MAX9001ESD+T

Overview

The MAX9001ESD+T 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 device features a unity-gain stable op amp with 1.25MHz gain-bandwidth product and a fast 185ns propagation delay comparator. It includes a 1.230V ±1% internal reference with 8ppm/°C drift. The ESD suffix indicates a 14-pin SOIC package suitable for surface-mount applications.

Feature Summary

• Combines a unity-gain stable op amp, a fast comparator, and a precision 1.230V reference in a single space-saving package
• Features rail-to-rail outputs for both the amplifier and comparator to maximize dynamic range
• Includes built-in ±2mV hysteresis in the comparator to ensure noise immunity and prevent oscillations
• Offers a shutdown mode that reduces supply current to 2µA and places outputs in a high-impedance state

Applications

• Smart card readers requiring low power consumption and compact form factors
• Crossing detectors for signal processing and threshold detection
• Single-supply zero-photodiode preamplifiers for optical sensing
• Infrared receivers and bar-code readers for remote control systems
• Keyless entry sensor signal detection circuits

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm package type and temperature range. Ensure compatibility with existing board layouts by checking pin configurations. Confirm availability status through authorized distribution channels as supply levels may vary.

Selection Notes

Select this component when a combined solution for amplification, comparison, and reference generation is required to save board space. Consider the 14-pin SOIC package for standard surface-mount assembly processes. Evaluate the shutdown feature if battery life extension is a critical design parameter for portable devices.

Part Context

This part belongs to the MAX9000 family of low-power, high-speed single-supply ICs manufactured by Analog Devices Inc./Maxim Integrated. The family integrates multiple analog functions into compact packages to simplify circuit design for portable and battery-powered applications.

Replacement Considerations

Consult official manufacturer documentation for confirmed substitute part numbers within the MAX9000 series or industry second-sources. Verify functional equivalence regarding pinout, electrical characteristics, and package dimensions before implementation.

FAQ

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

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

How does the MAX9001 handle overdriven inputs?

The device features no phase reversal for overdriven inputs for both the op amp and the comparator.

What is the stability characteristic of the internal voltage reference?

The internal 1.230V precision reference is stable for capacitive loads up to 100nF.