AT42QT1111-MU_14 Datasheet, PDF (1/50 Pages) ATMEL Corporation – 11-key QTouch Touch Sensor IC

Atmel AT42QT1111-MU
AT42QT1111-AU
11-key QTouch^® Touch Sensor IC
Features
DATASHEET
 Sensor Keys:
 Up to 11 QTouch^® channels
 Data Acquisition:
 Measurement of keys triggered either by a signal applied to the SYNC pin or at
regular intervals timed by the AT42QT1111 internal clock
 Keys measured sequentially for better performance, or in parallel groups for faster
operation
 Raw data for key touches can be read as a report over the SPI interface
 Discrete Outputs:
 Configurable “Detect” outputs indicating individual key touch (7-key mode)
 Device Setup:
 Device configuration can be stored in EEPROM
 Technology:
 Patented 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 shapes
 Key Spacings:
 7 mm center-to-center or more (panel thickness dependent)
 Layers Required:
 One
 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:
 Individually settable via simple commands over serial interface
 Adjacent Key Suppression^® (AKS^®)
 Patented AKS technology to enable accurate key detection
 Interface:
 Full-duplex SPI slave mode (750 kHz), CHANGE pin, discrete detection outputs
 Moisture Tolerance
 Increased moisture tolerance based on hardware design and firmware tuning
 Power:
 1.8 V – 5.5 V
 Package:
 32-pin 5 × 5 mm QFN RoHS compliant
 32-pin 7 × 7 mm TQFP RoHS compliant
 Signal Processing:
 Self-calibration, auto drift compensation, noise filtering, AKS technology
 Applications:
 Consumer and industrial applications, such as TV, media player
9571C–AT42–05/2013