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Silicon Labs Si720x & Si721x Hall Effect Magnetic Sensors

Silicon Labs Si720x and Si721x Hall Effect Magnetic Position Sensors combine a chopper-stabilized Hall element with a low-noise analog amplifier and 13-bit analog to digital converter. The sensors have proven CMOS design techniques and incorporate digital signal processing for precise temperature and offset drift compensation. The Si720x and Si721x enable use with larger air gaps and smaller magnets and are AEC-Q100 qualified for automotive applications.

Features

  • Common Features
    • High-sensitivity Hall-Effect sensor
    • Integrated digital signal processing for temperature and offset drift compensation
    • Low 400nA typical standby current consumption
    • Wide power supply voltage
      • 1.7V to 5.5V
      • 3.3V to 26.5V
    • AEC-Q100 qualified for automotive applications
    • Industry-Standard packaging
      • Surface-mount SOT-23 (3 or 5 pin)
      • Through hole TO-92 (3-pin)
  • Si7201/02/03/04/05/06 Features
    • Maximum BOP operating point/minimum field strength of < 1.1mT
    • Omnipolar or unipolar operation
    • Selectable / Programmable Sensitivity, Hysteresis, Output Polarity and Sample Rate
    • Sensitivity Drift < ±3% over Temperature
    • Selectable Output Options
      • Open-drain output
      • Digital high/low output
      • 2-wire current source
  • Si7210 Features
    • Adjustable Full Scale (Standard Offerings are ±20mT and ±200 mT Full Scale)
    • High-Precision 13-bit Signal Path
    • Output Bandwidth up to 20 kHz
    • Sensitivity Drift < ±5% over 0-70°C
    • Digital I2C Interface
      • Four Selectable I2C Addresses
      • Optional Digital Alert Output
    • Temperature Sensor Data also available by I2C (accuracy ±1°C)
    • Low 50nA Sleep Mode Current Consumption
  • Si7211/12/13/14/15/16 Features
    • Low noise output corresponding to magnetic field
    • Configurable Sensitivity, Output Polarity and Sample Rate
    • Sensitivity Drift < ±3% Over Temperature
    • Configurable output options
      • Analog (1.7 to 5.5V VDD)
      • PWM
      • SENT

Applications

  • Mechanical position sensing in consumer, industrial and automotive applications
  • Camera image stabilization, zoom, and auto focus
  • Fluid level sensing
  • Control knobs and selector switches
  • Replacement of reed switches in consumer, automotive, and security applications
  • Automotive position sensing of HVAC valve,headrest, seat track, side mirrors, sunroof, door locks, and other mechanical devices
  • BLDC motor control

Associated Development Tool

Silicon Labs Si72xx-WD-Kit Evaluation Kit

Used to evaluate the Si72xx Hall Sensor through eight demos preloaded on the EFM32 Happy Gecko STK.

Learn Moreacerca de Silicon Labs Si72xx-WD-Kit Evaluation Kit View Productsrelacionado con Silicon Labs Si72xx-WD-Kit Evaluation Kit
Publicado: 2017-06-21 | Actualizado: 2025-12-05