QT1106-ISG

QT1106-ISG Datasheet


QT1106

Part Datasheet
QT1106-ISG QT1106-ISG QT1106-ISG (pdf)
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QT1106

QWHEEL /QSLIDE /QTOUCH IC

QT1106 charge-transfer ‘QT’ QTouchTM IC is a self-contained, patented
charge-transfer capacitive controller capable of detecting near-proximity or touch on up to seven electrodes and a wheel/slider. It allows electrodes to
24 23 22 21 20 19 18 17
project sense fields through any dielectric such as glass or plastic. These electrodes are laid out as a scroller e.g. a wheel or slider plus seven additional independent keys.

MOSI 25 MISO 26 SNSA 27

Each key channel can be tuned for a unique sensitivity level by simply

SNSA 28
changing a corresponding external Cs capacitor, whereas the wheel/slider’s SNSA 29
sensitivity can be changed dynamically through SPI commands. One key can SNSA1 30

QT1106 32-QFN
even be optimized for operation as a hand proximity sensor by increasing the SNSA2 31
proximity sensitivity for the corresponding channel.

SNSA3 32

SPREAD /RST VDD OSC

CHANGE

The wheel/slider uses a simple, inexpensive sensing element between three connection points. The QT1106 can report a single rapid touch anywhere along the sense elements, or it can track a finger moving along the wheel/slider’s surface in real time.
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By using the charge-transfer principle, this device delivers a level of performance clearly superior to older technologies yet is highly cost-effective. Spread-spectrum burst technology provides superior noise rejection.
16 SNSB2 15 SNSB3 14 13 SNSB 12 SNSB 11 SNSB 10 SNSB
9 SNSB5

AT A GLANCE

Number of keys Technology Key outline sizes Key spacings Key design Wheel size Slider size Wheel electrode design Slider electrode design Layers required Substrates Electrode materials Panel materials Adjacent Metal Key panel thickness Wheel/Slider panel thickness Key sensitivity Outputs Moisture tolerance Power Package Signal processing Applications Patents:
0 to 7, one slider or one wheel Patented spread-spectrum charge-transfer 5mm x 5mm or larger panel thickness dependent widely different sizes and shapes possible 6mm or wider, center to center panel thickness, human factors dependent Single solid or ring shaped electrodes wide variety of possible layouts Typically 30mm- 50mm diameter, resistored wheel up to 80mm diameter, typical width 12mm Typically 50mm-100mm length, typical width 12mm Resistorless/resistored design Resistorless/resistored design can be an arc or other irregular shape One layer substrate electrodes and components can be on same side FR-4, low cost CEM-1 or FR-2 PCB materials polyamide FPCB PET films, glass Copper, silver, carbon, ITO, virtually anything electrically conductive Plastic, glass, composites, painted surfaces nonconductive paints Compatible with grounded metal immediately next to keys Up to 15mm glass, 10mm plastic key size dependent Up to 4mm glass, 3mm plastic Adjustable via change in sampling capacitor Cs value SPI Good 2.8V ~ 5.0V 32-pin 5 x 5mm QFN RoHS compliant Self-calibration, auto drift compensation, noise filtering, patented Adjacent Key SuppressionTM Portable devices, domestic appliances and A/V gear, PC peripherals, office equipment AKS patented Adjacent Key Suppression QTouch patented Charge-transfer method QWheel /QSlide patented Charge-transfer method patent-pending QWheel/QSlide sensing configuration

AVAILABLE OPTIONS
-400C to +850C
32-QFN

QT1106-ISG

CCopyright 2006-2007 QRG Ltd

QT1106_8IR0.07_0907

Contents
1 Overview 3 Introduction 3 Burst Operation 3 User Interface Layout Options 3 Slider and Wheel Construction 3 QMagicTM Proximity Effect 3 SPI Interface 3 Basic Power Modes 4 Overview 4 Free Run Mode 4 LP Mode 4 Sleep Mode 4 Sync Mode 4
2 Signal Processing 4 Power-up Self-calibration 4 Drift Compensation 4 Detection Integrator Filter 4 AKSTM Adjacent Key Suppression 4 Autorecalibration MOD 4 QMagicTM Proximity Sensor 5 Faulty and Unused Keys 5 Wiring 6
3 SPI Interface 8 Introduction 8 CHANGE Pin 8 SPI Parameters 8 SPI Operation 8 SPI Host Commands 9 Overview 9 Normal Command Mode 9 Custom Threshold Command Mode 10 SPI Responses 10
4 Operating Modes 11 Introduction 11 Free Run Mode 11 LP Mode 11 Sleep Mode 12 Sync Mode 12
5 Reset 14 Introduction 14 Delay to SPI Functionality 14 Reset Delay to Touch Detection 14 Mode Setting After Reset 14
6 Design Notes 14 Oscillator Frequency 14 Spread-spectrum Circuit 14 Cs Sample Capacitors - Sensitivity 14 Rsns Resistors 15 Thermal Stability 15 Power Supply 15 PCB Layout and Construction 15
7 Specifications 16 Absolute Maximum Specifications 16 Recommended Operating Conditions 16 AC Specifications 16 DC Specifications 16 Signal Processing 17 Idd Curves 18 Mechanical Dimensions - 32-QFN Package 20 Part Marking 20 Moisture Sensitivity Level MSL 21
8 Datasheet Control 22 Changes 22 Numbering Convention 22

QT1106_8IR0.07_0907
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Datasheet ID: QT1106-ISG 519362