AT42QT1040_14 Datasheet, PDF (1/22 Pages) ATMEL Corporation – Four-key QTouch Touch Sensor IC

Atmel AT42QT1040
Four-key QTouch^® Touch Sensor IC
DATASHEET
Features
 Number of QTouch^® Keys:
 Up to four
 Discrete Outputs:
 Four discrete outputs indicating individual key touch
 Technology:
 Patented spread-spectrum charge-transfer (direct mode)
 Electrode Design:
 Simple self-capacitance style (refer to the Touch Sensors Design Guide)
 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 10 mm glass, 5 mm plastic (electrode size dependent)
 Key Sensitivity:
 Fixed key threshold, sensitivity adjusted via sample capacitor value
 Adjacent Key Suppression
 Patented Adjacent Key Suppression^® (AKS^®) technology to enable accurate
key detection
 Interface:
 Pin-per-key outputs, plus debug mode to observe sensor signals
 Moisture Tolerance:
 Increased moisture tolerance based on hardware design and firmware tuning
 Signal Processing:
 Self-calibration, auto drift compensation, noise filtering
 Applications:
 Mobile, consumer, white goods, toys, kiosks, POS, and so on
 Power:
 1.8 V – 5.5 V
 Package:
 20-pin 3 x 3 mm VQFN RoHS compliant
9524D–AT42–05/2013