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AT42QT1110

Status: In Production

Features:

  • Up to 11 QTouch® channels
  • 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
  • AT42QT1110: 3V – 5.5V
  • AT42QT1111: 1.8V – 5.5V
  • 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
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Overview
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Device Overview

Summary

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

Additional 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
Parametrics
Name
Value
Product Type
Proximity/Keys/Slider
Input Channels
11
Max Number of Keys
11
Interface
SPI
Voltage Range
3.00V - 5.50V

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Notes
Proximity/Keys/Slider
$0.80
 

RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
AT42QT1110-AUR
0.338300
0.497500
32
TQFP
7x7x1.0mm
Matte Tin
e3
AT42QT1110-AZ
0.338300
0.497500
32
TQFP
7x7x1.0mm
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.

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