Main Features

• Highly flexible ProxFusion® device
• 9 (QFN) external sensor pad connections
• Configure up to 6 channels using the external connections
• External inductive sensor options:
  • Up to 6x self-capacitive buttons
  •  Up to 6x mutual-capacitive buttons
  • Up to 6x inductive buttons
• Built-in basic functions:
  • Gray-coded relative rotational encoder
  • Selectable channel reference
    • LTA as reference
    • select channel to use as reference
    • Fixed value as reference
  • Blocking channel
  • Automatic Tuning Implementation (ATI)
  • Noise filtering
  • Debounce & hysteresis
  • Dual direction trigger indication
• Built-in signal processing options:
  • Rotational encoder angle
  • Rotational encoder counter
  • Rotational encoder state
  • PC software for debugging and obtaining optimal settings and performance
  • Auto-run from programmed settings for simplified integration
•  Multi-level trigger implementation:
  • Adjustable number of trigger levels
  • Trigger event states
• Design simplicity
• Automated system power modes for optimal response vs consumption
• I2C communication interface with IRQ/RDY (up to fast plus – 1 MHz)
• I2C address selection using GPIO pin
• Event and streaming modes
• Customizable user interface due to programmable memory
• Supply voltage range:
  • 1.8 V to 3.5V (FOSC = 14 MHz)
  • 2.2 V to 3.5V (FOSC = 18 MHz)
• Small packages
  • QFN20 (3 x 3 x 0.5 mm) – 0.4mm pitch

Applications

• Waterproof inductive dial/counter applications
• Waterproof inductive buttons
• Integrated control panel (dial + buttons)
• White goods user interface
• Wearables
• Smart home controllers