The IQS680 ProxFusion® IC is a multifunctional Capacitance, Passive Infrared Radial (PIR) & Inductance sensor designed for applications such as domestic energy efficient lighting applications with movement detection. The IQS680 is an ultra-low power solution designed for short or long term activations through any of the sensing channels. The IQS680 operates standalone or via the I2C protocol and custom configurations are stored in an on-chip EEPROM.

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PC Software: Download

Video: IQS680 Smart Sensor for lighting

Status: Production



  • Unique combination of sensors:
    • Capacitive sensing
    • Inductive sensing
    • PIR sensing


  • Capacitive sensing:
    • 2pF to 200pF external capacitive load capability
    • Fully adjustable sensing options
    • Self-capacitance


  • Inductive sensing:
    • Distinguish between ferrous and nonferrous metals
    • Only external sense coil required (PCB trace)


  • PIR Sensing:
    • DSP algorithm for long range movement detection.
    • Automatic drift compensation


  • Low power consumption:
    • 59 uA (100 Hz responce)
    • 23 uA (10 Hz responce)


  • Multiple integrated UI's
  • Automatic Tuning Implementation (ATI) – performance enhancement (10bit)
  • EEPROM included on-chip for calibration data and settings
  • Minimal external components
  • Standard I2C interface (polling with sub 1ms clock stretching)
  • Optional RDY indication for event mode operation
  • Supply voltage: 1.8V to 3.6V
  • Low profile DFN(3x3) - 10 pin package




  • Under Cabinet Lighting (UCL)
  • Standard PIR sensor cost reduction
  • Smart Lights
  • Night Lights
  • Battery powered PIR sensors solutions
  • Movement detection



Application Notes:

Novel way of PIR sensing with ProxFusion®