MAX9005EUA+T

Overview

The MAX9005EUA+T is a low-power, high-speed single-supply operational amplifier integrated with a comparator. It operates from a +2.5V to +5.5V supply and draws 340µA of quiescent current. The op amp features an 8MHz gain-bandwidth product and is stable for closed-loop gains of +10V/V or greater. Both the amplifier and comparator outputs swing rail-to-rail. The device includes ground-sensing inputs and eliminates phase reversal for overdriven inputs.

Feature Summary

• Combines high-speed op amp and fast comparator in space-saving µMAX package
• Rail-to-rail output capability for both amplifier and comparator stages
• Ground-sensing inputs allow operation near the negative supply rail
• No phase reversal occurs even when inputs are overdriven beyond common-mode range

Applications

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

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 stock levels fluctuate.

Selection Notes

Select this component when a combined amplification and comparison function is required in a compact footprint. It is suitable for applications needing rail-to-rail output swing on a single supply. Consider the decompensated nature (stable at gains >= 10V/V) for higher bandwidth requirements compared to unity-gain stable variants.

Part Context

This part belongs to the MAX9000 family of mixed-signal ICs designed for portable and battery-powered applications. The family integrates precision references, comparators, and operational amplifiers to reduce system component count. The MAX9005 specifically omits the internal reference found in other family members to save power and cost.

Replacement Considerations

Consult official manufacturer substitution guides for confirmed equivalent parts. Verify that any replacement maintains the same 8-pin µMAX package dimensions and electrical characteristics. Ensure functional compatibility regarding gain stability and output drive capabilities before implementation.

FAQ

Is the MAX9005EUA+T unity-gain stable?

No, the MAX9005 op amp is decompensated and is stable only for closed-loop gains of +10V/V or greater.

Does the MAX9005 include an internal voltage reference?

No, the MAX9005 does not contain an internal precision reference; this feature is available in the MAX9000, MAX9001, MAX9003, and MAX9004 variants.

What is the propagation delay of the integrated comparator?

The comparator has a typical propagation delay of 185ns.