TS02K
2-Channel Self Calibration Capacitive Touch Sensor
SPECIFICATION V1.3
August 2008
ADSemiconductor Confidential
ADSemiconductor
®
TS02K (2-CH Sensitivity Calibration Capacitive Touch Sensor)
1 Specification
1.1 General Feature
2-Channel capacitive touch sensor with self sensitivity calibration
Low power consumption
Uniformly adjustable sensitivity
Sync function for parallel operation
9 steps sensitivity available without external component
Open-drain digital output
Embedded noise elimination circuit
Embedded Internal power reset circuit
RoHS compliant 8SOP package
1.2 Application
Home appliance
Membrane switch replacement
Human interface for toys & interactive games
Sealed control panels, keypads
1.3 Package (8 SOP)
1.SYNC1
8.OUT1
2.SYNC2
7.OUT2
3.GND
6.VDD
4.CS1
5.CS2
TS02K 8SOP (Drawings not to scale)
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ADSemiconductor
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TS02K (2-CH Sensitivity Calibration Capacitive Touch Sensor)
2 Pin Description (8 SOP)
PIN Number
1
2
3
4
5
6
7
8
Name
SYNC1
SYNC2
GND
CS1
CS2
VDD
OUT2
OUT1
I/O
Digital Input
/Output
Digital Input
/Output
Ground
Analog Input
Analog Input
Power
Digital Output
Digital Output
Description
Sensitivity selection input 1 (
Note 1
)
Sync pulse input /output 1
Sensitivity selection input 2 (
Note 1
)
Sync pulse input /output 2
Supply ground
Sense channel 1
Sense channel 2
Power (2.5V ~ 5.0V)
Ch2 touch detect output
Open drain output (Active Low)
Ch1 touch detect output
Open drain output (Active Low)
Protection
VDD/GND
VDD/GND
VDD
VDD/GND
VDD/GND
GND
VDD/GND
VDD/GND
3 Absolute Maximum Rating
Supply voltage
5.5 V
Maximum voltage on any pin
VDD+0.3 V
Maximum current on any PAD
100mA
Continuous power Dissipation
800mW
Storage Temperature
-50 ~ 150℃
Operating Temperature
-20 ~ 75℃
Junction Temperature
150℃
Note Unless otherwise noted, all above are operated in normal temperature
4 ESD & Latch-up Characteristics
4.1
ESD Characteristics
Mode
H.B.M
Polarity
Pos / Neg
Max
7000V
7000V
8000V
400V
600V
600V
800V
Reference
VDD
VSS
P to P
VDD
VSS
P to P
DIRECT
M.M
C.D.M
4.2
Pos / Neg
Pos / Neg
Latch-up Characteristics
Mode
I Test
Polarity
Positive
Negative
Positive
Max
100mA
-100mA
8.0V
Test Step
25mA
1.0V
V supply over 5.0V
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ADSemiconductor
®
TS02K (2-CH Sensitivity Calibration Capacitive Touch Sensor)
5 Electrical Characteristics
▪
V
DD
=3.3V, (Unless otherwise noted), T
A
= 25℃
Characteristics
Operating supply voltage
Current consumption
Output maximum sink
current
Sense input
capacitance range
Note1
Symbol
V
DD
I
DD
I
OUT
C
S1
C
S2
R
S
ΔC
Zo
Test Condition
Min
2.5
Typ
3.3
50
80
-
10
200
-
12
30M
100
80
820
38
Max
5.0
75
Units
V
㎂
V
DD
= 3.3V
V
DD
= 5.0V
T
A
= 25℃
-
-
-
-
-
120
4.0
100
1000
-
-
Ω
-
-
ms
-
1000
pF
sec.
㎃
㎊
Ω
㎊
Sense input
resistance range
Minimum detectable
capacitance difference
Output impedance
(open drain)
Self calibration time
after power on
Maximum bias
capacitance
Expire Time
[
Note 2]
C
S
= 10pF
ΔC > 0.2pF
ΔC < 0.2pF
0.2
-
-
-
-
-
T
CAL
C
B_MAX
E
T
V
DD
= 3.3V
V
DD
= 5.0V
V
DD
=3.3V
Note 1: The sensitivity can be increased with lower C
S
value.
The recommended value of C
S
is 10pF when using 3T PC(Poly Carbonate) cover and
10 ㎜ x 7 ㎜ touch pattern.
Note 2: Expire Time is the maximum time of touch duration.
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TS02K (2-CH Sensitivity Calibration Capacitive Touch Sensor)
6 Implementation of TS02K
6.1 Typical current consumption
TS02K uses internal bias circuit, so internal clock frequency and current consumption is fixed
and no external bias circuit is needed. The typical current consumption curve of TS02K is
represented in accordance with V
DD
voltage as below.
Typical current consumption curve of TS02K
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