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Home » Product Knowledge Center » Azoteq IQS127D / IQS128 Proximity / Touch Controllers
Azoteq IQS127D / IQ128 ProxSense™ Capacitive Proximity / Touch Controllers
Azoteq IQS127D / IQS128 ProxSense™ Capacitive Proximity / Touch Controllers

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Azoteq IQS127D / IQS128 ProxSense™
Capacitive Proximity / Touch Controllers

The Azoteq IQS127D and IQS128 are high-performance IQ Switch® - ProxSense™ Single-Channel Capacitive Proximity/Touch Controllers. Azoteq IQS127D ProxSense features dual touch and proximity outputs and Automatic Antenna Tuning Implementation (ATI) for automatic adjustment for optimal performance. The IQS128 features Dynamic Calibration (DYCAL™) technology, providing intelligent hysteresis to allow for sensor drift even during sensor activation. Azoteq IQS127D and IQS128 single-channel capacitive proximity/touch controllers feature Internal Capacitor Implementation (ICI) reference capacitor on-chip. The IQS127D is designed for use in LCD, Plasma, and LED TVs, GSM cell phones (on ear detection / touch keys), LED flashlights or head lamps, and more. The IQS128 is optimized for 3-D glasses, occupancy sensors, personal media players, and more.

IQS127D Features
  • Dual outputs (Touch and Proximity outputs)
  • Automatic Antenna Tuning Implementation (ATI) - Automatic adjustment for optimal performance.
  • Internal Capacitor Implementation (ICI) - reference capacitor on-chip
  • Supply voltage: 2V to 5.5V
  • Minimum external components
  • Data streaming option
  • Advanced on-chip digital signal processing
  • User selectable (OTP):
    • 4 Power Modes (15uA min)
    • IO sink / source
    • Time-out for stuck key
    • Output mode (Direct / Latch / Toggle)
    • Proximity and Touch Button sensitivity
IQS127D Applications
  • LCD, Plasma & 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 that enables backlighting activation
IQS128 Features
  • DYCAL™ : Intelligent Hysteresis
  • Internal Capacitor Implementation (ICI) - reference capacitor on-chip
  • Automatic Antenna Tuning Implementation (Auto-ATI) - Automatic adjustment for optimal sensor performance
  • Supply voltage: 2.95V to 5.5V
  • Minimum external components
  • 1-Wire open drain data streaming option
  • Advanced on-chip digital signal processing
  • User selectable (OTP):
    • External synchronisation control or
    • External control over filter operation
    • I/O Sink or Source selection Time-out for stuck key Proximity and Touch sensitivity selections
IQS128 Applications
  • Occupancy sensors
  • SAR qualification for Tablet PCs
  • On-ear detection for mobile phones
  • 3D glasses
  • Personal Media Players
  • White goods and appliances
  • Human Interface Devices
  • Proximity activated backlighting

IQS127D Schematic
IQS127D Schematic


IQS128 Schematic
IQS128 Schematic
  • Azoteq
  • Sensing
  • Semiconductors|Embedded Processors|IC-MCU/MPU|Sensors