36.2 Features

  • Low-power, high-sensitivity, environmentally robust capacitive touch buttons, sliders, and wheels
  • Supports wake-up on touch from Standby Sleep mode
  • Supports mutual capacitance and self-capacitance sensing
    • 6/10/16 buttons in self-capacitance mode, for 32-/48-/64- pins respectively
    • 60/120/256 buttons in mutual-capacitance mode, for 32-/48-/64- pins respectively
    • Mix-and-match mutual-and self-capacitance sensors
  • One pin per electrode – no external components
  • Load compensating charge sensing
    • Parasitic capacitance compensation and adjustable gain for superior sensitivity
  • Zero drift over the temperature and VDD range
    • Auto calibration and recalibration of sensors
  • Single-shot charge measurement
  • Hardware noise filtering and noise signal desynchronization for high conducted immunity
  • Selectable channel change delay allows choosing the settling time on a new channel, as required
  • Acquisition-start triggered by command or through auto-triggering feature
  • Low CPU utilization through interrupt on acquisition-complete