SI7212-B-00-IV Silicon Labs

Si721x Field Output Hall Effect Magnetic Position Sensors Data Sheet The Si7211/2/3/4/5/6/7 family of Hall-effect sensors from Silicon Labs combines a chop- per-stabilized Hall element with a low-noise analog amplifier, 13-bit analog to digital con- FEATURES verter. After A/D conversion the magnetic field data is available in analog. PWM or SENT format (depending on the part number). Leveraging Silicon Labs proven CMOS High-sensitivity Hall-Effect Sensor design techniques, the Si721x family incorporates digital signal processing to provide Low noise output corresponding to magnetic field precise compensation for temperature and offset drift. Integrated digital signal processing for Compared with existing Hall-effect sensors, the Si721x family offers industry-leading temperature and offset drift sensitivity and low noise, which enables use with larger air gaps and smaller magnets. compensation Low 50 nA Typical Sleep Current In the simplest case, the Si721x devices are offered in a 3 pin SOT23 or TO92 pack- Consumption ages with power, ground, and a single output pin that is signal corresponding to the Configurable Sensitivity, Output Polarity magnetic field in analog, PWM, or SENT format. and Sample Rate Sensitivity Drift < 3% Over Temperature The Si721x devices are also offered in a 5 pin SOT23 and an 8 pin DFN(coming soon) packages where the additional pins can be used for sleep mode (DIS) or to activate an Wide power supply voltage on-chip coil for built in self-test (BISTb). 1.7 to 5.5 V 3.3 to 26.5 V Applications Configurable output options Fluid level sensing Mechanical position sensing in consum- Analog er, industrial applications Control knobs and selector switches PWM Camera image stabilization, zoom, and SENT autofocus Industry-Standard Packaging Surface-mount SOT-23 (3 or 5 pin) TO92 package DFN package (coming soon) Hall Hall Si7211/17 Si7212/13/14/15 Element Element ADC ADC DIS (Optional) DIS (Optional) Control Logic VOUT Control Logic PWM/SENT OUT Temp / Offset / Temp / Offset / ALERT/BIST ALERT/BIST Reg Mechanical Stress Reg Mechanical Stress VDD VDD (OPTIONAL) (OPTIONAL) Compensation Compensation GND GND silabs.com Building a more connected world. Rev. 1.3 Table of Contents 1. Electrical Specifications ...........................3 2. Functional Description............................9 3. Analog Output.............................. 10 4. PWM Output Description .......................... 11 5. SENT Output .............................. 12 5.1 tSENT Status Nibble............................12 5.2 SENT Data Nibbles ............................13 5.3 CRC Calculation .............................13 5.4 SENT Pause Pulse ............................13 5.5 SENT Frame Rate.............................13 5.6 BIST Activation During SENT Operation .....................13 6. Pin Description .............................14 7. Ordering Guide .............................16 8. Package Outline ............................. 18 8.1 SOT23 3-Pin Package ...........................18 8.2 SOT23-5 5-Pin Package...........................20 8.3 TO92S 3-Pin Package ...........................22 9. Land Patterns .............................. 23 9.1 SOT23 3-Pin PCB Land Pattern ........................23 9.2 SOT23-5 5-Pin PCB Land Pattern .......................24 10. Top Marking .............................. 25 10.1 SOT23 3-Pin Top Marking .........................25 10.2 SOT23-5 5-Pin Top Marking.........................26 10.3 TO92 Top Marking ............................26 11. Revision History............................. 27 silabs.com Building a more connected world. Rev. 1.3 2