MAX9005ESA+

Overview

The MAX9005ESA+ is a low-power, high-speed single-supply integrated circuit combining an operational amplifier, a comparator, and precision voltage reference components. It operates from a +2.5V to +5.5V supply with typical quiescent current of 340µA. The op-amp features an 8MHz gain-bandwidth product and 6.0V/µs slew rate, stable for gains ≥10V/V. The comparator offers 185ns propagation delay with ±2mV hysteresis. Outputs swing rail-to-rail, delivering up to ±2.5mA (op-amp) and ±4.0mA (comparator). It functions within -40°C to +85°C in an 8-pin SO package.

Feature Summary

• Combines high-speed op-amp, fast comparator, and precision reference in a compact 8-pin SO package
• Rail-to-rail output capability for both the operational amplifier and comparator stages
• Built-in ±2mV comparator hysteresis ensures noise immunity and prevents oscillations
• No phase reversal occurs when inputs exceed the common-mode voltage range

Applications

• Single-supply zero-drift photodiode preamplifiers
• Infrared receiver signal detection circuits
• Smart card readers and remote control bar-code readers
• Crossing detectors and keyless entry sensors
• Instruments and terminals requiring precise signal conditioning

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm package type and temperature range. Confirm availability status directly with authorized distributors as supply conditions may vary. Ensure compatibility with existing board layouts by checking pin configurations and electrical specifications prior to integration.

Selection Notes

Select this component when a combined op-amp and comparator solution is required without an internal reference. Choose the decompensated op-amp variant for applications demanding higher bandwidth at closed-loop gains of 10V/V or greater. Verify that the external comparator input configuration aligns with system requirements since the inverting input is not internally tied to a reference source.

Part Context

This device belongs to the MAX9000 family of mixed-signal ICs designed for portable and battery-powered systems. While similar parts in the series include internal references or shutdown modes, the MAX9005 specifically omits the internal reference and shutdown functionality to provide accessible comparator inputs. This makes it distinct from unity-gain stable counterparts like the MAX9002.

Replacement Considerations

Direct replacements must match the 8-pin SO package and electrical characteristics. Consider the MAX9002ESA+ if unity-gain stability is required instead of decompensated operation. Evaluate other family members like the MAX9000ESA+ only if an internal reference is needed, noting differences in op-amp bandwidth and stability requirements.

FAQ

["What is the gain-bandwidth product of the operational amplifier?","The operational amplifier has a gain-bandwidth product of 8MHz and is stable for closed-loop gains of +10V/V or greater."]

["How does the comparator handle noise during transitions?","The comparator includes built-in ±2mV of hysteresis, which provides noise immunity and prevents output oscillations even with slow-moving input signals."]

["What is the maximum output current capability of the op-amp?","The operational amplifier output can deliver up to ±2.5mA to an external load while maintaining excellent DC accuracy and rail-to-rail swing."]