Data Sheet

AT42QT1011
AT42QT1011 Data Sheet
Introduction
The AT42QT1011 is a digital burst mode charge-transfer sensor that is capable of detecting near
proximity or touch, making it ideal for implementing touch controls.
The QT1011 is designed specifically for human interfaces like control panels, appliances, toys, lighting
controls, or anywhere a mechanical switch or button may be found. It includes all hardware and signal
processing functions necessary to provide stable sensing under a wide variety of changing conditions.
Only a single low-cost capacitor is required for operation.
Features
• Number of Keys:
– One – configurable as either a single key or a proximity sensor
• Technology:
– Patented spread-spectrum charge-transfer (direct mode)
• Key outline sizes:
– 6 mm × 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 capacitor (Cs)
• Interface:
– Digital output, active high
• Moisture tolerance:
– Increased moisture tolerance based on hardware design and firmware tuning
• Operating Voltage:
© 2017 Microchip Technology Inc.
Datasheet
DS40001947A-page 1