MAX40001AUT12+

Overview

The MAX40001AUT12+T is a single-channel analog comparator with an integrated voltage reference, housed in a 6-pin SOT-23 package. It operates on a supply voltage range of 1.7V to 5.5V and consumes a typical supply current of 0.9µA. The device features an open-drain output capable of sinking up to 2mA. Key electrical characteristics include a maximum input offset voltage of 14mV over the extended temperature range, a propagation delay of 14µs at 100mV overdrive, and internal hysteresis of 2.5mV. The built-in reference provides a nominal voltage of 1.252V with ±1% initial accuracy.

Feature Summary

• Integrates a precision voltage reference with ±1% initial accuracy to eliminate external components.
• Features an open-drain output stage that allows connection to pull-up voltages beyond the supply rail.
• Includes internal filtering for high RF immunity and 2.5mV of internal hysteresis to prevent oscillation.
• Operates within an automotive temperature range of -40°C to +125°C.

Applications

• Cell phones
• Portable medical instruments and wearables
• Level detectors

Procurement Notes

Verify the specific ordering suffix to confirm the package type and reference voltage. Confirm RoHS compliance status through official manufacturer documentation. Ensure the selected variant matches the required operating temperature range and output configuration for the target application design.

Selection Notes

Select this component when board space is limited and low power consumption is critical. The open-drain output requires an external pull-up resistor. Verify that the system logic levels are compatible with the chosen pull-up voltage. Consider the input bias current impact on source impedance for high-precision applications.

Part Context

This part belongs to the MAX40000/MAX40001 nanoPower comparator family. The MAX40000 variant offers a push-pull output, while the MAX40001 provides an open-drain output. Both share identical electrical specifications except for the output stage structure and available packages.

Replacement Considerations

The MAX40000AUT12+T serves as a functional substitute if a push-pull output is acceptable instead of open-drain. Other variants within the MAX40000/MAX40001 series may be used if different reference voltages or package types are required.

FAQ

How does the open-drain output affect circuit design?

The open-drain output requires an external pull-up resistor connected to a voltage source up to 5.5V. This allows the output to interface with logic levels higher than the device supply voltage.

What is the purpose of the internal hysteresis?

The 2.5mV internal hysteresis prevents output oscillation caused by noise or slow-moving input signals near the threshold voltage.