MAX9001EUB+T

Overview

The MAX9001EUB+T is a low-power, high-speed single-supply integrated circuit combining a unity-gain stable operational amplifier, a fast comparator, and a precision voltage reference. It operates from +2.5V to +5.5V supplies with typical quiescent current of 410µA. The op amp offers 1.25MHz gain-bandwidth product and rail-to-rail outputs. The comparator features 185ns propagation delay and internal ±2mV hysteresis. An internal 1.230V reference provides ±1% accuracy. A shutdown mode reduces current to 2µA. It is housed in a 10-pin µMAX package.

Feature Summary

• Integrates a unity-gain stable op amp, a fast comparator, and a precision reference in a compact package
• Features a dedicated shutdown pin that significantly reduces supply current for battery-powered applications
• Provides rail-to-rail output swing for both the amplifier and comparator stages
• Includes built-in comparator hysteresis to ensure noise immunity during signal transitions

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 circuits

Procurement Notes

Verify the specific suffix EUB corresponds to the 10-pin µMAX package variant when sourcing. Confirm the presence of the lead-free (+) designation for environmental compliance requirements. Ensure the shutdown logic level compatibility matches the system control voltage before integration.

Selection Notes

Select this component when a combined solution for amplification, comparison, and reference generation is required to save board space. It is suitable for designs needing rail-to-rail performance on a single supply. Consider the shutdown feature if power conservation is critical. Verify that the 1.25MHz bandwidth meets the signal processing speed requirements.

Part Context

This device belongs to the MAX9000 family of mixed-signal ICs designed for portable electronics. It shares architectural similarities with the MAX9000, MAX9003, and MAX9004, which also include internal references. Unlike the MAX9002 or MAX9005, it includes the reference output and shutdown functionality within the same footprint.

Replacement Considerations

Official substitutes within the same family include the MAX9000EUA, MAX9003EUA, and MAX9004EUB. These parts share similar electrical characteristics but may differ in gain stability or package options. Verify pinout compatibility and functional equivalence before substitution.

FAQ

How does the shutdown mode affect the output states?

When the shutdown pin is driven high, the supply current drops to approximately 2µA, and all outputs enter a high-impedance state.

What is the input common-mode voltage range for the comparator?

The comparator input common-mode voltage extends from 150mV below the negative supply to within 1.1V of the positive supply.