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High-Performance Power ICs and Hall-Effect Sensors
Hall-Effect Sensors 
As the world leader in Hall-effect sensors, Allegro offers a broad line of silicon-based products that serve many high-end applications within automotive and industrial electronics.
Allegro's sensors are based on Hall-effect technology, which allows contactless sensing devoid of mechanical wear, sensing either an external magnet or a ferrous object. Specifically, Hall-effect sensors are used for highly accurate gear-tooth sensing, direction detection, linear sensing, speed sensing, position sensing and contactless switching.
Hall-Effect Sensor Selection Guides
- Bipolar Hall-Effect Digital
Switches
A1202, A1203, A1205, A3230 - BLDC Motor Drivers with
Integrated Hall for Commutation
A1441, A1442, A1444, A1445 - Current Sensors
ACS712, ACS713, ACS714, ACS715, ACS754, ACS755, ACS756, ACS760 - Dual Element
Speed and Direction Sensors for Ring Magnets
A3422, A3423, A3425 - Gear-Tooth Hall-Effect Speed
Sensors
A1642-I1, A1642-I2, ATS612LSG, ATS616, ATS625, ATS635, ATS636, ATS642, ATS643, ATS645, ATS651, ATS665, ATS673, ATS674, ATS675 - Hall-Effect Digital Latches
A1210, A1211, A1212, A1213, A1214, A1242-I1, A1242-I2, A3280, A3281, A3282, A3283, A3290, A3291 - Highly Accurate, Analog Speed Sensors
with Digital Outputs
A1421, A1422, A1423, A1425 - Linear Hall-Effect Sensors
A1301, A1302, A1321, A1322, A1323, A1351, A1360, A1361, A1362, A1373, A1374, A1381, A1382, A1383, A1384, A1391, A1392, A1393, A1395 - Omnipolar Hall-Effect
Digital Switches
A1171, A1172, A3211, A3212, A3213, A3214, A3245 - Unipolar Hall-Effect Digital
Switches
A1101, A1102, A1103, A1104, A1106, A1142, A1143, A1145, A1146, A1147, A1148, A1182, A1183, A1184, A1185, A1186, A3161, A3163, A3240, A3241, A3242, A3250, A3251, A3340