QT  -  Series DataSheet
QT60160  -  16 AND 24 KEY QMATRIX? TOUCH SENSOR ICs  -  Atmel  -  Touch Technology

These devices are designed for low cost mobile and consumer electronics applications.
QMatrix™ technology employs transverse charge-transfer sensing electrode designs which can be made very compact and are easily wired. Charge is forced from an emitting electrode into the overlying panel dielectric, and then collected on a receiver electrode which directs the charge into a sampling capacitor which is then converted directly to digital form without the use of amplifiers.
Keys are configured in a matrix format that minimizes the number of required scan lines and device pins. The key electrodes can be designed into a conventional Printed Circuit Board (PCB) or Flexible Printed Circuit Board (FPCB) as a copper pattern, or as printed conductive ink on plastic film.

AT A GLANCE
Number of keys: 1 to 16 (QT60160), or 1 to 24 (QT60240)
Technology: Patented spread-spectrum charge-transfer (transverse mode)
Key outline sizes: 6mm x 6mm or larger (panel thickness dependent); widely different sizes and shapes possible
Key spacings: 8mm 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, Orgacon † ink 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 50mm glass, 20mm plastic (key size dependent)
Key sensitivity: Individually settable via simple commands over serial interface
Interface: I2C slave mode (100kHz), or parallel output via external shift registers
Moisture tolerance: Best in class.
Power: 1.8V ~ 5.5V, 40μA (16 keys at 1.8V, 2s Low Power mode). Guaranteed to 1.62V.
Package: 32-pin 5 x 5mm MLF RoHS compliant
Signal processing: Self-calibration, auto drift compensation, noise filtering, Adjacent Key Suppression TM
Applications: Mobile phones, remote controls, domestic appliances, PC peripherals, automotive