US1881LUA-AAA-000-BU
Overview
The US1881LUA-AAA-000-BU is a high-sensitivity bipolar Hall-effect latch designed using CMOS technology. It features a chopper-stabilized amplifier stage to minimize offset drift and a wide 3.5V to 24V supply voltage range, making it suitable for both automotive and industrial applications. The open-drain output changes state when exposed to a magnetic south pole and latches until a north pole is detected.
Why Choose This Part
This sensor utilizes dynamic offset cancellation to maintain stability across its wide -40C to 150C operating temperature range. Its high magnetic sensitivity and integrated Schmitt trigger ensure clean, jitter-free switching even in electrically noisy environments.
Applications
Key Specifications
Getting Started
Interface the open-drain output to a microcontroller GPIO using a 10k ohm pull-up resistor to VDD. For stable operation in automotive or industrial circuits, place a 100nF decoupling capacitor close to the supply pins as recommended by Melexis. Testing can be performed using a basic breadboard and a permanent magnet to observe the latching behavior on a multimeter or oscilloscope.
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