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TS20 产品规格书pdf
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TS20 QFN-28 二十通道电容式按键触摸芯片
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SPECIFICATION
VER. 1.9
TS20
20-Ch Auto Sensitivity Calibration Capacitive Touch Sensor
Oct. 2016 ADSemiconductor Confidential
ADSemiconductor
®
TS20 (20-CH Auto Sensitivity Calibration Capacitive Touch Sensor)
AD Semiconductor Confidential 2 / 46
General
The TS20 is 20-Channel capacitive sensor with auto
sensitivity calibration. And the supply voltage range
is from 2.5 to 5.0V.
The TS20 offers LED drivers with 16 steps dimming
controller. The CS1~CS20 ports can be used for
PWM output for LED dimming control.
The TS20 offers a tact switch input. The CS1~CS20
ports can be used for a tact switch input.
The result of touch sensing can be checked by the I
2
C
serial interface.
Block Diagram
Application
Mobile application (mobile phone, PDA, PMP,
MP3, Car navigation)
Membrane switch replacement
Sealed control panels, keypads
Door key-lock matrix application
Touch screen replacement application
Feature
20-Channel capacitive sensor with auto sensitivity
calibration
I2C serial interface
Selectable output operation (single mode / multi-
mode)
Independently adjustable in 16 steps (2 mode)
sensitivity
Adjustable response time by the control registers
Embedded common and normal noise elimination
circuit
Available LED PWM drive ports up to 20 channels
Available tact switch input up to 20 channels
Typical current consumption in slow mode
85 uA (@3.3V)
Clock-off mode to reduce the current consumption
9uA (@3.3V)
RoHS compliant 28QFN and 28TSSOP package
Ordering Information
Part No.
Package
TS20-Q
28QFN
TS20
28TSSOP
ADSemiconductor
®
TS20 (20-CH Auto Sensitivity Calibration Capacitive Touch Sensor)
AD Semiconductor Confidential 4 / 46
Content
GENERAL ................................................................................................................................. 2
REVISION HISTORY............................................................................................................... 3
1 PIN CONFIGURATION ................................................................................................... 6
2 PIN DESCRIPTION .......................................................................................................... 7
2.1 TS20-Q (28QFN PACKAGE) ....................................................................................... 8
2.2 TS20 (28TSSOP PACKAGE) ...................................................................................... 10
3 ABSOLUTE MAXIMUM RATING ............................................................................... 12
4 ESD & LATCH-UP CHARACTERISTICS .................................................................... 12
4.1 ESD CHARACTERISTICS ............................................................................................ 12
4.2 LATCH-UP CHARACTERISTICS ................................................................................... 12
5 ELECTRICAL CHARACTERISTICS ............................................................................ 13
6 TS20 IMPLEMENTATION ............................................................................................ 14
6.1 CS IMPLEMENTATION ................................................................................................ 14
6.2 CS IMPLEMENTATION FOR TACT SWITCH INPUT ........................................................ 15
6.3 CS IMPLEMENTATION FOR LED DRIVE OUTPUT ........................................................ 15
6.4 INTERNAL RESET OPERATION .................................................................................... 16
6.5 POWER ON SEQUENCE FOR SCL & SDA.................................................................... 16
7 I2C INTERFACE............................................................................................................. 17
7.1 I2C ENABLE / DISABLE ............................................................................................. 17
7.2 START & STOP CONDITION ....................................................................................... 17
7.3 DATA VALIDITY ........................................................................................................ 17
7.4 BYTE FORMAT .......................................................................................................... 17
7.5 ACKNOWLEDGE ........................................................................................................ 18
7.6 FIRST BYTE ............................................................................................................... 18
7.6.1 Slave Address....................................................................................................... 18
7.6.2 R/W
─
...................................................................................................................... 18
7.7 TRANSFERRING DATA ............................................................................................... 19
7.7.1 Write Operation ................................................................................................... 19
7.7.2 Read Operation .................................................................................................... 19
7.7.3 Read/Write Operation .......................................................................................... 19
7.8 I2C WRITE AND READ OPERATIONS IN NORMAL MODE .............................................. 20
8 TS20 CONTROL REGISTER LIST ............................................................................... 21
8.1 I2C REGISTER MAP ................................................................................................... 21
8.2 DETAILS .................................................................................................................... 23
8.2.1 Sensitivity Control Register ................................................................................. 23
8.2.2 General Control Register 1 .................................................................................. 24
8.2.3 General Control Register 2 .................................................................................. 25
ADSemiconductor
®
TS20 (20-CH Auto Sensitivity Calibration Capacitive Touch Sensor)
AD Semiconductor Confidential 5 / 46
8.2.4 Calibration Speed Control Register ..................................................................... 26
8.2.5 Ports Control Register .......................................................................................... 28
8.2.6 Channel Calibration Control Register .................................................................. 29
8.2.7 Noise Environment Overcome Control Register ................................................. 30
8.2.8 Output Register .................................................................................................... 30
8.2.9 Write Reference Count Register .......................................................................... 31
8.2.10 Sensitivity Reading Channel Select Register ....................................................... 32
8.2.11 Sensitivity Read Register ..................................................................................... 32
8.2.12 Sense, Reference Count Read Register ................................................................ 34
9 RECOMMENDED TS20 POWER UP SEQUENCE (EXAMPLE) ............................... 36
9.1 RECOMMENDED TS20 POWER UP FLOW CHART ....................................................... 36
9.2 RECOMMENDED TS20 POWER UP SEQUENCE SAMPLE ............................................. 37
10 RECOMMENDED CIRCUIT DIAGRAM ..................................................................... 38
10.1 APPLICATION EXAMPLE IN CLEAN POWER ENVIRONMENT......................................... 38
10.2 APPLICATION EXAMPLE IN NOISY ENVIRONMENT ..................................................... 39
10.3 EXAMPLE – POWER LINE SPLIT STRATEGY PCB LAYOUT ........................................ 40
11 MECHANICAL DRAWING........................................................................................... 41
11.1 MECHANICAL DRAWING OF TS20-Q (28 QFN) ........................................................ 41
11.2 MECHANICAL DRAWING OF TS20 (28 TSSOP) ........................................................ 43
12 MARKING DESCRIPTION ........................................................................................... 45
12.1 MARKING DESCRIPTION OF TS20-Q (28 QFN) ......................................................... 45
12.2 MARKING DESCRIPTION OF TS20 (28 TSSOP) ......................................................... 45
ADSemiconductor
®
TS20 (20-CH Auto Sensitivity Calibration Capacitive Touch Sensor)
AD Semiconductor Confidential 6 / 46
1 Pin Configuration
[28-QFN]
[28-TSSOP]
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