The IQS625 ProxFusion® IC is a multifunctional capacitance and Hall-effect sensor designed for applications where any or all of the technologies may be required. The Hall-effect sensors calculate the angle of a magnet rotating parallel with the sensor. The sensor is fully I2C compatible and on-chip calculations enable the IC to stream the current angle/interval of the magnet without extra calculations.625

Datasheet: View

Arduino Software: Download

GUI Software: Download

GUI Guide: Download

IQS624/5 Evaluation Kit Available

Status: Production



  • Hall Effect Sensor:
    • On-chip Hall plates
    • Absolute Wheel Interval Output
      • Up to 36 intervals
    • Raw data: can be used to calculate degrees on external processor
    • Wide operational range
    • No external components required


  • Partial auto calibration:Continuous auto-calibration, compensation for wear or small displacements of the sensor or magnet
    • Flexible gain control
    • Automatic Tuning Implementation (ATI) – performance enhancement (10bit)


  • Capacitive sensing:
    • Full auto-tuning with adjustable sensitivity
    • 2pF to 200pF external capacitive load capability


  • Multiple integrated UI
    • Proximity/Touch
    • Proximity wake-up
    • Event mode
    • Wake Hall sensing on proximity
    • Interval wake-up
  • Minimal external components
  • Standard I2C interface
  • Optional RDY indication for event mode operation
  • Low power consumption:
    • 240uA (100Hz response, Hall)
    • 55uA (100Hz response, capacitive)
    • 65uA (20Hz response, Hall)
    • 15uA (20Hz response, capacitive)
    • 5uA (5Hz response, capacitive)
    • Supply Voltage: 2V to 3.6V



  • Anemometer
  • Thermostat
  • Dial or Selector knob
  • Mouse wheel
  • Measuring wheel
  • Digital angle gauge
  • Speedometer for bicycle 


Product Selection Guide:

Options IQS624-30x-DNR2
IQS624-320x-DNR IQS624-50x-DNR1
Voltage 2V - 3.6V 2V - 3.6V 2.4V - 5.5V 2V - 3.6V
Software version 1 2 1 2
Interval UI No Yes No Yes
Advanced Degree Filtering No Yes No Yes
Advanced Wheel Wake-up No Yes No Yes
Hall Plate Calibration No Yes No Yes
I2C Configuration No Yes No Yes
Startup ATI Bug Fix No Yes No Yes
Extra Event Options No Yes No Yes


Applications Notes: