TSC2046

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


Application

 PERSONAL DIGITAL ASSISTANTS
PORTABLE INSTRUMENTS
POINT-OF-SALE TERMINALS
PAGERS
TOUCH SCREEN MONITORS
CELLULAR PHONES


Pinout




Specifications

+V_CC and IOVDD to GND.....................................................0.3V to +6V
Analog Inputs to GND ............................................0.3V to +VCC + 0.3V
Digital Inputs to GND ..........................................0.3V to IOVDD + 0.3V
Power Dissipation ..........................................................................250mW
Maximum Junction Temperature................................................... +150°C
Operating Temperature Range ....................................... 40°C to +85°C
Storage Temperature Range......................................... 65°C to +150°C
Lead Temperature (soldering, 10s)............................................... +300°C

NOTE: (1) Stresses above these ratings can cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability.


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.