Burr Brown Products
from Texas Instruments
TS
C2
®
007
TSC2007
SBAS405 – MARCH 2007
1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire
Micro TOUCH SCREEN CONTROLLER with I
2
C™ Interface
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 Pullup
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
•
•
•
•
•
Cellular Phones
PDA, GPS, and Media Players
Portable Instruments
Point-of-Sale Terminals
Multiscreen Touch Control
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.
VDD/REF
PENIRQ
•
•
•
•
•
•
•
•
U.S. Patent NO. 6246394; other patents pending.
Preprocessing
X+
X-
Y+
Y-
Touch
Screen
Drivers
Interface
TEMP
Mux
SAR
ADC
AUX
Internal
Clock
I
2
C
Serial
Interface
and
Control
SCL
SDA
A[0:1]
GND
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.
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.
Copyright © 2007, Texas Instruments Incorporated
TSC2007
www.ti.com
SBAS405 – MARCH 2007
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
TSC2007I
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)
TSC2007
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
(1)
Vapor phase (60 sec)
Infrared (15 sec)
WCSP package
Low-K
High-K
Analog input X+, Y+, AUX to GND
Analog input X–, Y– to GND
VDD to GND
–0.4 to VDD + 0.1
–0.4 to VDD + 0.1
–0.3 to +5
–0.3 to VDD + 0.3
–0.3 to VDD + 0.3
(T
J
Max - T
A
)/θ
JA
86
113
62
–40 to +85
–65 to +150
+150
+215
+220
°C
°C
°C
°C
°C
°C/W
UNIT
V
V
V
V
V
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.
2
Submit Documentation Feedback
TSC2007
www.ti.com
SBAS405 – MARCH 2007
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–
51
90
6
5
kΩ
kΩ
Ω
Ω
50
mA
°C
°C/LSB
°C/LSB
°C/LSB
°C/LSB
°C/LSB
°C/LSB
°C/LSB
°C/LSB
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
%/°C
%/°C
Switch drivers drive current
(2)
INTERNAL TEMPERATURE SENSOR
Temperature range
100ms duration
–40
Differential
method
(3)
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
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
1.94
1.04
0.35
0.19
±2
±2
±3
±3
3.19
3.66
3.78
3.82
1.6
1.83
1.88
1.91
0.0056
0.012
+85
Resolution
TEMP1
(4)
,
Differential
method
(3)
Accuracy
TEMP1
(4)
INTERNAL OSCILLATOR
Internal clock frequency, f
CCLK
Frequency drift
V
DD
= 1.6V
V
DD
= 3.0V
(1)
(2)
(3)
(4)
LSB means Least Significant Bit. With V
DD
(REF) = +1.6V, one LSB is 391µV.
Assured 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.
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