MAX9000ESA+

Overview

The MAX9000ESA+ 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 quiescent current typically at 410µA. The op amp offers unity-gain stability with a 1.25MHz gain-bandwidth product. The comparator features a 185ns propagation delay and internal ±2mV hysteresis. An internal 1.230V reference provides ±1% accuracy. The device utilizes an 8-pin SOIC package.

Feature Summary

• Combines a high-speed op amp, fast comparator, and precision reference in a compact package
• Rail-to-rail outputs for both the amplifier and comparator stages
• Internal built-in hysteresis prevents oscillations during slow input transitions
• Low power 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 the specific suffix against official manufacturer documentation to confirm exact pinout and electrical characteristics. Confirm availability status as distribution channels may vary. Ensure environmental compliance requirements match project specifications before finalizing procurement decisions.

Selection Notes

Select this component when space-constrained designs require simultaneous amplification, comparison, and reference generation. Choose based on required gain bandwidth and whether shutdown functionality is needed. Evaluate load capacitance requirements to ensure stability without external compensation components.

Part Context

This part belongs to the MAX9000 family of mixed-signal ICs designed for efficient signal processing in constrained environments. The family includes variants with different gain stabilities and shutdown capabilities. The ESA+ designation indicates surface-mount packaging with lead-free compliant manufacturing processes.

Replacement Considerations

Direct replacements within the same family include the MAX9000EUA+ for µMAX packaging or the MAX9001/003/004 variants if shutdown control is required. Verify pin compatibility and electrical parameter overlaps before substitution.

FAQ

How does the MAX9000ESA+ handle overdriven inputs?

The device is designed with no phase reversal for overdriven inputs for both the operational amplifier and the comparator, ensuring stable operation even when input signals exceed the common-mode range.

What is the function of the internal hysteresis in the comparator?

The internal ±2mV hysteresis provides noise immunity and prevents output oscillations that can occur when processing slow-moving input signals near the threshold voltage.