ADA03 [ETC]
1-CH CAPACITIVE TOUCH SENSER IC; 1通道电容触摸IC SENSER
| 型号： | ADA03 |
| 厂家： | 
ETC |
| 描述： | 1-CH CAPACITIVE TOUCH SENSER IC |
| 文件： | 总5页 (文件大小：100K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ADA03 Capacitive Touch Sensor with Self-Calibration mode
Dec. 2004
Chemtronics
ADA03
1-CH Capacitive Touch Sensor with Self-Calibration Mode
General Description
General Feature
ꢀ 1-Channel Capacitive Sensor with self calibration.
ꢀ Projects a 'touch button' through any dielectric,
ꢀ Sensitivity selection with a external capacitor.
ꢀ Open-Drain Digital Output.
The ADA03 touch sensor is designed specifically for detecting
of capacitance variation in sense node, and it is detecting 0.1pF
capacitance difference as compared with average capacitance. It
will project a sense field through almost any dielectric material
and detect the capacitance variation in sense node. Its sense
module can be sealed from water or dust perfectly.
Application
ꢀ Fluid level sensing
Also the device works in the very low power condition, supply
voltage, 2.5V and 30uA.
ꢀ Switch replacement
ꢀ Human presence detection
ꢀ Human interface for Toys & interactive games
ꢀ Switch for light controls.
ꢀ Membrane switch replacement
ꢀ Sealed control panels, keypads
Package (SOT26)
Output
VDD
C_DEG
GND
R_bias
Input_cs
PIN Description
Pin name
Output
Vdd
R_bias
Input_Cs
Gnd
Function
Protection
Vdd
Output of Open Drain
Supply Voltage( 2.5V – 5.5V)
Set a Bias Current
Sensor Capacitance input
Ground
Vdd
Vdd
C_deg
Sensitivity level selection( 5 level)
Vdd
1
© 2004 chem tronics
Lead Free !
ADA03 Capacitive Touch Sensor with Self-Calibration
͵ΖΔ͑͟ ͣͥ͑͑͡͡
Absolute Maximum Rating
Battery supply voltage
6.5V
Maximum voltage on any pin
Maximum current on any PAD to avoid latch-up
Power Dissipation
VDD+0.3
100mA
100mW
-50 ~ 150ଇ
-20 ~ 75ଇ
150ଇ
Storage Temperature
Operating Temperature
Junction Temperature
ESD protection
2000V
Characteristics
Symbol
Test Condition
Min
Typ
Max
Units
Supply Voltage
Vdd
2.2
-
6.5
V
Current consumption
Power dissipation
Idmax
Pd
-20ଇ < Ta < +75ଇ, Vdd = 5V
-20 ~ 75ଇ, Vdd = 5V
-
-
120
-
uA
200
mW
Electrical Characteristics
TA = 25ଇ
Characteristics
Symbol
Condition
Min
Typ
Max
Units
V
Operating Voltage
Vdd
2.5
5.5
VDD=5.0V, Rb=500K
VDD=2.5V, Rb=500K
delta Cs > 0.1pF
100
40
uA
Current consumption
Idd
uA
Output Impedance
( open drain )
10
Zo
Isk
Cs
Ohm
mA
pF
delta Cs < 0.1pF
100M
Output Sink Current
VDD=5V, Rb=500K
4.0
Input capacitance range
1.0
4.0
Minimum detective
capacitance
delta_Cs
T_hold
T_cal
Cs = 4pF
0.1
60
pF
sec
sec
Output hold time
delta Cs > 0.1pF, Rb=500K
power on reset, VDD=5.0V,
Rb=300K
Self calibration time
0.25
Rb
VDD=5.0V
300
200
500
300
650
450
Kohm
Kohm
Bias resistance
Note1
VDD=2.5V
Vdd=2.5V
0
Vdd=3.3V
0
Vdd=5.0V
0
Sensitivity
Selection
Very High Sensitivity
High Sensitivity
pF
pF
pF
pF
Cdeg
220
200
180
Note2
Medium Sensitivity
Low Sensitivity
440
400
360
880
800
750
Note1 : Lower Rb is recommended in noisy condition.
Note2 : Cdeg should be in +/- 5% tolerance.
2
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ADA03 Capacitive Touch Sensor with Self-Calibration
͵ΖΔ͑͟ ͣͥ͑͑͡͡
Application Circuit
Cdeg
OUTPUT
VDD
Output
C_DEG
GND
Rpull_up
VDD
Cx
Cs
Rb
Cb
R_bias
Input_cs
Touch Pad
(7x7mm)
Note1 : For stable operation, Cb should be selected 1.2nF.
Note2 : Cx will help to set a grade of sensitivity for fine tuned level if Cdeg level selected is not enough.
Note3 : If Supply Voltage is not stable, the chip will not operate properly.
Supply Current vs Bias Resistance
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3
©G YWW[Gj
Lead Free !
ADA03 Capacitive Touch Sensor with Self-Calibration
͵ΖΔ͑͟ ͣͥ͑͑͡͡
Package Physical Dimensions millimeters unless otherwise noted
SOT-26(2.9 x 1.6 x 1.1mm)
Recommended Soldering Profiles
Wave Soldering
Wave Solder
4 C/sec
255 C
Ramp Up ( C/sec )
Solder Temperature
Dwell Time
Recommended
Maximum
Maximum
3 seconds
4 C/sec
Ramp Down
Recommended
IR Convection / Vapor Phase Reflow – Surface Mount
Convection / IR
2 C/sec
235 C
Vapor Phase
2 C/sec
Ramp Up ( C/sec )
Solder Temperature
Dwell Time
Recommended
Maximum
Maximum
230 C
60 seconds
2 C/sec
15 seconds
2 C/sec
Ramp Down
Recommended
4
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Lead Free !
ADA03 Capacitive Touch Sensor with Self-Calibration
͵ΖΔ͑͟ ͣͥ͑͑͡͡
MARKING SPECIFICATION
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LIFE SUPPORT POLICY
CHEMTRONICS PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF
CHEMTRONICS CORPORATION.
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