TSC2046EIPWR
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
QSPITM AND SPITM 3-WIRE INTERFACE
AUTO POWER-DOWN
AVAILABLE IN TSSOP-16, QFN-16, AND
VFBGA-48 PACKAGES
APPLICATIONS
PERSONAL DIGITAL ASSISTANTS
PORTABLE INSTRUMENTS
POINT-OF-SALE TERMINALS
PAGERS
TOUCH SCREEN MONITORS
CELLULAR PHONES
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% pincompatible 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 onchip 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 onchip drivers make the TSC2046 an ideal choice for batteryoperated 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
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