Si720x Switch/Latch Hall Effect Magnetic Position Sensor Data Sheet The Si7201/2/3/4/5/6 family of Hall effect magnetic sensors FEATURES switches and latches from Silicon Labs combines a chopper-stabi- lized Hall element with a low-noise analog amplifier, 13-bit analog- High-Sensitivity Hall Effect Sensor Maximum B operating point/minimum OP to-digital converter, and a flexible comparator circuit. Leveraging field strength of <1.1 mT Silicon Labs proven CMOS design techniques, the Si720x family Omnipolar or unipolar operation incorporates digital signal processing to provide precise compen- Integrated digital signal processing for sation for temperature and offset drift. temperature and offset drift compensation Compared with existing Hall effect sensors, the Si720x family offers industry-leading Low 400 nA Typical Current Consumption sensitivity, which enables use with larger air gaps and smaller magnets. For battery- at 5 samples per second powered applications, the Si720x family offers very low power consumption to improve Selectable Sensitivity, Hysteresis, Output operating life. Polarity and Sample Rate Sensitivity Drift < 3% over Temperature The Si720x devices are offered in 3-pin SOT23, 5-pin SOT23, and TO-92 packages, Wide Power Supply Voltage with power, ground, a single output pin that goes high or low as the magnetic field in- 1.71 to 5.5 V creases, 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 3.3 to 26.5 V high magnetic field. Selectable Output Options Open-drain output Digital high/low output Applications: Industry-Standard Packaging Camera image stabilization, zoom, Replacement of reed switches in con- Surface mount SOT-23 (3 or 5 pin) and autofocus sumer, and security applications Through hole TO-92 (3-pin) Fluid level sensing Position sensing of HVAC knob, door 1.4 x 1.6 mm 8-pin DFN package locks, windows, and other mechanical Control knobs and selector switches (coming soon) devices General-purpose mechanical position BLDC motor control sensing Hall Si7201/2/3/4/5/6 Element ADC DIS (Optional) Control Logic OUT1 Temp / Offset / OUT2 / TAMPERb VDD Reg Mechanical Stress (Optional) Compensation GND silabs.com Building a more connected world. Rev. 1.4 Table of Contents 1. Electrical Specifications ...........................3 2. Functional Description............................8 3. DISABLE Pin Timing ...........................10 4. Pin Description .............................11 5. Ordering Guide .............................13 6. Package Outline ............................. 21 6.1 SOT23 3-Pin Package ...........................21 6.2 SOT23-5 5-Pin Package...........................23 6.3 TO92S 3-Pin Package ...........................25 7. Land Patterns .............................. 26 7.1 SOT23 3-Pin PCB Land Pattern ........................26 7.2 SOT23-5 5-Pin PCB Land Pattern .......................27 8. Top Marking............................... 28 8.1 SOT23 3-Pin Top Marking..........................28 8.2 SOT23-5 5-Pin Top Marking .........................29 8.3 TO92 Top Marking.............................29 9. Revision History ............................. 30 silabs.com Building a more connected world. Rev. 1.4 2