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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.

Copyright © 2002, Texas Instruments Incorporated

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.

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

APPLICATIONS

q PERSONAL DIGITAL ASSISTANTS

q CELLULAR PHONES

q MP3 PLAYERS

PDA ANALOG INTERFACE CIRCUIT

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.

TSC2000

SBAS257 – FEBRUARY 2002

SPI is a registered trademark of Motorola.

US Patent No. 624639.

A/D Converter

Internal 2.5V

Reference

MUX

Serial

Interface

and

Control

Logic

D/A Converter

MISO

SS

SCLK

MOSI

DAV

PENIRQ

Touch Panel

Drivers

Temp Sensor

Battery Monitor

Battery Monitor

X+

X–

Y+

Y–

V

BAT1

V

BAT2

Clock

AUX1

AUX2

V

REF

ARNG

A

OUT

®

TSC2

000