DESCRIPTION

· The Si720x family from Silicon Labs includes Hall effect magnetic sensors (Si7201/2/3/4/5/6) with chopper-stabilized Hall elements, low-noise amplifiers, 13-bit ADCs, and flexible comparators.
· These sensors feature digital signal processing for precise temperature and offset drift compensation.
· Available in 3-pin SOT23, 5-pin SOT23, and TO-92 packages, with options for power, ground, output, disable, and tamper pins.
· Designed for high sensitivity, enabling use with larger air gaps and smaller magnets, and optimized for low power consumption in battery-powered applications.

FEATURES

· High-sensitivity Hall effect sensor with a maximum B OP operating point of <1.1 mT.
· Omnipolar or unipolar operation.
· Integrated digital signal processing for temperature and offset drift compensation.
· Low current consumption of 400 nA at 5 samples per second.
· Selectable sensitivity, hysteresis, output polarity, and sample rate.
· Sensitivity drift < ±3% over temperature.
· Wide power supply voltage range: 1.71 to 5.5 V or 3.3 to 26.5 V.
· Selectable output options: open-drain or digital high/low.
· Industry-standard packaging: SOT-23 (3 or 5 pin) and TO-92 (3-pin).

APPLICATIONS

· Replacement of reed switches in consumer and security applications.
· Position sensing for HVAC knobs, door locks, windows, and other mechanical devices.
· BLDC motor control.
· Camera image stabilization, zoom, and autofocus.
· Fluid level sensing.
· Control knobs and selector switches.
· General-purpose mechanical position sensing.