TSC2200 Datasheet, PDF (1/40 Pages) Burr-Brown (TI) – PDA ANALOG INTERFACE CIRCUIT

TSC2200
TSC2200
TSC2200
SBAS191F – FEBRUARY 2001 – REVISED APRIL 2004
PDA ANALOG INTERFACE CIRCUIT
FEATURES
q 4-WIRE TOUCH SCREEN INTERFACE AND
4-BY-4 KEYPAD INTERFACE
q RATIOMETRIC CONVERSION
q SINGLE 2.7V TO 3.6V SUPPLY
q SERIAL INTERFACE
q INTERNAL DETECTION OF SCREEN TOUCH
AND KEYPAD
q PROGRAMMABLE 8-, 10-, OR 12-BIT
RESOLUTION
q PROGRAMMABLE SAMPLING RATES
q DIRECT BATTERY MEASUREMENT (0.5V to 6V)
q ON-CHIP TEMPERATURE MEASUREMENT
q TOUCH-PRESSURE MEASUREMENT
q FULL POWER-DOWN CONTROL
q TSSOP-28 AND QFN-32 PACKAGES
X+
X–
Y+
Y–
V_BAT1
V_BAT2
AUX1
AUX2
V_REF
ARNG
A_OUT
C1 C2 C3 C4 R1 R2 R3 R4
Keyboard Scanner
and State Control
Touch Panel
Drivers
Temp Sensor
Battery Monitor
Battery Monitor
MUX
D/A Converter
APPLICATIONS
q PERSONAL DIGITAL ASSISTANTS
q CELLULAR PHONES
q MP3 PLAYERS
DESCRIPTION
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.
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.
SPI is a registered trademark of Motorola.
US Patent No. 624639.
Clock
A/D Converter
Serial
Interface
and
Control
Logic
MISO
SS
SCLK
MOSI
DAV
PENIRQ
KBIRQ
Internal 2.5V
Reference
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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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