TSC2000_13 Datasheet, PDF (1/38 Pages) Texas Instruments – PDA ANALOG INTERFACE CIRCUIT

TSC2000 _®
TSC2000
SBAS257 – FEBRUARY 2002
PDA ANALOG INTERFACE CIRCUIT
FEATURES
q 4-WIRE TOUCH SCREEN INTERFACE
q RATIOMETRIC CONVERSION
q SINGLE 2.7V TO 3.6V SUPPLY
q SERIAL INTERFACE
q INTERNAL DETECTION OF SCREEN TOUCH
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-20 PACKAGE
X+
X–
Y+
Y–
V_BAT1
V_BAT2
AUX1
AUX2
V_REF
ARNG
A_OUT
Touch Panel
Drivers
Temp Sensor
Battery Monitor
Battery Monitor
D/A Converter
MUX
APPLICATIONS
q PERSONAL DIGITAL ASSISTANTS
q CELLULAR PHONES
q MP3 PLAYERS
DESCRIPTION
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.
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.
Clock
A/D Converter
Serial
Interface
and
Control
Logic
MISO
SS
SCLK
MOSI
DAV
PENIRQ
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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Copyright © 2002, Texas Instruments Incorporated