AT42QT2160_14 Datasheet, PDF (1/51 Pages) ATMEL Corporation – 16-key QMatrix Touch Sensor IC

Atmel AT42QT2160
16-key QMatrix Touch Sensor IC
DATASHEET
Features
 Number of keys:
 up to 16 keys, and one slider (constructed from 2 to 8 keys)
 Technology:
 patented spread-spectrum charge-transfer (transverse mode)
 Number of I/O lines:
 11 (3 dedicated – configurable for input or output, 8 shared – output only)
 PWM control for LED driving
 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)
 Slider design:
 2 to 8 keys placed in sequence, same design as keys
 Electrode design:
 two-part electrode shapes (drive-receive); wide variety of possible layouts
 PCB 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 3 mm glass, 2.5 mm plastic (key size dependent)
 Key sensitivity:
 individually settable via simple commands over I²C-compatible interface
 Interface:
 I²C-compatible slave mode (100 kHz)
 Moisture tolerance:
 Increased moisture tolerance based on hardware design and firmware tuning
 Signal processing:
 self-calibration, auto drift compensation, noise filtering
 Adjacent Key Suppression^® (AKS^®) technology
 Applications:
 Laptop, mobile, consumer appliances, PC peripheral
 This datasheet is applicable to revision 4R0 chips only
 Operating Voltage:
 1.8 V – 5.5 V
 Package:
 28-pin 4 × 4 mm QFN RoHS compliant
9502C–AT42–09/2014