Microchip AT42QT1085 Handleiding

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9625D–AT42–05/2013

Features

QTouch® Sensor Channels

Up to eight keys

Integrated Haptic Engine

Haptic events may be triggered by touch detection or controlled by a host

microcontroller over SPI

Data Acquisition

QTouchADC key measurement/touch detection method

Configurable measurement timing and averaging

Spread spectrum charge transfer

Raw data from channel measurement can be read over the SPI interface

GPIO Pins

12 dedicated bi-directional GPIO pins, plus up to 4 additional pins (replacing keys)

Configurable as software PWM Drive, digital inputs or outputs

Device setup

Device configuration may be stored in NVRAM

Operation

Power-On reset and brown-out detection

Internal calibrated oscillator

Key Outline Sizes

6 mm × 6mm or larger (panel thickness dependent); widely different sizes and shapes

possible, including solid or ring shapes

Key Spacing

7 mm or more, center to center (panel thickness dependent)

Layers required

One

Electrode Materials:

Etched copper, silver, carbon, ITO

Electrode Substrates:

PCB materials; polyamide FPCB; PET 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 configured over SPI interface

Signal Processing:

Self-calibration, auto drift compensation, noise filtering

Patented Adjacent Key Suppression

® (AKS®) technology to ensure accurate key

detection

Interface:

Master/Slave SPI interface, up to 750 kHz

Object-based communications protocol

Power:

2.0V to 5.5 V

Packages:

32-pin 5 × 5 mm QFN RoHS compliant

32-pin 7 × 7 mm TQFP RoHS compliant

Atmel AT42QT1085

Eight-key QTouch® Touch Sensor IC

DATASHEET

Product specificaties