MAX9002ESA+

Overview

The MAX9002ESA+ is a low-power, high-speed single-supply integrated circuit combining a unity-gain stable operational amplifier and a fast comparator. It operates from +2.5V to +5.5V with typical supply current of 340µA. The op amp features a 1.25MHz gain-bandwidth product and 0.85V/µs slew rate. The comparator offers 185ns propagation delay with ±2mV hysteresis. Both outputs swing rail-to-rail. It lacks an internal reference but provides accessible comparator inputs in an 8-pin SOIC package.

Feature Summary

• Integrates a unity-gain stable op amp and a fast comparator in a single space-saving package
• Rail-to-rail output capability for both the amplifier and comparator stages
• Built-in comparator hysteresis ensures noise immunity and prevents oscillations
• Low quiescent current consumption suitable for portable and battery-powered applications

Applications

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

Procurement Notes

Verify component authenticity through authorized Analog Devices channels. Confirm datasheet revision and lot traceability upon receipt. Ensure storage conditions comply with moisture sensitivity levels specified in the official documentation to maintain device reliability during soldering processes.

Selection Notes

Select this part when a combined amplification and comparison function is required without an internal voltage reference. The MAX9002 differs from the MAX9000 by lacking the internal 1.230V reference, allowing external reference flexibility. Choose this over the MAX9003 if unity-gain stability is preferred over higher bandwidth decompensated operation.

Part Context

The MAX9002 belongs to the MAX9000 family of mixed-signal ICs designed for low-voltage single-supply operations. It shares the same physical footprint and pinout as other variants in the series, differing primarily in internal functional blocks like the presence or absence of a precision reference and the gain stability characteristics of the operational amplifier stage.

Replacement Considerations

Direct replacements within the same family include the MAX9005, which shares identical electrical characteristics and pinout but may differ in temperature range or packaging suffixes. Verify that any substitute maintains the unity-gain stability requirement and rail-to-rail output specifications.

FAQ

Does the MAX9002ESA+ include an internal voltage reference?

No, the MAX9002 does not contain an internal precision reference. Unlike the MAX9000 or MAX9003, it provides accessible comparator inputs for external reference integration.

What is the gain stability characteristic of the operational amplifier in the MAX9002?

The operational amplifier in the MAX9002 is unity-gain stable with a gain-bandwidth product of 1.25MHz. This contrasts with the MAX9003/MAX9005, which are decompensated and require a minimum closed-loop gain of 10V/V.