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.

Features

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

Applications

LCD, plasma, and LED TVs
GSM cellular telephones
- On-ear detection
- Touch keys
LED flashlights or headlamps
White goods and appliances
Office equipment, toys, sanitary ware
Flame-proof, hazardous environment human interface devices

Proximity detection for enabling backlight activation
Wake-up from standby applications
Replacement for electromechanical switches
Find-in-the-dark
Automotive
- Door pocket lighting
- Electric window control
GUI trigger on proximity detected

Azoteq IQS227D Capacitive Proximity & Touch Controller

Features

Applications

Schematic

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