TSC2004_12 Datasheet, PDF (1/58 Pages) Burr-Brown (TI) – 1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire

BurrĆBrown Products
TSC2004 ®
from Texas Instruments
TSC2004
SBAS408E – JUNE 2007 – REVISED MARCH 2008
1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire
TOUCH SCREEN CONTROLLER with I²C™ Interface
FEATURES
1
•23 4-Wire Touch Screen Interface
• 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:
– 10-Bit or 12-Bit Resolution
– Sampling Rates
– System Timing
• On-Chip Temperature Measurement
• Touch Pressure Measurement
• Auto Power-Down Control
• Low Power:
– 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
• Enhanced ESD Protection:
– ±8kV HBM
– ±1kV CDM
– ±25kV Air Gap Discharge
– ±12kV Contact Discharge
• 2.5 x 2.5 WCSP-18 and 4 x 4 QFN-20 Packages
U.S. Patent No. 6,246,394; other patents pending.
APPLICATIONS
• Cellular Phones
• Portable Instruments
• MP3 Players, Pagers
• Multiscreen Touch Control
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
single-cell battery. It contains a complete,
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
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:
standard, fast, and high-speed. It offers
programmable resolution of 10 or 12 bits to
accommodate different screen sizes and performance
needs.
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.
VREF
X+
X-
Y+
Y-
AUX
Touch
Screen
Drivers
Interface
TEMP
Mux
SAR
ADC
Internal
Clock
PENIRQ
DAV
I²C
Serial
Interface
and
Control
PINTDAV
SCL
SDA
AD0
AD1
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.
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 © 2007–2008, Texas Instruments Incorporated