TSC2007_17 Datasheet, PDF (1/41 Pages) Texas Instruments – 1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire Micro TOUCH SCREEN CONTROLLER with I2C Interface

TSC2007 ®
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 I²C™ Interface
FEATURES
1
•23 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
• I²C 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
U.S. Patent NO. 6246394; other patents pending.
APPLICATIONS
• Cellular Phones
• PDA, GPS, and Media Players
• Portable Instruments
• Point-of-Sale Terminals
• Multiscreen Touch Control Systems
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 I²C 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.
X+
X-
Y+
Y-
AUX
Touch
Screen
Drivers
Interface
TEMP
VDD/REF
Mux
SAR
ADC
Internal
Clock
GND
I²C
Serial
Interface
and
Control
PENIRQ
SCL
SDA
A[0:1]
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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.
I2C is a trademark of NXP Semiconductors.
2
All other trademarks are the property of their respective owners.
3
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 © 2007–2009, Texas Instruments Incorporated