MAX9001EUB+

Overview

The MAX9001EUB+ 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 typical quiescent current of 410µA. The unity-gain stable op amp offers a 1.25MHz gain-bandwidth product and 0.85V/µs slew rate. The device includes a shutdown mode reducing current to 2µA and features a 1.230V ±1% internal reference. It is housed in a 10-pin µMAX package.

Feature Summary

• Integrates a unity-gain stable op amp, fast comparator, and precision reference in a compact package
• Features a dedicated shutdown mode for ultra-low power consumption in portable applications
• Provides rail-to-rail output swing for both the amplifier and comparator stages
• Includes built-in hysteresis on the comparator to ensure noise immunity

Applications

• Single-supply zero-drift 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 ordering suffix against official manufacturer documentation to confirm package type and temperature range. Ensure compatibility with single-supply voltage requirements between 2.5V and 5.5V. Confirm that the shutdown pin logic levels align with the system control interface before finalizing procurement.

Selection Notes

Select this component when space-constrained designs require combined amplification, comparison, and reference functions. It is suitable for battery-powered devices due to the low shutdown current. Choose this part over discrete solutions when unity-gain stability and rail-to-rail outputs are required within a small footprint.

Part Context

This device belongs to the MAX9000 family of mixed-signal ICs designed for low-power analog applications. The family differentiates models based on op amp bandwidth, reference inclusion, and shutdown capabilities. The MAX9001 variant specifically combines the 1.25MHz amplifier with the internal reference and shutdown feature.

Replacement Considerations

Official substitutes within the same family include the MAX9000EUA+, MAX9002EUB+, and MAX9004EUB+. Verify functional equivalence regarding the presence of the internal reference and shutdown capability. Ensure the replacement package matches the 10-pin µMAX form factor for board compatibility.

FAQ

How does the shutdown mode affect the output states?

When the shutdown pin is driven low, the supply current reduces to approximately 2µA and all outputs enter a high-impedance state.

What is the input common-mode voltage range for the op amp?

The input common-mode voltage extends from 150mV below the negative supply to within 1.2V of the positive supply.