Microchip Technology Inc

AT42QT1111

In Production

The Microchip AT42QT111x standarized capacitive touch controller with configurable 11-key QTouch buttons with guard channels for reliable capacitive user interfaces. It can be used in any application that requires buttons. Its keys can be constructed in different shapes and sizes. The device includes all signal processing functions necessary to provide stable sensing under a wide variety of changing conditions. The outputs are fully debounced. Only a few external components are required for operation.

The 42AT1110 operates from 3V - 5.5V, whereas the 42QT1111 operates from 1.8V - 5.5V
The 42AT1110 features an "Extended Pulse Time" configuration

 

    Features

        • 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 AT42QT111x 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, configurable “Detect” outputs indicating individual key touch (7-key mode)
        • Device configuration can be stored in EEPROM
        • 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)
        • PCB 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 configurable via simple commands over serial interface
        • Patented Adjacent Key Suppression® (AKS®) technology to enable accurate key detection
        • Interface: Full-duplex SPI slave mode (1.5 MHz), CHANGE pin, discrete detection outputs
        • Increased moisture tolerance based on hardware design and firmware tuning
        • Power supply voltage:
          • AT42QT1110: 3V – 5.5V
          • AT42QT1111: 1.8V – 5.5V
        • Packages:
          • 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
    Parameter Name
    Value
    Product Type
    Proximity/Keys/Slider
    Input Channels
    11
    Max Number of Keys
    11
    Interface
    SPI
    Voltage Range
    1.8V - 5.5V
    Documentation
    Data Sheets
    05/01/2013
    657KB
      Application Notes
     
     
     
    AppNote
    11/01/2011
    1033KB
    AppNote
    10/01/2012
    278KB
    AppNote
    07/01/2014
    2509KB
    AppNote
    04/01/2015
    1151KB
    AppNote
    10/01/2008
    64KB
    AppNote
    10/01/2008
    272KB
      Brochures
     
     
     
     
    Brochures
    12/10/2016
    4660KB
    Development Tools
    • Demo & Eval Boards
    • QT1 Xplained Pro extension kit ( ATQT1-XPRO )

      QT1

      QT1 Xplained Pro kit is an extension kit that enables evaluation of self- and mutual capacitance mode using the Peripheral Touch Controller(PTC). The kit shows how easy it is to design a capacitive touch board solution using the PTC without the need for any external components. The kit includes two boards, one using self-capacitance and one using mutual capacitance.

    • SLCD1 Xplained Pro extension kit ( ATSLCD1-XPRO )

      SLCD1

      SLCD1 Xplained Pro is an extension kit with a 96-segment LCD display. It connects to Xplained Pro evaluation kits with segment LCD extension headers. For supported kits, see the related tools tab.

    • SAMC20 QTR Demo ( ATSAMC20-QTRDEMO )

      SAMC20

      The SAM C20 QTouch Robustness Evaluation kit demonstrates the high capacitive touch performance of the Peripheral Touch Controller (PTC) while achieving best-in-class conducted immunity and moisture tolerance required in home appliance and industrial applications.

      The demo is based on the QTouch Library.

      Key features:

        ...

    • QT2 Xplained Pro extension kit ( ATQT2-XPRO )

      QT2

      QT2 Xplained Pro is a QTouch Surface extension board for Xplained Pro boards that demonstrates the Peripheral Touch Controller (PTC) as a high performance touch-surface controller. The PTC controller uses very little power and resources from the MCU, which makes it easy to integrate touch surface support to your main project.

    • QT3 Xplained Pro extension kit ( ATQT3-XPRO )

      QT3

      QT3 Xplained Pro is a QTouch keypad extension board demonstrating an ultra-low power keypad design using the Peripheral Touch Controller (PTC). Utilizing the PTCs low power capabilities it enables markets lowest power wake-up on touch.

      Note: QT3 Xplained Pro requires a compatible Xplained Pro evaluation kit. See the Related Tools tab for supported models.

    • SAMD20 QTR Demo ( ATSAMD20-QTRDEMO )

      SAMD20

      The SAM D20 QTouch Robustness Evaluation kit demonstrates the high capacitive touch performance of the Peripheral Touch Controller (PTC) while achieving best-in-class conducted immunity and moisture tolerance required in home appliance and industrial applications.

      The demo is part of the QTouch Safety Platform, key features of the QTouch Safety Platform are:

    • QT6 Xplained Pro ( ATQT6-XPRO )

      QT6

      The QT6 Xplained Pro is a QTouch Surface extension board for Xplained Pro boards that demonstrates the Peripheral Touch Controller (PTC) as a high performance touch-surface controller. The PTC controller uses very little power and resources from the MCU, which makes it easy to integrate touch surface support to your main project.

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