E1081 Atmel, E1081 Datasheet

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E1081

Manufacturer Part Number
E1081
Description
KIT EVAL/DEV USING QT1081-ISG
Manufacturer
Atmel
Series
Quantum, QTouch™r
Datasheets
1.QT1081-ISG.pdf (20 pages)
2.AT88SC-SDK1.pdf (90 pages)

Specifications of E1081

Sensor Type
Touch, Capacitive
Sensing Range
9 Buttons/Keys
Voltage - Supply
3V
Embedded
No
Utilized Ic / Part
QT1081
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Interface
-
Sensitivity
-
lQ
This datasheet is applicable to all revision 1 chips
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.
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:
†
LQ
Orgacon is a registered trademark of Agfa-Gevaert N.V
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
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 Suppression
Portable devices, domestic appliances and A/V gear, PC peripherals, office equipment
AKS™ (patented Adjacent Key Suppression)
QTouch™ (patented Charge-transfer method)
-40
o
C to +85
T
AVAILABLE OPTION
A
o
C
†
ink (virtually anything electrically conductive)
QT1081-ISG
32-QFN
8-K
OUT_3
OUT_4
OUT_7
OUT_0
OUT_1
OUT_2
OUT_5
OUT_6
EY
28
31
32
25
26
27
29
30
QT
24
Copyright © 2006-2007 QRG Ltd
1
23
2 3 4 5 6 7
OUCH
22 21 20 19 18 17
QT1081
32-QFN
QT1081_1R0.04_0307
™ S
16 SNS5
15 SNS4K
13 SNS3K
12 SNS3
10 SNS2
8
14 SNS4
11 SNS2K
QT1081
9
ENSOR
SN1K
TM
IC

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E1081 Summary of contents

Page 1

This datasheet is applicable to all revision 1 chips 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™ ...

Page 2

Contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 3

Overview Differences With QT1080 1.1 The QT1081 is a general replacement device for the highly popular QT1080. It has all of the same features as the older device but differs in the following ways: Rs resistors on each channel ...

Page 4

The QT1081 has two different AKS groupings of keys, selectable via option resistors. These groupings are: AKS operates in two groups of four keys. AKS operates over all eight keys. These two modes allow the designer to provide AKS while ...

Page 5

Wiring 32-QFN Name Pin /RST 3 Vdd 4 OSC 5 n/c 6 SNS0 7 SNS0K 8 SNS1 9 SNS1K 10 SNS2 11 SNS2K 12 SNS3 13 SNS3K 14 SNS4 15 SNS4K 16 SNS5 17 SNS5K 18 ...

Page 6

Vunreg Voltage Reg *4.7uF Keep these parts close to the IC MOD_1 Vdd / Vss R KEY 3 POL Vdd / Vss R KEY 4 OUT_D Vdd / Vss KEY 5 SL_0 Vdd / Vss KEY 6 ...

Page 7

Vunreg Voltage Reg *4.7uF *4.7uF Keep these parts close to the IC R SNS3 C KEY 3 R SNS4 C KEY 4 10K R SNS5 C KEY 5 10K R SNS6 KEY 6 10K SMR R SNS7 ...

Page 8

Device Operation 2.1 Start-up Time After a reset or power-up event, the device requires 300ms to initialize, calibrate, and start operating normally. Keys will work properly once all keys have been calibrated after reset. 2.2 Option Resistors The option ...

Page 9

Operation in low power mode is governed by the state of the LP input and whether at least one key has a confirmed touch. If the LP input constant low level, then the QT1081 will remain in ...

Page 10

In many applications desirable to sense touch at high speed. Examples include scrolling ‘slider’ strips or ‘Off’ buttons possible to place the device into a ‘Fast Detect’ mode that usually requires under 10ms to respond. This ...

Page 11

Design Notes 3.1 Oscillator Frequency The QT1081’s internal oscillator runs from an external resistor network connected to the OSC and SS pins, as shown in Figures 1.1 and 1.2, to achieve spread-spectrum operation. If spread-spectrum mode is not required, ...

Page 12

Specifications 4.1 Absolute Maximum Specifications Operating temperature, Ta ...

Page 13

Signal Processing Vdd = 5. recommended 5pF 1nF Description Detection threshold Detection hysteresis Anti-detection threshold Anti-detection recalibration delay Detect Integrator filter, normal mode Detect Integrator filter, ‘fast’ mode Max On-Duration Normal drift compensation ...

Page 14

Average Idd Curves All Idd curves are average values, under the following conditions 5pF circuit. Refer to page 9 for more information about optimization of LP modes. Full speed operation QT1081, average Idd (full ...

Page 15

Low Power operation (non-optimized) QT1081, average Idd (100ms LP operation) 800.0 600.0 400.0 200.0 0 burst length (ms) QT1081, average Idd (340ms LP operation) 200.0 150.0 100.0 50.0 0 burst ...

Page 16

Mechanical - 32-QFN Package PIN 1 Dimensions In Millimeters Symbol Minimum Nominal Maximum A 0.70 A1 0. 0.20 REF D 4.90 D2 3.05 E 4. 0.30 y 0.00 L1 0.00 ...

Page 17

Part Marking QT1081 ©QRG 1 Pin 1 Identification 4.10 Moisture Sensitivity Level (MSL) MSL Rating MSL3 lQ QRG Part No. QRG Revision Code YYWWG run nr. ‘YY’ = Year of manufacture ‘WW’ = Week of manufacture ‘G’ = Green/RoHS ...

Page 18

Datasheet Control 5.1 Changes Changes this issue (datasheet rev 04) Changes throughout to remove 48-SSOP package. Section 5: new. 5.2 Numbering Convention Chip Revision (Where M = Major chip revision, A minor chip revision (N) is defined as a ...

Page 19

NOTES QT1081_1R0.04_0307 ...

Page 20

Tel: +44 (0)23 8056 5600 Fax: +44 (0)23 8045 3939 The specifications set out in this document are subject to change without notice. All products sold and services supplied by QRG are subject to QRG’s Terms and Conditions of ...

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