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TSC2004
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SBAS408A–JUNE 2007–REVISED AUGUST 2007
1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire
TOUCH SCREEN CONTROLLER with I2C™ Interface
FEATURES
APPLICATIONS
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Cellular Phones
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4-Wire Touch Screen Interface
Portable Instruments
MP3 Players, Pagers
Multiscreen Touch Control
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 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.
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10-Bit or 12-Bit Resolution
Sampling Rates
System Timing
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On-Chip Temperature Measurement
Touch Pressure Measurement
Auto Power-Down Control
Low Power:
In addition to these standard features, the TSC2004
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 TSC2004 supports an I2C serial bus and data
transmission protocol in all three defined modes:
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760μW at 1.8V, 50SSPS
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
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Enhanced ESD Protection:
standard,
programmable resolution of 10 or 12 bits to
accommodate different screen sizes and
performance needs.
fast,
and
high-speed.
It
offers
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±6kV HBM
±1kV CDM
Target ±18kV Air Gap Discharge
Target ±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. 6246394; 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
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.
Copyright © 2007, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.