TS
C2
®
007
TSC2007
www.ti.com......................................................................................................................................................
SBAS405A – MARCH 2007 – REVISED MARCH 2009
1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire
Micro TOUCH SCREEN CONTROLLER with I
2
C™ Interface
1
FEATURES
4-Wire Touch Screen Interface
Single 1.2V to 3.6V Supply/Reference
Ratiometric Conversion
Effective Throughput Rate:
– Up to 20kHz (8-Bit) or 10kHz (12-Bit)
Preprocessing to Reduce Bus Activity
I
2
C Interface Supports:
– Standard, Fast, and High-Speed Modes
Simple, Command-Based User Interface:
–
TSC2003
Compatible
– 8- or 12-Bit Resolution
On-Chip Temperature Measurement
Touch Pressure Measurement
Digital Buffered PENIRQ
On-Chip, Programmable PENIRQ Pull-Up
Auto Power-Down Control
Low Power:
– 32.24µA at 1.2V, Fast Mode, 8.2kHz Eq Rate
– 39.31µA at 1.8V, Fast Mode, 8.2kHz Eq Rate
– 53.32µA at 2.7V, Fast Mode, 8.2kHz Eq Rate
Enhanced ESD Protection:
– ±8kV HBM
– ±1kV CDM
– ±25kV Air Gap Discharge
– ±15kV Contact Discharge
1.5 x 2 WCSP-12 and 5 x 6.4 TSSOP-16
Packages
APPLICATIONS
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•
•
Cellular Phones
PDA, GPS, and Media Players
Portable Instruments
Point-of-Sale Terminals
Multiscreen Touch Control Systems
•
•
•
•
23
•
•
•
DESCRIPTION
The TSC2007 is a very low-power touch screen
controller designed to work with power-sensitive,
handheld applications that are based on an advanced
low-voltage processor. It works with a supply voltage
as low as 1.2V, which can be supplied by a
single-cell battery. It contains a complete, ultra-low
power, 12-bit, analog-to-digital (A/D) resistive touch
screen converter, including drivers and the control
logic to measure touch pressure.
In addition to these standard features, the TSC2007
offers
preprocessing
of
the
touch
screen
measurements to reduce bus loading, thus reducing
the consumption of host processor resources that can
then be redirected to more critical functions.
The TSC2007 supports an I
2
C serial bus and data
transmission protocol in all three defined modes:
standard,
fast,
and
high-speed.
It
offers
programmable resolution of 8 or 12 bits to
accommodate different screen sizes and performance
needs.
The TSC2007 is available in a 12-lead,
(1.555 ±0.055mm) x (2.055 ±0.055mm), 3 x 4 array,
wafer chip-scale package (WCSP), and a 16-pin,
TSSOP package. The TSC2007 is characterized for
the –40°C to +85°C industrial temperature range.
•
•
•
•
•
•
•
•
U.S. Patent NO. 6246394; other patents pending.
VDD/REF
PENIRQ
X+
X-
Y+
Y-
Touch
Screen
Drivers
Interface
TEMP
AUX
Internal
Clock
Preprocessing
Mux
SAR
ADC
I
2
C
Serial
Interface
and
Control
SCL
SDA
A[0:1]
GND
1
2
3
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
I2C is a trademark of NXP Semiconductors.
All other trademarks are the property of their respective owners.
Copyright © 2007–2009, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
TSC2007
SBAS405A – MARCH 2007 – REVISED MARCH 2009......................................................................................................................................................
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
ORDERING INFORMATION
(1)
TYPICAL
INTEGRAL
LINEARITY
(LSB)
TYPICAL
GAIN
ERROR
(LSB)
NO MISSING
CODES
RESOLUTION
(BITS)
PACKAGE
TYPE
16-Pin,
5 x 6.4
TSSOP
TSC2007I
±1.5
0.1
11
12-Pin,
3 x 4 Matrix,
1.5 x 2
WCSP
PACKAGE
DESIGNATOR
PW
SPECIFIED
TEMPERATURE
RANGE
–40°C to +85°C
PACKAGE
MARKING
TSC2007
ORDERING
NUMBER
TSC2007IPW
TSC2007IPWR
TSC2007IYZGT
YZG
–40°C to +85°C
TSC2007I
TSC2007IYZGR
TRANSPORT
MEDIA,
QUANTITY
Tube, 90
Tape and
Reel, 2000
Small Tape
and Reel, 250
Tape and
Reel, 3000
PRODUCT
(1)
For the most current package and ordering information, see the Package Option Addendum located at the end of this data sheet, or see
the TI website at
www.ti.com.
ABSOLUTE MAXIMUM RATINGS
(1)
Over operating free-air temperature range (unless otherwise noted).
PRAMETER
Voltage
Voltage range
Digital input voltage to GND
Digital output voltage to GND
Power dissipation
TSSOP package
Thermal impedance,
θ
JA
Operating free-air temperature range, T
A
Storage temperature range, T
STG
Junction temperature, T
J
Max
Lead temperature
IEC contact discharge
(2)
IEC air discharge
(1)
(2)
(2)
TSC2007
Analog input X+, Y+, AUX to GND
Analog input X–, Y– to GND
VDD/REF pin to GND
–0.4 to V
DD
+ 0.1
–0.4 to V
DD
+ 0.1
–0.3 to +5
–0.3 to V
DD
+ 0.3
–0.3 to V
DD
+ 0.3
(T
J
Max - T
A
)/θ
JA
86
Low-K
High-K
113
62
–40 to +85
–65 to +150
+150
Vapor phase (60 sec)
Infrared (15 sec)
X+, X–, Y+, Y–
X+, X–, Y+, Y–
+215
+220
±15
±25
UNIT
V
V
V
V
V
WCSP package
°C/W
°C
°C
°C
°C
°C
kV
kV
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated is not implied. Exposure to
absolute-maximum rated conditions for extended periods may affect device reliability.
Test method based on IEC standard 61000-4-2. Contact Texas Instruments for test details.
2
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Product Folder Link(s):
TSC2007
Copyright © 2007–2009, Texas Instruments Incorporated
TSC2007
www.ti.com......................................................................................................................................................
SBAS405A – MARCH 2007 – REVISED MARCH 2009
ELECTRICAL CHARACTERISTICS
At T
A
= –40°C to +85°C, V
DD
= +1.2V to +3.6V, unless otherwise noted.
TSC2007
PARAMETER
AUXILIARY ANALOG INPUT
Input voltage range
Input capacitance
Input leakage current
A/D CONVERTER
Resolution
No missing codes
Integral linearity
Offset error
V
DD
= 1.8V
V
DD
= 3.0V
V
DD
= 1.8V
V
DD
= 3.0V
T
A
= +25°C, V
DD
= 1.8V, command '1011' set '0000'
T
A
= +25°C, V
DD
= 1.8V, command '1011' set '0001'
Programmable: 8 or 12 bits
12-bit resolution
11
±1.5
–1.2
–3.1
0.7
0.1
12
Bits
Bits
LSB
(1)
LSB
LSB
LSB
LSB
–1
0
12
+1
V
DD
V
pF
µA
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Gain error
TOUCH SENSORS
PENIRQ pull-up resistor, R
IRQ
Switch
on-resistance
Y+, X+
Y–, X–
(2)
51
90
6
5
kΩ
kΩ
Ω
Ω
50
mA
Switch drivers drive current
100ms duration
INTERNAL TEMPERATURE SENSOR
Temperature range
Differential
method
(3)
Resolution
TEMP1
(4)
Differential
method
(3)
Accuracy
TEMP1
(4)
INTERNAL OSCILLATOR
V
DD
= 1.2V
8-Bit
V
DD
= 1.8V
V
DD
= 2.7V
V
DD
= 3.6V
V
DD
= 1.2V
12-Bit
V
DD
= 1.8V
V
DD
= 2.7V
V
DD
= 3.6V
Frequency drift
V
DD
= 1.6V
V
DD
= 3.0V
3.19
3.66
3.78
3.82
1.6
1.83
1.88
1.91
0.0056
0.012
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
%/°C
%/°C
V
DD
= 3V
V
DD
= 1.6V
V
DD
= 3V
V
DD
= 1.6V
V
DD
= 3V
V
DD
= 1.6V
V
DD
= 3V
V
DD
= 1.6V
–40
1.94
1.04
0.35
0.19
±2
±2
±3
±3
+85
°C
°C/LSB
°C/LSB
°C/LSB
°C/LSB
°C/LSB
°C/LSB
°C/LSB
°C/LSB
Internal clock frequency, f
CCLK
(1)
(2)
(3)
(4)
LSB means Least Significant Bit. With VDD/REF pin = +1.6V, one LSB is 391µV.
Specified by design, but not tested. Exceeding 50mA source current may result in device degradation.
Difference between TEMP1 and TEMP2 measurement; no calibration necessary.
Temperature drift is –2.1mV/°C.
Copyright © 2007–2009, Texas Instruments Incorporated
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Product Folder Link(s):
TSC2007
3
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