations

Official substitutes within the same family include the MAX9000EUA+, MAX9001EUA+, and MAX9002EUA+. Verify functional equivalence regarding amplifier gain stability requirements and reference availability before substitution.

FAQ

Is the MAX9003 op-amp unity-gain stable?

No, the MAX9003 op-amp 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 maximum capacitive load the op-amp can drive stably?

The op-amp is stable with capacitive loads up to 250pF.