FEATURES

D Same Pinout as ADS7846

D 2.2V to 5.25V Operation

D 1.5V to 5.25V Digital I/O

D Internal 2.5V Reference

D Direct Battery Measurement (0V to 6V)

D On-Chip Temperature Measurement

D Touch-Pressure Measurement

D QSPI and SPI 3-Wire Interface

D Auto Power-Down

D Exceeds IEC 61000-4-2 ESD Requirements

−

+15kV Contact Discharge

− No External Components Needed

D Available In TSSOP-16, QFN-16, and

VFBGA-48 Packages

APPLICATIONS

D Personal Digital Assistants

D Portable Instruments

D Point-of-Sale Terminals

D Pagers

D Touch Screen Monitors

D Cellular Phones

US Patent No. 6246394

DESCRIPTION

The TSC2046E is the next-generation version of the

ADS7846 4-wire touch screen controller, supporting a

low-voltage I/O interface from 1.5V to 5.25V. The

TSC2046E is 100% pin-compatible with the existing

ADS7846, and drops into the same socket. This design

allows for an easy upgrade of current applications to the

new version. The TSC2046E also has an on-chip 2.5V

reference that can be used for the auxiliary input, battery

monitor, and temperature measurement modes. The

reference can also be powered down when not used to

conserve power. The internal reference operates down to

a supply voltage of 2.7V, while monitoring the battery

voltage from 0V to 6V.

The low-power consumption of < 0.75mW typ at 2.7V

(reference off), high-speed (up to 125kHz sample rate),

and on-chip drivers make the TSC2046E an ideal choice

for battery-operated systems such as personal digital

assistants (PDAs) with resistive touch screens, pagers,

cellular phones, and other portable equipment. The

TSC2046E is available in TSSOP-16, QFN-16, and

VFBGA-48 packages and is specified over the –40

°C to

+85

°C temperature range.

CDAC

Internal 2.5V Reference

SAR

TSC2046E

Comparator

6−Channel

MUX

Serial

Data

In/Out

Tem pe rature

Se n s or

Pe n D e tec t

Battery

Monitor

DOUT

BUSY

CS

DCLK

DIN

VBAT

AUX

V

RE F

+V

CC

IOVDD

X+

X

−

Y+

Y

−

PENIRQ

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.

www.ti.com

Copyright

 2007−2008, Texas Instruments Incorporated

SPI and QSPI are trademarks of Motorola Inc.

Microwire is a trademark of National Semiconductor Corporation.

All other trademarks are the property of their respective owners.

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.

TSC2046E

SBAS417B − JUNE 2007 − REVISED JANUARY 2008

Low Voltage I/O

TOUCH SCREEN CONTROLLER