MAX40009ANT+

Overview

The MAX40009ANT+T is a single-channel analog comparator from Analog Devices, housed in a 6-bump WLP package. It operates on a supply voltage of 1.7V to 5.5V with a typical quiescent current of 12μA and a propagation delay of 220ns. The device features rail-to-rail inputs, internal hysteresis, and a push-pull output stage capable of sourcing or sinking up to 8mA. It includes a shutdown input that reduces current to 1μA and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Push-pull output stage provides robust drive capability without requiring external pull-up resistors.
• Integrated shutdown control significantly reduces power consumption during inactive periods.
• Rail-to-rail input common-mode range ensures compatibility across the full supply voltage spectrum.
• Internal hysteresis prevents output oscillation caused by noise or slow-moving input signals.

Applications

• Mobile communications systems
• Portable and battery-powered devices
• Window comparator circuits
• Logic level translation between different voltage domains
• Threshold detection and discrimination

Procurement Notes

Verify the specific suffix 'ANT' confirms the 6-bump WLP package and lead-free status. Confirm the '+T' designation indicates tape-and-reel packaging for automated assembly. Ensure the manufacturer is identified as Analog Devices Inc. or Maxim Integrated. Validate RoHS compliance documentation matches the component marking.

Selection Notes

Select this part when board space is constrained due to its ultra-compact WLP footprint. Choose over the MAX40008 if a push-pull output is required instead of open-drain. Consider the low 12μA supply current for battery-operated applications. Verify that the 220ns propagation delay meets system timing requirements.

Part Context

This component belongs to the MAX40008/MAX40009 family of micro-power comparators. It shares identical electrical characteristics with the MAX40008 except for the output stage configuration. The family is designed for low-voltage, high-speed applications where power efficiency and small form factor are critical design parameters.

Replacement Considerations

MAX40008ANT+T serves as a functional substitute with an open-drain output instead of push-pull. MAX40009AUT+T offers the same electrical performance but utilizes a 6-pin SOT23 package rather than the WLP format.

FAQ

Does the MAX40009 require an external pull-up resistor?

No, the MAX40009 features a push-pull output stage that drives both high and low states internally, eliminating the need for external pull-up components.

What is the function of the SHDN pin?

The SHDN pin is an active-low shutdown input. When driven low, it places the device into a low-power state, reducing the supply current to approximately 1μA.

How does the device handle noisy input signals?

The MAX40009 includes integrated internal hysteresis (typically 3mV) to prevent output oscillation and ensure clean switching even when input signals change slowly or contain noise.