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TSC2004
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SBAS408E–JUNE 2007–REVISED MARCH 2008
1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire
TOUCH SCREEN CONTROLLER with I2C™ Interface
1
FEATURES
APPLICATIONS
•
•
•
•
Cellular Phones
23
•
4-Wire Touch Screen Interface
Portable Instruments
MP3 Players, Pagers
Multiscreen Touch Control
•
•
•
•
•
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Ratiometric Conversion
Single 1.2V to 3.6V Supply
Preprocessing to Reduce Bus Activity
High-Speed I2C-Compatible Interface
Internal Detection of Screen Touch
Register-Based Programmable:
DESCRIPTION
The TSC2004 is a very low-power touch screen
controller designed to work with power-sensitive,
handheld applications that are based on advanced
low-voltage processors. It works with a supply voltage
as low as 1.2V, which can be supplied by a
–
–
–
10-Bit or 12-Bit Resolution
Sampling Rates
System Timing
single-cell battery. It contains
a
complete,
•
•
•
•
On-Chip Temperature Measurement
Touch Pressure Measurement
Auto Power-Down Control
Low Power:
ultralow-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 TSC2004
offers
preprocessing
of
the
touch
screen
–
–
–
–
–
760µW at 1.8V, 50SSPS
measurements to reduce bus loading, thus reducing
the consumption of host processor resources that can
then be redirected to more critical functions.
The TSC2004 supports an I2C serial bus and data
transmission protocol in all three defined modes:
580µW at 1.6V, 50SSPS
285µW at 1.2V, 50SSPS
74µW at 1.6V, 8.2kSPS Eq. Rate
47µW at 1.2V, 8.2kSPS Eq. Rate
standard,
fast,
and
high-speed.
It
offers
•
•
Enhanced ESD Protection:
programmable resolution of 10 or 12 bits to
accommodate different screen sizes and performance
needs.
–
–
–
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±8kV HBM
±1kV CDM
±25kV Air Gap Discharge
±12kV Contact Discharge
The TSC2004 is available in a miniature, 18-lead,
5 x 5 array, (2.554 ±0.54)mm x (2.554 ±0.54)mm
wafer chip-scale package (WCSP), and a 20-pin, 4 x
4 QFN package. Both packages are characterized for
the –40°C to +85°C industrial temperature range.
2.5 x 2.5 WCSP-18 and 4 x 4 QFN-20 Packages
U.S. Patent No. 6,246,394; other patents pending.
PENIRQ
PINTDAV
DAV
VREF
X+
Touch
SCL
X-
Y+
Y-
Screen
Drivers
2
I C
SAR
ADC
SDA
Interface
Mux
Serial
Interface
AD0
and
TEMP
AD1
Control
AUX
Internal
Clock
RESET
1
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.
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3
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 © 2007–2008, Texas Instruments Incorporated