30.2 Feature

The following are key features of the PTC module:

  • Low-Power, High-Sensitivity, Environmentally Robust Capacitive Touch Buttons, Sliders, and Wheels
    • Down to 8 μA with 200 ms scan rate
  • Supports Wake-up on Touch from standby Sleep mode
  • Supports Mutual Capacitance and Self Capacitance Sensing
    • Up to 16 buttons in self-capacitance mode
    • Up to 256 buttons in mutual-capacitance mode
  • 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 AVDD 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