TSC2008
www.ti.com .................................................................................................................................................. SBAS406A–JUNE 2008–REVISED DECEMBER 2008
1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire
Micro TOUCH SCREEN CONTROLLER with SPI™
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FEATURES
APPLICATIONS
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Cellular Phones
PDA, GPS, and Media Players
Portable Instruments
Point-of-Sale Terminals
Multi-Screen Touch Control Systems
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4-Wire Touch Screen Interface
Single 1.2V to 3.6V Supply/Reference
Ratiometric Conversion
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Effective Throughput Rate:
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Up to 20kHz (8-Bit) or 10kHz (12-Bit)
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Preprocessing to Reduce Bus Activity
High-Speed SPI (up to 25MHz)
DESCRIPTION
The TSC2008 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
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.
Simple Command-Based User Interface:
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TSC2046 Compatible
8- or 12-Bit Resolution
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On-Chip Temperature Measurement
Touch Pressure Measurement
Digital Buffered PENIRQ
On-Chip, Programmable PENIRQ Pull-up
Auto Power-Down Control
In addition to these standard features, the TSC2008
offers
preprocessing
of
the
touch
screen
Low Power (12-Bit, 8.2kHz Eq Rate):
measurements to reduce bus loading, thus reducing
the consumption of host processor resources that can
then be redirected to more critical functions.
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30.4µA at 1.2V, fSCLK = 5MHz
35.5µA at 1.8V, fSCLK = 10MHz
44.6µA at 2.7V, fSCLK = 10MHz
The TSC2008 supports an SPI serial bus and data
transmission. It offers programmable resolution of 8
or 12 bits to accommodate different screen sizes and
performance needs.
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Power-On, Software, and SureSet™ Resets
Enhanced ESD Protection:
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±8kV HBM
The TSC2008 is available in
a
12-lead,
±1kV CDM
(1,555 ±0,055mm) x (2,055 ±0,055mm) 3 x 4 array,
wafer chip-scale package (WCSP), and a 16-pin,
4 x 4 QFN(1) package. The TSC2008 is characterized
for the –40°C to +85°C industrial temperature range.
±25kV Air Gap Discharge
±15kV Contact Discharge
1.5 x 2 WCSP-12 and 4 x 4 QFN-16(1) Packages
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(1)
RGV (QFN) package available Q1, 2009.
U.S. Patent No. 6246394; other patents pending.
VDD/REF
PENIRQ
X+
Touch
X-
Y+
Y-
Screen
Sensor
Drivers
SPI
Serial
Interface
and
Control
SAR
ADC
CS
Mux
SCLK
TEMP
SDI
AUX
SDO
Internal
Clock
GND
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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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SureSet is a trademark of Texas Instruments.
SPI is a trademark of Motorola Inc.
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 © 2008, Texas Instruments Incorporated