The IQS7222C ProxFusion® IC is a sensor fusion device for various multi-button applications. The sensor is fully I2C compatible and on-chip calculations enable the IC to respond effectively even in lowest power modes.

Main Features

  • Highly flexible ProxFusion® device
  • 9 (QFN) / 8 (WLCSP) external sensor pad connections
  • Configure up to 10 Channels using the external connections
  • External sensor options:
    • Up to 8 self capacitive buttons
    • Up to 4 self capacitive wear detection pairs (with physical reference)
    • Up to 10 projected capacitive touch/proximity sensors
    • Up to 4 inductive sensor elements
  • Built-in basic functions:
    • Automatic tuning
    • Noise filtering
    • Differential measurements (reference channels)
    • Debounce & Hysteresis
    • Dual direction trigger indication
  • Built-in Signal processing options:
    • Slider output
    • Wheel output
  • Design simplicity
    • PC Software for debugging and obtaining optimal settings and performance
    • One-time programmable settings for custom power-on IC configuration
    • Auto-run from programmed settings for simplified integration
  • Automated system power modes for optimal response vs consumption
  • I2C communication interface with IRQ/RDY(up to fast plus -1MHz)
  • Event and streaming modes
  • Customizable user interface due to programmable memory
  • Supply Voltage 1.8V(-5%)to 3.5V
  • Small packages
    • WLCSP18 (1.62 x 1.62 x 0.5 mm) - interleaved 0.4mm x 0.6mm ball pitch
    • QFN20 (3 x 3 x 0.5 mm) - 0.4mm pitch


  • SAR Compliance in Mobile devices
  • Waterproof Buttons (Inductive)
  • Wear Detection
  • Low power Wake-up Buttons / Proximity
  • Appliance user interface (Sliders, Wheels & Buttons)
We’ve done it before.
If you don’t believe us test it yourself.


  • 1x IQS7222C stamp

Embed into custom design and interface to host MCU to evaluate capacitive functions.

NOTE: Arduino Uno/ST Nucleo not included. CT210/A sold separately.


  • 1x IQS7222A Stamp
  • 1x IQS7222B Stamp
  • 1x IQS7222C Stamp
  • 1x IQS7222D Stamp
  • 1x Twenty button plugin
  • 1x Buttoned scroll plugin
  • 1x Inductive coil and slider plugin
  • 5x IQS7222X Chips
  • 1x CT210A debug and display tool

Connect the plugins to your computer via CT210/A to evaluate capacitive and inductive functions with our GUI software.

NOTE: Arduino Uno/ST Nucleo not included.

Azoteq provides software used for the serial streaming of data to a computer utilising the Azoteq USB-dongles. Each IC has its own dedicated software and is intended for prototyping purposes and can be found on the Azoteq website under Software and Tools.

Feel free to order us around.
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