AT42QT1481_14 Datasheet, PDF (1/73 Pages) ATMEL Corporation – 48-Key QMatrix FMEA IEC/EN60730 Touch Sensor IC

Atmel AT42QT1481
48-Key QMatrix FMEA IEC/EN60730 Touch Sensor IC
DATASHEET
Features
 Number of keys:
 Up to 48
 Technology:
 Patented charge-transfer (transverse mode), with frequency hopping
 Key outline sizes:
 6 mm × 6 mm or larger (panel thickness dependent); widely different sizes and
shapes possible
 Key spacings:
 8 mm or wider, center to center (panel thickness dependent)
 Electrode design:
 Two-part electrode shapes (drive-receive); wide variety of possible layouts
 Layers required:
 One layer (with jumpers), two layers (no jumpers)
 Electrode materials:
 PCB, FPCB, silver or carbon on film, ITO on film
 Panel materials:
 Plastic, glass, composites, painted surfaces (low particle density metallic
paints possible)
 Adjacent Metal:
 Compatible with grounded metal immediately next to keys
 Panel thickness:
 Up to 50 mm glass, 20 mm plastic (key size dependent)
 Key sensitivity:
 Individually settable via simple commands over serial interface
 Signal processing:
 Self-calibration, auto drift compensation, noise filtering, Adjacent Key
Suppression^®
 Interfaces:
 UART
 SPI slave (4 MHz maximum clock rate)
 STATUS indication pin
 Debug output
 FMEA compliant design features
 IEC/EN/UL60730 compliant design features
 UL approval
 VDE compliance
 For use in both class B and class C safety-critical products
9621EX–AT42–07/2014