Touch Sensor Capacitive 6 Key 1.8V to 5.5V Surface Mount 28-Pin QFN

The AT42QT1060 is a digital burst mode charge-transfer (QT) capacitive sensor driver designed specifically for mobile phone applications. The device can sense from two to six keys; up to four keys can be disabled by not installing their respective sense capacitors (Cs). It also has up to seven configurable input/output lines, with Pulse Width Modulation (PWM) for driving LEDs. This device includes all signal processing functions necessary to provide stable sensing under a wide variety of changing conditions, and the outputs are fully de-bounced. Only a few external parts are required for operation. The QT1060 modulates its bursts in a spread-spectrum fashion in order to heavily suppress the effects of external noise, and to suppress RF emissions.

• Configurations:
  • Can be configured as a combination of keys and input/output lines
• Number of QTouch® Keys:
  • Two to six
• Number of I/O Lines:
  • Seven, configurable for input or output, with PWM control for LED driving
• Technology:
  • Patented spread-spectrum charge-transfer (direct mode)
• Key Outline Sizes:
  • 6 mm x 6 mm or larger (panel thickness dependent); widely different sizes and shapes possible
• Layers Required:
  • One
• Electrode Materials:
  • Etched copper
  • Silver
  • Carbon
  • Indium Tin Oxide (ITO)
• Panel Materials:
  • Plastic
  • Glass
  • Composites
  • Painted surfaces (low particle density metallic paints possible)