MAX9005EUA+

Overview

The MAX9005EUA+ is a low-power, high-speed single-supply integrated circuit combining an operational amplifier, a comparator, and precision voltage reference components within an 8-pin µMAX package. It operates from a +2.5V to +5.5V supply with typical quiescent current of 340µA. The op-amp offers an 8MHz gain-bandwidth product and rail-to-rail output swing. The comparator features a 185ns propagation delay and ±2mV internal hysteresis. Unlike other family members, it lacks an internal reference but provides accessible comparator inputs.

Feature Summary

• Combines high-speed op-amp, fast comparator, and precision reference in space-saving µMAX package
• Unity-gain stable and decompensated options available for various gain requirements
• Op-amp and comparator outputs swing rail-to-rail for maximum dynamic range
• Ground-sensing inputs allow operation near the negative supply rail

Applications

• Single-supply zero-drift photodiode preamplifiers
• Crossing detectors and smart card readers
• Infrared receivers and bar-code readers for remote controls
• Keyless entry sensor signal detection systems

Procurement Notes

Verify component authenticity through authorized Analog Devices channels. Confirm package integrity and pin alignment upon receipt. Ensure storage conditions match manufacturer specifications to maintain device reliability. Check for RoHS compliance documentation if required by local regulations.

Selection Notes

Select this part when high speed and low power are critical in a small footprint. Choose over MAX9000/03 variants if an internal reference is not needed. Verify that the 8MHz bandwidth meets system requirements. Ensure the single-supply voltage range aligns with the application's power constraints.

Part Context

This device belongs to the MAX9000 family of mixed-signal ICs designed for portable applications. It shares the same package and basic architecture as the MAX9000 series but omits the internal reference block. This configuration allows designers to use external references or simplify circuits where internal biasing is unnecessary.

Replacement Considerations

Direct replacements include other MAX9005 variants with different temperature ranges or packaging suffixes. Cross-reference with MAX9002 if lower bandwidth is acceptable. Ensure functional compatibility regarding input/output characteristics before substitution.

FAQ

Does the MAX9005 include an internal voltage reference?

No, the MAX9005 does not contain an internal reference. The inverting input of the comparator is available externally for connection to an external reference source.

What is the gain stability requirement for the op-amp in the MAX9005?

The op-amp in the MAX9005 is decompensated and is stable only for closed-loop gains of +10V/V or greater.

How much hysteresis does the comparator provide?

The comparator includes built-in ±2mV of input-referred hysteresis to provide noise immunity and prevent oscillations.