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QT1081 데이터시트 PDF




Quantum에서 제조한 전자 부품 QT1081은 전자 산업 및 응용 분야에서
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부품번호 QT1081 기능
기능 8-KEY QTOUCH SENSOR IC
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QT1081 데이터시트, 핀배열, 회로
lQ
This datasheet is applicable to all revision 1 chips
QT1081
8-KEY QTOUCH™ SENSOR IC
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.
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:
Keywww.DataSheet4U.com 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, Orgaconink (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
LQ
AVAILABLE OPTION
TA
-40oC to +85oC
32-QFN
QT1081-ISG
Copyright © 2006-2007 QRG Ltd
QT1081_1R0.04_0307




QT1081 pdf, 반도체, 판매, 대치품
The QT1081 has two different AKS groupings of keys,
selectable via option resistors. These groupings are:
y AKS operates in two groups of four keys.
y AKS operates over all eight keys.
These two modes allow the designer to provide AKS while
also providing for shift or function operations.
If AKS is disabled, all keys can operate simultaneously.
1.2.11 Outputs
There are two output modes: one-per-key, and binary coded.
One-per-key output: In this mode there is one output pin per
key. This mode has two output drive options, push-pull and
open-drain. The outputs can also be made either active-high
or active-low. These options are set via external configuration
resistors.
Binary coded output: In this mode, three output lines encode
for one possible key in detect. If more than one key is
detecting, only the first one touched will be indicated.
1.2.12 Simplified Mode
To reduce the need for option resistors, the simplified
operating mode places the part into fixed settings with only the
AKS feature being selectable. LP mode is also possible in this
configuration. Simplified mode is suitable for most
applications.
lQ
4
QT1081_1R0.04_0307

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QT1081 전자부품, 판매, 대치품
Figure 1.2 Connection Diagram - Simplified Mode
Vunreg
*4.7uF
+2.8 ~ +5V
Voltage Reg
*4.7uF
VDD
*100nF
* Note: one bypass capacitor to be tightly wired
between Vdd and Vss. Follow manufacturer’s
recommendations for input and output capacitors.
KEY 3
KEY 4
KEY 5
KEY 6
KEY 7
LP IN
DETECT OUT
Keep these parts
close to the IC
1nF 12
RSNS3 CS3 13
10K 1nF
RSNS4 CS4
15
10K 1nF 16
RSNS5
CS5
17
10K
RSNS6
1nF
CS6
18
19
10K
SMR
1M
20
RSNS7 1nF
CS7
10K
21
SNS3
3
VDD
SNS3K
SNS4
SNS4K
SNS5
SNS5K
2
/RST
SNS2K
SNS2
SNS1K
SNS1
SNS0K
SNS0
SNS6
SNS6K
QT1081 OSC
SNS7 32-QFN
SNS7K
SS
Keep these parts
close to the IC
11 1nF RSNS2
10
10K
CS2
RSNS1
9 1nF
8 CS1 10K
7 1nF RSNS0
6
10K
CS0
KEY 2
KEY 1
KEY 0
AKS_0
1M Vdd / Vss
VDD
Recommended Rb1, Rb2 Values
Rb1
4
Rb2
Vdd Range Rb1 Rb2
2.8 ~ 3.59V 12K 22K
3.6 ~ 5V 15K 27K
The required value of spread-spectrum capacitor CSS
will vary according to the lengths of the acquire bursts,
see Section 3.2. A typical value of CSS is 100nF.
CSS
1
22
VSS
23
SYNC/LP
24 DETECT
OUT_7 32
OUT_6 31
OUT_5 30
OUT_4 29
OUT_3 28
OUT_2 27
OUT_1 26
OUT_0 25
OUT_7
OUT_6
OUT_5
OUT_4
OUT_3
OUT_2
OUT_1
OUT_0
Table 1.6
AKS Resistor Options
AKS_0
Vss
Vdd
AKS MODE
Off
On, global
FAST-DETECT
Enabled
Off
Table 1.7
Functions in Simplified Mode
Function
Output Drive, Polarity
SYNC/LP pin
Max on-duration delay
Detect Pin
Parameter
One-per-key outputs, push-pull, active high
180ms nom LP function; sync not available
60 seconds (nom)
Active high on any detect
lQ
7
QT1081_1R0.04_0307

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