TSC2005_07 Datasheet, PDF (1/44 Pages) Burr-Brown (TI) – 1.6V to 3.6V, 12-Bit, Nanopower, 4-Wire TOUCH SCREEN CONTROLLER with SPI™ Interface

BurrĆBrown Products
from Texas Instruments
TSC2005
SBAS379A – DECEMBER 2006 – REVISED MAY 2007
1.6V to 3.6V, 12-Bit, Nanopower, 4-Wire
TOUCH SCREEN CONTROLLER with SPI™ Interface
FEATURES
• 4-Wire Touch Screen Interface
• Ratiometric Conversion
• Single 1.6V to 3.6V Supply
• Preprocessing to Reduce Bus Activity
• High-Speed SPI-Compatible Interface
• Internal Detection of Screen Touch
• Register-Based Programmable:
– 10-Bit or 12-Bit Resolution
– Sampling Rates
– System Timing
• On-Chip Temperature Measurement
• Touch Pressure Measurement
• Auto Power-Down Control
• Low Power:
– 800µW at 1.8V, 50SSPS
– 600µW at 1.6V, 50SSPS
– 75µW at 1.6V, 8.2kSPS Eq. Rate
• Enhanced ESD Protection:
– ±6kV HBM
– ±1kV CDM
– ±25kV Air Gap Discharge
– ±12kV Contact Discharge
• 2.5 x 3 WCSP-18 Package
U.S. Patent NO. 6246394; other patents pending.
APPLICATIONS
• Personal Digital Assistants
• Cellular Phones
• Portable Instruments
• Point-of-Sale Terminals
• MP3 Players, Pagers
• Multiscreen Touch Control
DESCRIPTION
The TSC2005 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 1.6V, 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 TSC2005
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 TSC2005 supports an SPI-compatible serial bus
up to 25MHz. It offers programmable resolution of 10
or 12 bits to accommodate different screen sizes and
performance needs.
The TSC2005 is available in a miniature 18-lead,
5 x 6 array, 2.608 x 3.108 mm wafer chip-scale
package (WCSP). The device is characterized for the
–40°C to +85°C industrial temperature range.
VREF
X+
Touch
X-
Screen
Y+
Drivers
Y-
Interface
Mux
AUX
TEMP
SAR
ADC
Internal
Clock
PENIRQ
DAV
SPI
Serial
Interface
and
Control
PINTDAV
CS
SCLK
SDI
RESET
SDO
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.
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 © 2006–2007, Texas Instruments Incorporated