QT1081-ISG

QT1081-ISG Datasheet

QT1081

Part	Datasheet
QT1081-ISG	QT1081-ISG (pdf)

PDF Datasheet Preview
QT1081 8-KEY QTOUCH SENSOR IC DETECT SYNC/LP VSS SNS7K SNS7 SNS6K SNS6 SNS5K The QT1081 is an improved, lower cost, simplified circuit version of the popular QT1080 sensor IC. The QT1081 is designed for low cost appliance, mobile, and consumer electronics applications. QTouch technology is a type of patented charge-transfer sensing method well known for its robust, stable, EMC-resistant characteristics. It is the only all-digital capacitive sensing technology in the market today. This technology has over a decade of applications experience spanning thousands of designs. QTouch circuits are renowned for simplicity, reliability, ease of design, and cost effectiveness. QTouch sensors employ a single reference capacitor tied to two pins of the chip for each sensing key a signal trace leads from one of the pins to the sensing electrode which forms the key. The sensing electrode can be a simple solid shape such as a rectangle or circle. An LED can be placed near or inside the solid circle for illumination. The key electrodes can be designed into a conventional printed circuit board PCB or flexible printed circuit board FPCB as a copper pattern, or as printed conductive ink. The QT1081 is also compatible with clear films to make simple button-style touch screens over LCD displays. SS /RST VDD OSC N/C SNS0 SNS0K SNS1 24 23 22 21 20 19 18 17 OUT_0 25 16 SNS5 OUT_1 26 15 SNS4K OUT_2 27 14 SNS4 OUT_3 28 OUT_4 29 QT1081 32-QFN 13 SNS3K 12 SNS3 OUT_5 30 11 SNS2K OUT_6 31 10 SNS2 OUT_7 32 9 SN1K 1 2345 6 7 8 AT A GLANCE Number of keys Technology Key outline sizes Key spacings Electrode design Layers required Substrates Electrode materials Panel materials Adjacent Metal Panel thickness Key sensitivity Outputs Moisture tolerance Power Package Signal processing Applications Patents: 1 to 8 Patented spread-spectrum charge-transfer one-per-key mode 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 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, Orgacon† ink virtually anything electrically conductive Plastic, glass, composites, painted surfaces low particle density metallic paints possible Compatible with grounded metal immediately next to keys Up to 50mm glass, 20mm plastic key size dependent Settable via change in reference capacitor Cs value Parallel discrete output, one-per-key, active-high Good 2.8V ~ 5.0V, <15µA 8 keys at 2.8V, 340ms Low Power mode . 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 †Orgacon is a registered trademark of Agfa-Gevaert N.V AVAILABLE OPTION -40oC to +85oC 32-QFN QT1081-ISG Copyright 2006-2007 QRG Ltd QT1081_1R0.04_0307 Contents 1 Overview 3 Differences With QT1080 3 Parameters 3 Introduction 3 Burst Operation 3 Self-calibration 3 Autorecalibration 3 Drift Compensation 3 Detection Integrator Confirmation 3 Spread-spectrum Operation 3 Sync Mode 3 Low Power LP Mode 3 Adjacent Key Suppression AKS 3 Outputs 4 Simplified Mode 4 Wiring 5 2 Device Operation 8 Start-up Time 8 Option Resistors 8 One-per-key Output Mode 8 Binary Coded Output Mode 8 DETECT Pin 8 SYNC/LP Pin 8 AKS Function Pins 9 MOD_0, MOD_1 Inputs 9 Fast Detect Mode 9 Simplified Mode 10 Unused Keys 10 3 Design Notes 11 Oscillator Frequency 11 Spread-Spectrum Circuit 11 Cs Sample Capacitors - Sensitivity 11 Power Supply 11 PCB Layout and Construction 11 4 Specifications 12 Absolute Maximum Specifications 12 Recommended Operating Conditions 12 AC Specifications 12 DC Specifications 12 Signal Processing 13 Average Idd Curves 14 LP Mode Typical Response Times 15 Mechanical - 32-QFN Package 16 Part Marking 17 Moisture Sensitivity Level MSL 17 5 Datasheet Control 18 Changes 18 Numbering Convention 18 QT1081_1R0.04_0307

PDF Datasheet Preview

QT1081
8-KEY QTOUCH SENSOR IC

DETECT SYNC/LP VSS SNS7K SNS7 SNS6K SNS6 SNS5K

The QT1081 is an improved, lower cost, simplified circuit version of the popular QT1080 sensor IC. The QT1081 is designed for low cost appliance, mobile, and consumer electronics applications.

QTouch technology is a type of patented charge-transfer sensing method well known for its robust, stable, EMC-resistant characteristics. It is the only all-digital capacitive sensing technology in the market today. This technology has over a decade of applications experience spanning thousands of designs.

QTouch circuits are renowned for simplicity, reliability, ease of design, and cost effectiveness.

QTouch sensors employ a single reference capacitor tied to two pins of the chip for each sensing key a signal trace leads from one of the pins to the sensing electrode which forms the key. The sensing electrode can be a simple solid shape such as a rectangle or circle. An LED can be placed near or inside the solid circle for illumination.

The key electrodes can be designed into a conventional printed circuit board PCB or flexible printed circuit board FPCB as a copper pattern, or as printed conductive ink.

The QT1081 is also compatible with clear films to make simple button-style touch screens over LCD displays.

SS /RST VDD OSC N/C SNS0 SNS0K SNS1
24 23 22 21 20 19 18 17

OUT_0 25
16 SNS5

OUT_1 26
15 SNS4K

OUT_2 27
14 SNS4

OUT_3 28 OUT_4 29

QT1081 32-QFN
13 SNS3K 12 SNS3

OUT_5 30
11 SNS2K

OUT_6 31
10 SNS2

OUT_7 32
9 SN1K
1 2345 6 7 8

AT A GLANCE

Number of keys Technology Key outline sizes Key spacings Electrode design Layers required Substrates Electrode materials Panel materials Adjacent Metal Panel thickness Key sensitivity Outputs Moisture tolerance Power Package Signal processing Applications Patents:
1 to 8 Patented spread-spectrum charge-transfer one-per-key mode 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 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, Orgacon† ink virtually anything electrically conductive Plastic, glass, composites, painted surfaces low particle density metallic paints possible Compatible with grounded metal immediately next to keys Up to 50mm glass, 20mm plastic key size dependent Settable via change in reference capacitor Cs value Parallel discrete output, one-per-key, active-high Good 2.8V ~ 5.0V, <15µA 8 keys at 2.8V, 340ms Low Power mode . 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
†Orgacon is a registered trademark of Agfa-Gevaert N.V

AVAILABLE OPTION
-40oC to +85oC
32-QFN

QT1081-ISG

Copyright 2006-2007 QRG Ltd QT1081_1R0.04_0307

Contents
1 Overview 3 Differences With QT1080 3 Parameters 3 Introduction 3 Burst Operation 3 Self-calibration 3 Autorecalibration 3 Drift Compensation 3 Detection Integrator Confirmation 3 Spread-spectrum Operation 3 Sync Mode 3 Low Power LP Mode 3 Adjacent Key Suppression AKS 3 Outputs 4 Simplified Mode 4 Wiring 5
2 Device Operation 8 Start-up Time 8 Option Resistors 8 One-per-key Output Mode 8 Binary Coded Output Mode 8 DETECT Pin 8 SYNC/LP Pin 8 AKS Function Pins 9 MOD_0, MOD_1 Inputs 9

Fast Detect Mode 9 Simplified Mode 10 Unused Keys 10 3 Design Notes 11 Oscillator Frequency 11 Spread-Spectrum Circuit 11 Cs Sample Capacitors - Sensitivity 11 Power Supply 11 PCB Layout and Construction 11 4 Specifications 12 Absolute Maximum Specifications 12 Recommended Operating Conditions 12 AC Specifications 12 DC Specifications 12 Signal Processing 13 Average Idd Curves 14 LP Mode Typical Response Times 15 Mechanical - 32-QFN Package 16 Part Marking 17 Moisture Sensitivity Level MSL 17 5 Datasheet Control 18 Changes 18 Numbering Convention 18

QT1081_1R0.04_0307

More datasheets: 5082-2811#T50 | 1N5712#T25 | 5082-2835 | 5082-2811 | 5082-2810 | 5082-2835#T50 | 1N5711 | TUF2AAPE | CY25701FJXCT | CY25701FJXC

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived QT1081-ISG Datasheet file may be downloaded here without warranties.

Datasheet ID: QT1081-ISG 519359