MAX9000EUA

Overview

The MAX9000EUA+ 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 quiescent current of 410µA. The op amp offers 1.25MHz gain-bandwidth product and 0.85V/µs slew rate. The comparator features 185ns propagation delay and ±2mV hysteresis. The internal reference provides 1.230V output with 8ppm/°C drift. Available in an 8-pin µMAX package for space-constrained designs.

Feature Summary

• Integrates a unity-gain stable op amp, fast comparator, and precision reference in a compact µMAX package
• Operates on a single supply ranging from +2.5V to +5.5V with ultra-low power consumption
• Features rail-to-rail outputs for both the amplifier and comparator stages
• Includes built-in comparator hysteresis to ensure noise immunity during signal transitions

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 component authenticity through authorized distribution channels. Confirm that the specific ordering suffix matches the required package type and temperature range specifications. Ensure compliance with relevant environmental standards before integration into final assemblies.

Selection Notes

Select this device when space is limited and multiple analog functions are required on a single chip. Choose this part over discrete solutions to reduce board area and simplify design complexity. Consider the specific gain stability requirements of the application when selecting between family variants.

Part Context

This component belongs to the MAX9000 family of mixed-signal ICs designed for portable electronics. It shares functional similarities with other Maxim Integrated low-power amplifiers but distinguishes itself by integrating three distinct analog blocks. The family targets applications requiring minimal component count and efficient power usage.

Replacement Considerations

Direct replacements within the same series include the MAX9001EUA+, which adds shutdown functionality. Other compatible options depend on specific gain bandwidth and reference requirements. Verify pin compatibility and electrical parameters before substituting any alternative components.

FAQ

How does the MAX9000 handle input signals exceeding the common-mode range?

The device is designed to prevent phase reversal when the common-mode input range is exceeded, ensuring stable operation even with overdriven inputs.

What is the purpose of the internal hysteresis in the comparator section?

The built-in ±2mV hysteresis provides noise immunity and prevents oscillations or unstable outputs when processing slow-moving input signals.