Azoteq IQS227D Capacitive Proximity & Touch Controller

Azoteq IQS227D Single-Channel Capacitive Proximity and Touch Controllers are fully integrated self-capacitive sensors with dual outputs (touch and proximity outputs). Azoteq IQS227D is sub-5μA in low-power mode while sensing proximity and offers advanced on-chip digital signal processing. These sensors serve a wide variety of applications, including LCD/plasma/LED TVs, GSM cellular phones, LED flashlights, office equipment, and more.


  • Sub-5μA in low-power mode while sensing proximity
  • Automatic tuning implementation (ATI) – automatic tuning of sense electrode
  • Internal capacitor implementation (ICI) – reference capacitor on-chip
  • 2.4V to 5.5V supply voltage
  • Minimal external components
  • Advanced on-chip digital signal processing
  • User-selectable (OTP) – four power modes
    • I/O sink/source
    • Time-out for stuck key
    • Output mode (direct/latch/toggle)
    • Proximity and touch button sensitivity
  • RoHS2 compliant

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