TSC2046
SBAS265G − OCTOBER 2002 − REVISED JANUARY 2008
Low-Voltage I/O
TOUCH SCREEN CONTROLLER
FEATURES
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DESCRIPTION
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 AND SPI 3-WIRE INTERFACE
AUTO POWER-DOWN
AVAILABLE IN TSSOP-16, QFN-16, AND
VFBGA-48 PACKAGES
APPLICATIONS
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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 applications 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
(reference 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 specified over the –40°C to
+85°C temperature range.
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.
PENIRQ
Pen Detect
+VCC
X+
Temperature
Sensor
X−
SAR
IOVDD
Y+
DOUT
TSC2046
Y−
BUSY
Comparator
6− Channel
MUX
VBAT
CDAC
Serial
Data
In/Out
CS
DCLK
Battery
Monitor
DIN
AUX
VREF
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.
All trademarks are the property of their respective owners.
Copyright 2002−2008, Texas Instruments Incorporated
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.
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