Microchip Technology Inc

AT42QT1110

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
    3.0V - 5.5V
    Documentation
    Data Sheets
    05/01/2013
    655KB
      Application Notes
     
     
     
    AppNote
    11/01/2011
    1033KB
    AppNote
    10/01/2012
    278KB
    AppNote
    07/01/2014
    2509KB
    AppNote
    08/01/2010
    416KB
    AppNote
    10/01/2008
    64KB
    AppNote
    10/01/2008
    272KB
      Brochures
     
     
     
     
    Brochures
    12/10/2016
    4660KB
    Pricing & Samples
    All pricing shown in USD only.
    Part Number
    Leads
    Package Type
    Temp Range
    Packing
    1+
    26+
    100+
    1000+
    5000+
    Buy
    Sample
    AT42QT1110-AUR
    32
    TQFP
    -40C to +85C
    T/R
    1.10
    1.01
    0.91
    0.84
    0.80
    AT42QT1110-MUR
    32
    VQFN
    -40C to +85C
    T/R
    1.10
    1.01
    0.91
    0.84
    0.80

    ** Device not available to purchase online. Please contact a sales office for pricing information.
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    Notes
    Proximity/Keys/Slider
    $0.80
     
    Proximity/Keys/Slider
     
     
    RoHS Information
    Part
    Number
    Device
    Weight
    Shipping
    Weight
    Lead
    Count
    Package
    Type
    Package
    Width
    Solder
    Composition
    JEDEC
    Indicator
    RoHS
     
    China
    EFUP
    AT42QT1110-AZ
    0.338300
    0.497500
    32
    TQFP
    7x7x1mm
    Matte Tin
    e3
    AT42QT1110-AUR
    0.338300
    0.497500
    32
    TQFP
    7x7x1mm
    Matte Tin
    e3
    AT42QT1110-MUR
    0.060800
    0.061000
    32
    VQFN
    5x5x1mm
    Matte Tin
    e3
    To see a complete listing of RoHS data for this device, please Click here
    Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.