AT42QT1110-MU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT42QT1110-MU

11-key QTouch® Touch Sensor IC

Atmel Corporation 

Atmel AT42QT1110-MU

AT42QT1110-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 AT42QT1110 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 (1.5 MHz), CHANGE pin, discrete detection outputs

 Moisture Tolerance

 Increased moisture tolerance based on hardware design and firmware tuning

 Power:

 3 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

9520J–AT42–05/2013

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