TSC
204
6
®
TSC
204
6
®
TSC2046
TSC
204
6
®
SBAS265C – OCTOBER 2002 – REVISED JULY 2004
Low Voltage I/O
TOUCH SCREEN CONTROLLER
FEATURES
SAME PINOUT AS ADS7846
2.2V TO 5.25V OPERATION
1.5V TO 5.25V DIGITAL I/O
INTERNAL 2.5V REFERENCE
DIRECT BATTERY MEASUREMENT (0V to 6V)
ON-CHIP TEMPERATURE MEASUREMENT
TOUCH-PRESSURE MEASUREMENT
QSPI
TM
AND SPI
TM
3-WIRE INTERFACE
AUTO POWER-DOWN
AVAILABLE IN TSSOP-16, QFN-16, AND
VFBGA-48 PACKAGES
DESCRIPTION
The TSC2046 is a next-generation version to the ADS7846
4-wire touch screen controller which supports a low-voltage
I/O interface from 1.5V to 5.25V. The TSC2046 is 100% pin-
compatible with the existing ADS7846, and will drop into the
same socket. This allows for easy upgrade of current appli-
cations to the new version. The TSC2046 also has an on-
chip 2.5V reference that can be used for the auxiliary input,
battery monitor, and temperature measurement modes. The
reference can also be powered down when not used to
conserve power. The internal reference operates down to
2.7V supply voltage, while monitoring the battery voltage
from 0V to 6V.
The low-power consumption of < 0.75mW typ at 2.7V (refer-
ence off), high-speed (up to 125kHz sample rate), and on-
chip drivers make the TSC2046 an ideal choice for battery-
operated systems such as personal digital assistants (PDAs)
with resistive touch screens, pagers, cellular phones, and
other portable equipment. The TSC2046 is available in
TSSOP-16, QFN-16, and VFBGA-48 packages and is speci-
fied over the –40°C to +85°C temperature range.
APPLICATIONS
PERSONAL DIGITAL ASSISTANTS
PORTABLE INSTRUMENTS
POINT-OF-SALE TERMINALS
PAGERS
TOUCH SCREEN MONITORS
CELLULAR PHONES
US Patent No. 6246394
QSPI and SPI are registered trademarks of Motorola.
Pen
Detect
PENIRQ
+V
CC
X+
X–
Temperature
Sensor
SAR
IOVDD
TSC2046
Y+
Y–
DOUT
BUSY
Comparator
6-Channel
MUX
CDAC
Serial
Data
In/Out
CS
V
BAT
AUX
Battery
Monitor
DCLK
DIN
V
REF
Internal 2.5V
Reference
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 2002-2004, Texas Instruments Incorporated
www.ti.com
BURR-BROWN [ BURR-BROWN CORPORATION ]
