Touch Sensor 1 Key 1.8V to 5.5V Surface Mount 6-Pin SOT-23 T/R

The AT42QT1012 is a single key device featuring a touch on/touch off (toggle) output with a programmable auto switch-off capability The QT1012 is a digital burst mode charge-transfer sensor designed specifically for touch controls. It includes all hardware and signal processing functions necessary to provide stable sensing under a wide variety of changing conditions; only low cost, noncritical components are required for operation. With its tiny low-cost packages, this device can suit almost any product needing a power switch or other toggle-mode controlled function, especially power control of small appliances and battery-operated products. A unique “green” feature of the QT1012 is the timeout function, which can turn off power after a time delay. Like all QTouch devices, the QT1012 features automatic self-calibration, drift compensation, and spread-spectrum burst modulation in order to provide for the most reliable touch sensing possible.

• Number of Keys:
  • One, toggle mode (touch-on / touch-off), plus programmable auto-off delay and external cancel
  • Configurable as either a single key or a proximity sensor
• Technology:
  • Patented spread-s 6 mm x 6 mm or larger (panel thickness dependent); widely different sizes and shapes possible
• Electrode design:
  • Solid or ring electrode shapes
• PCB Layers required:
  • One
• Electrode materials:
  • Etched copper, silver, carbon, Indium Tin Oxide (ITO)
• Electrode substrates:
  • PCB, FPCB, plastic films, glass
• Panel materials:
  • Plastic, glass, composites, painted surfaces (low particle density metallic paints possible)
• Panel thickness:
  • Up to 12 mm glass, 6 mm plastic (electrode size and Cs dependent)
• Key sensitivity
  • Settable via external capacitor (Cs)
• Interface:
  • Digital output, active high or active low (hardware configurable)
• Moisture tolerance:
  • Increased moisture tolerance based on hardware design and firmware tuning
• Power:
  • 1.8 V – 5.5 V; 32 µA at 1.8 V
• Package:
  • 6-pin SOT23-6 (3 x 3 mm) RoHS compliant
  • 8-pin UDFN/USON (2 x 2 mm) RoHS compliant
• Signal processing:
  • Self-calibration, auto drift compensation, noise filtering