TSC2000
T
S
®
C
2
0
0
0
SBAS257 – FEBRUARY 2002
PDA ANALOG INTERFACE CIRCUIT
FEATURES
APPLICATIONS
● PERSONAL DIGITAL ASSISTANTS
● 4-WIRE TOUCH SCREEN INTERFACE
● RATIOMETRIC CONVERSION
● SINGLE 2.7V TO 3.6V SUPPLY
● SERIAL INTERFACE
● CELLULAR PHONES
● MP3 PLAYERS
DESCRIPTION
● INTERNAL DETECTION OF SCREEN TOUCH
The TSC2000 is a complete PDA analog interface circuit. It
contains a complete 12-bit, Analog-to-Digital (A/D) resistive
touch screen converter including drivers, the control to mea-
sure touch pressure, and an 8-bit Digital-to-Analog (D/A)
converter output for LCD contrast control. The TSC2000
interfaces to the host controller through a standard SPI™
serial interface. The TSC2000 offers programmable resolution
and sampling rates from 8- to 12-bits and up to 125kHz to
accommodate different screen sizes.
● PROGRAMMABLE 8-, 10-, OR 12-BIT
RESOLUTION
● PROGRAMMABLE SAMPLING RATES
● DIRECT BATTERY MEASUREMENT (0.5V to 6V)
● ON-CHIP TEMPERATURE MEASUREMENT
● TOUCH-PRESSURE MEASUREMENT
● FULL POWER-DOWN CONTROL
● TSSOP-20 PACKAGE
The TSC2000 also offers two battery-measurement inputs,
one of which is capable of reading battery voltages up to 6V
while operating at only 2.7V. It also has an on-chip temperature
sensor capable of reading 0.3°C resolution. The TSC2000 is
available in a TSSOP-20 package.
SPI is a registered trademark of Motorola.
US Patent No. 624639.
MISO
SS
X+
Clock
X–
Y+
Y–
Touch Panel
Drivers
SCLK
MOSI
Serial
Interface
and
Control
Logic
Temp Sensor
A/D Converter
DAV
MUX
VBAT1
Battery Monitor
Battery Monitor
PENIRQ
VBAT2
AUX1
AUX2
Internal 2.5V
Reference
VREF
ARNG
AOUT
D/A Converter
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, 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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