SILICON LABS SI7201-B-03-IV

The Si7201/2/3/4/5/6 family of Hall effect magnetic sensors switches and latches combines a chopper-stabilized Hall element with a low-noise analog amplifier, 13-bit analog-to-digital converter, and a flexible comparator circuit. Leveraging proven CMOS design techniques, the Si720x family incorporates digital signal processing to provide precise compensation for temperature and offset drift. Compared with existing Hall effect sensors, the Si720x family offers industry-leading sensitivity, which enables use with larger air gaps and smaller magnets. For battery-powered applications, the Si720x family offers very low power consumption to improve operating life. The Si720x devices are offered in 3-pin SOT23, 5-pin SOT23, and TO-92 packages, with power, ground, a single output pin that goes high or low as the magnetic field increases, and with the 5-pin parts a disable(sleep) pin, and a tamper output pin. With the three-pin package, tamper indication is by the pin going back to its zero field level at high magnetic field.

• High-Sensitivity Hall Effect Sensor
• Maximum BOP operating point/minimum field strength of < 1.1 mT
• Omnipolar or unipolar operation
• Integrated digital signal processing for temperature and offset drift compensation
• Low 400 nA Typical Current Consumption at 5 samples per second
• Selectable Sensitivity, Hysteresis, Output Polarity and Sample Rate
• Sensitivity Drift < ±3% over Temperature
• Wide Power Supply Voltage: 1.71 to 5.5 V; 3.3 to 26.5 V
• Selectable Output Options: Open-drain output; Digital high/low output
• Industry-Standard Packaging: Surface mount SOT-23 (3 or 5 pin); Through hole TO-92 (3-pin); 1.4 × 1.6 mm 8-pin DFN package (coming soon)

• Replacement of reed switches in consumer, and security applications
• Position sensing of HVAC knob, 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