Allegro Microsystems 1 Axis Surface Hall Effect Sensor 3.8 V to 24 V, SOT-23 Package, 3-Pin A1102ELHLT-T

Allegro Microsystems A1102ELHLT-T is a high-precision 1 Axis Surface Hall Effect Sensor designed for electronic applications requiring accurate magnetic field detection over a wide voltage range from 3.8 V to 24 V. Packaged in a compact SOT-23 3-pin format, this sensor is developed using BiCMOS technology which enhances reliability with fast power-on time and low noise operation.

The sensor incorporates an integrated voltage regulator and on-board protection circuitry, making it robust against voltage spikes with a ±30 V absolute maximum rating. The unipolar magnetic sensing allows it to detect magnetic fields in a single polarity, suitable for many automotive and industrial uses. With dimensions of 2.98mm length, 1.91mm width, and 950μm height, it fits compactly on printed circuit boards.

This Hall Effect Sensor meets the stringent automotive-grade AEC-Q100 standard, assuring stable performance under challenging temperature ranges from -40°C up to 85°C. Its low 4.1mA supply current helps reduce power consumption while providing a quick response time of just 4 microseconds, making it ideal for applications such as motor control, position sensing, and contactless switches.

Additional features include factory programming, reverse battery protection, and robust electromagnetic compatibility (EMC), which enhance the device's durability and reliability in automotive, industrial, and consumer electronics environments.

Employs BiCMOS technology for noise reduction and precise switching. Operates over a wide supply voltage range of 3.8 V to 24 V with built-in voltage regulator. Compact SOT-23 surface mount package with 3 pins. Automotive AEC-Q100 standard qualified for harsh environments.

Fast response time of 4 microseconds and low current consumption of 4.1 mA. Wide operating temperature range from -40°C to 85°C. Integrated protection against reverse battery and voltage transients. Ideal for motion sensing, position detection, and contactless switching applications.

This sensor is manufactured in the Philippines and is engineered to provide reliable and stable magnetic sensing for industrial, automotive, laboratory, and electronic component applications. Its robust design and compact footprint facilitate integration into modern PCB designs where space and performance are critical.

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