Azoteq IQS7222A ProxFusion® ICs

Azoteq IQS7222A ProxFusion® ICs offer a 1.71V to 3.5V voltage range, ±4000V electrostatic discharge, and +85°C max. temperature rating. These sensors are fully I2C compatible, and feature on-chip calculations that enable multiple application options. These highly flexible ProxFusion devices can configure up to 9 channels using external connections or internal sensors. Azoteq IQS7222A ProxFusion ICs are ideal for waterproof buttons, wear detection, SAR compliance in mobile devices, and HALL-effect dock detection.


  • Highly flexible ProxFusion device
  • 12 sensor pad connections (QFN-20) / 10 sensor pad connections (WLCSP-18)
  • Configure up to 9 Channels using the external connections or internal sensor
  • External Sensor Options
    • Up to 8 self capacitive touch/proximity sensors with additional distributed sensor pads
    • Up to 9 projected capacitive touch/proximity sensors
    • Up to 4 inductive sensor elements
  • Internal sensor option
    • HALL-effect switch
  • Built-in basic functions
    • Automatic tuning
    • Noise filtering
    • Differential measurements
    • Debounce and hysteresis
    • Dual direction trigger indication
  • Built-in signal processing options
    • Slider output (0-255)
    • Gesture functions (swipe, tap, hold)
  • 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
  • 1.8V to 3.5V supply voltage
  • Small Packages
    • WLCSP18 (1.62mm x 1.62mm x 0.5mm) - interleaved 0.4mm x 0.6mm ball pitch
    • QFN20 (3.0mm x 3.0mm x 0.5mm) - 0.4mm pitch


  • SAR compliance in mobile devices
  • Wear detection
  • Appliance user interface (slider and buttons)
  • Waterproof buttons (inductive)
  • Low power wake-up buttons/proximity
  • HALL-effect dock detection

Block Diagram

Azoteq IQS7222A ProxFusion® ICs
Publicado: 2021-06-21 | Actualizado: 2022-09-29