MAX9000EUA+

Overview

The MAX9000EUA+ 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 µMAX package.

Feature Summary

• Combines a high-speed op amp, fast comparator, and precision reference in a compact µMAX package
• Rail-to-rail outputs for both the amplifier and comparator stages
• Internal built-in hysteresis prevents oscillations during slow input transitions
• Shutdown mode available on compatible variants reduces supply current significantly

Applications

• Single-supply zero-photodiode preamplifiers
• Crossing detectors and smart card readers
• 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 pinout and feature availability. Ensure the component meets the required temperature range specifications for the intended environment. Cross-reference the ordering information table to validate the exact part number configuration before finalizing procurement decisions.

Selection Notes

Select this component when space is constrained due to its integrated three-function design within a small footprint. Consider the MAX9000EUA+ for applications requiring rail-to-rail output swing and ground-sensing inputs. Evaluate the trade-off between the 1.25MHz bandwidth and power consumption compared to higher-speed decompensated options.

Part Context

This device belongs to the MAX9000 family of mixed-signal ICs designed for portable and battery-powered applications. The family includes variants with different gain stabilities and shutdown capabilities. The MAX9000 specifically integrates all three functions without a shutdown pin, distinguishing it from the MAX9001 variant which includes shutdown control.

Replacement Considerations

Consult official manufacturer substitution guides for verified alternatives. Ensure any replacement maintains the same 8-pin µMAX package dimensions and electrical characteristics. Verify that the substitute supports the required single-supply voltage range and operating temperature specifications.

FAQ

How does the MAX9000 handle overdriven inputs?

The device is designed with no phase reversal for overdriven inputs for both the operational amplifier and the comparator.

What is the function of the comparator's inverting input in the MAX9000?

In the MAX9000, the comparator's inverting input is internally connected to the precision reference output.

What is the typical supply current for the MAX9000EUA+?

The typical supply current is 410µA at VDD = 5V and TA = +25°C.