Description:Up to 11 QTouch® channelsMeasurement of keys triggered either by a signal applied to the SYNC pin or at regular intervals timed by the AT42QT111x internal clockKeys measured sequentially for better performance, or in parallel groups for faster operationRaw data for key touches can be read as a report over the SPI interfaceDiscrete, configurable “Detect” outputs indicating individual key touch (7-key mode)Device configuration can be stored in EEPROMPatented spread-spectrum charge-transfer (direct mode)Key outline sizes: 6 mm × 6 mm or larger (panel thickness dependent); widely different sizes and shapes possible, including solid or ring shapesKey Spacings: 7 mm center-to-center or more (panel thickness dependent)PCB layers required: OneElectrode materials: Etched copper, silver, carbon, Indium Tin Oxide (ITO)Electrode substrates: PCB, FPCB, plastic films, glassPanel materials: Plastic, glass, composites, painted surfaces (low particle density metallic paintspossible)Panel thickness: Up to 10 mm glass, 5 mm plastic (electrode size dependent)Key sensitivity individually configurable via simple commands over serial interface
Patented Adjacent Key Suppression® (AKS®) technology to enable accurate key detectionInterface: Full-duplex SPI slave mode (1.5 MHz), CHANGE pin, discrete detection outputsIncreased moisture tolerance based on hardware design and firmware tuningAT42QT1110: 3V – 5.5VAT42QT1111: 1.8V – 5.5V32-pin 5 × 5 mm QFN RoHS compliant32-pin 7 × 7 mm TQFP RoHS compliantSignal Processing: Self-calibration, auto drift compensation, noise filtering, AKS technologyApplications: Consumer and industrial applications, such as TV, media player