TSC2200
SBAS191F – FEBRUARY 2001 – REVISED APRIL 2004
PDA ANALOG INTERFACE CIRCUIT
FEATURES
ꢀ 4-WIRE TOUCH SCREEN INTERFACE AND
APPLICATIONS
ꢀ PERSONAL DIGITAL ASSISTANTS
ꢀ CELLULAR PHONES
ꢀ MP3 PLAYERS
4-BY-4 KEYPAD INTERFACE
ꢀ RATIOMETRIC CONVERSION
ꢀ SINGLE 2.7V TO 3.6V SUPPLY
ꢀ SERIAL INTERFACE
DESCRIPTION
ꢀ INTERNAL DETECTION OF SCREEN TOUCH
The TSC2200 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, keyboard controller, and an 8-bit Digital-
to-Analog (D/A) converter output for LCD contrast control.
The TSC2200 interfaces to the host controller through a
standard SPI™ serial interface. The TSC2200 offers program-
mable resolution and sampling rates from 8- to 12-bits and up
to 125kHz to accommodate different screen sizes.
AND KEYPAD
ꢀ 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
The TSC2200 also offers two battery-measurement inputs
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 TSC2200 is available
in a TSSOP-28 and a QFN-32 package.
ꢀ TSSOP-28 AND QFN-32 PACKAGES
SPI is a registered trademark of Motorola.
US Patent No. 624639.
C1 C2 C3 C4 R1 R2 R3 R4
Keyboard Scanner
and State Control
MISO
SS
SCLK
X+
Clock
X–
Y+
Y–
Touch Panel
Drivers
Serial
Interface
and
MOSI
Control
Logic
Temp Sensor
DAV
A/D Converter
PENIRQ
KBIRQ
MUX
VBAT1
Battery Monitor
Battery Monitor
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 © 2001-2004, 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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