T
S
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T
S
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2
TSC2046
2
0
4
6
0
4
6
T
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S
C
2
0
4
6
SBAS265C – OCTOBER 2002 – REVISED JULY 2004
Low Voltage I/O
TOUCH SCREEN CONTROLLER
FEATURES
DESCRIPTION
z SAME PINOUT AS ADS7846
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.
z 2.2V TO 5.25V OPERATION
z 1.5V TO 5.25V DIGITAL I/O
z INTERNAL 2.5V REFERENCE
z DIRECT BATTERY MEASUREMENT (0V to 6V)
z ON-CHIP TEMPERATURE MEASUREMENT
z TOUCH-PRESSURE MEASUREMENT
z QSPITM AND SPITM 3-WIRE INTERFACE
z AUTO POWER-DOWN
z AVAILABLE IN TSSOP-16, QFN-16, AND
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.
VFBGA-48 PACKAGES
APPLICATIONS
z PERSONAL DIGITAL ASSISTANTS
z PORTABLE INSTRUMENTS
z POINT-OF-SALE TERMINALS
z PAGERS
z TOUCH SCREEN MONITORS
z CELLULAR PHONES
Pen
Detect
PENIRQ
US Patent No. 6246394
QSPI and SPI are registered trademarks of Motorola.
+VCC
X+
X–
Temperature
SAR
Sensor
IOVDD
Y+
Y–
TSC2046
DOUT
BUSY
Comparator
CS
6-Channel
MUX
Serial
Data
CDAC
In/Out
DCLK
DIN
Battery
Monitor
V
BAT
AUX
Internal 2.5V
Reference
VREF
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.
Copyright © 2002-2004, Texas Instruments Incorporated
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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