MAX9004ESD+

Overview

The MAX9004ESD+ 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 offers 8MHz gain-bandwidth product and rail-to-rail outputs. The comparator features 185ns propagation delay and ±2mV hysteresis. An internal 1.230V reference provides ±1% accuracy. The device includes shutdown mode reducing current to 2µA and is housed in a 14-pin SO package.

Feature Summary

• Combines high-speed op amp, fast comparator, and precision reference in one space-saving package
• Features shutdown mode for ultra-low power consumption in portable applications
• Provides rail-to-rail output swing for both amplifier and comparator stages
• Includes internal built-in hysteresis for noise immunity and stable switching

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

Procurement Notes

Verify the specific suffix ESD against official manufacturer documentation to confirm pinout and package dimensions. Confirm availability status through authorized distributors as supply conditions may vary. Ensure the operating temperature range meets system requirements before integration.

Selection Notes

Select this component when a combined solution for amplification, comparison, and reference is required in a compact form factor. Choose the MAX9004 over unity-gain stable variants if higher bandwidth at gains of 10V/V or greater is needed. Consider the shutdown feature for battery-powered designs requiring extended standby life.

Part Context

This part belongs to the MAX9000 family of mixed-signal ICs designed for low-voltage, single-supply applications. The family integrates analog functions typically requiring multiple discrete components. The MAX9004 specifically targets applications needing decompensated amplifier performance alongside precise voltage referencing and fast comparison capabilities.

Replacement Considerations

Direct replacements within the same family include the MAX9000, MAX9001, and MAX9003, which share similar functional blocks but differ in gain stability and reference availability. Verify pin compatibility and electrical characteristics before substitution.

FAQ

What is the gain stability requirement for the op-amp in the MAX9004?

The op-amp in the MAX9004 is decompensated and is stable only for closed-loop gains of +10V/V or greater.

How does the shutdown mode affect the supply current?

When the shutdown pin is driven high, the supply current reduces to a typical value of 2µA, and the outputs enter a high-impedance state.

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

The internal ±2mV hysteresis provides noise immunity and prevents oscillations when processing slow-moving input signals.