Silicon Labs Sensors, Transducers - Magnetic Sensors - Switches (Solid State) SI7201-B-22-IV

The Si7201 is a Hall effect magnetic sensor switch designed for precision position sensing in battery-powered applications, offering omnipolar operation and low power consumption. It is available in a 3-pin SOT-23 package with dimensions consistent with standard SOT-23-3 form factor. The device operates from a supply voltage of 1.71 V to 5.5 V, with a typical current draw of 400 nA at 5 samples per second. It features a maximum operating point of less than 1.1 mT, temperature drift of sensitivity under ±3%, and an open-drain digital output. The part supports selectable sensitivity, hysteresis, output polarity, and sample rate, and is rated for operation from -40°C to +125°C. Tamper indication is achieved by the output returning to its zero-field state at high magnetic field.