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 at gains ≥10V/V, while the comparator provides 185ns propagation delay. An internal 1.230V ±1% reference with 8ppm/°C drift is included. The device features rail-to-rail outputs, shutdown mode reducing current to 2µA, and ground-sensing inputs in a 14-pin SO package.

Feature Summary

• Integrates high-speed op amp, fast comparator, and precision reference in compact packaging
• Features built-in hysteresis for noise immunity and glitch-free output transitions
• Supports portable applications via ultra-low power shutdown mode
• Provides rail-to-rail input and output capability for maximum dynamic range

Applications

• Single-supply zero-photodiode preamplifiers
• Crossing detectors and sensor signal detection circuits
• Smart card readers and infrared receivers
• Bar-code readers for remote controls
• Keyless entry systems

Procurement Notes

Verify the specific suffix ESD indicates the 14-pin SO package variant when sourcing. Confirm the manufacturer documentation matches the requested pinout and electrical characteristics. Ensure compatibility with single-supply voltage ranges required by the design. Check for availability of the specific temperature grade indicated in the ordering information.

Selection Notes

Select this component when space-constrained designs require combined amplification, comparison, and reference functions. Choose the MAX9004 over unity-gain stable variants if higher bandwidth at gains of 10V/V or greater is necessary. Consider the shutdown feature for battery-powered systems requiring minimal standby current. Verify that the 1.230V reference meets the system accuracy requirements.

Part Context

This part belongs to the MAX9000 family of mixed-signal ICs designed for low-power, single-supply applications. The family integrates analog signal processing blocks into small packages to reduce board space. The MAX9004 specifically targets applications needing decompensated amplifier performance alongside a fast comparator and precise reference. It serves as a complete solution for signal conditioning and threshold detection in compact electronic devices.

Replacement Considerations

Consult official manufacturer documentation for confirmed substitute part numbers. Ensure any replacement maintains the 14-pin SO package footprint and pin configuration. Verify that the alternative device supports the same +2.5V to +5.5V supply range and shutdown functionality. Confirm electrical parameters such as gain-bandwidth and propagation delay meet the original design specifications.

FAQ

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

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

How does the shutdown mode affect the MAX9004 outputs?

In shutdown mode, the supply current reduces to 2µA and all outputs enter a high-impedance state.

What is the purpose of the internal comparator hysteresis?

The ±2mV built-in hysteresis provides noise immunity and prevents oscillations even with slow-moving input signals.