TSC2046E_07 Datasheet, PDF (1/30 Pages) Burr-Brown (TI) – Low Voltage I/O TOUCH SCREEN CONTROLLER

TSC2046E
Low Voltage I/O
TOUCH SCREEN CONTROLLER
SBAS417 − JUNE 2007
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
Pen Detect
+V_CC
PENIRQ
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.
X+
X−
Y+
Y−
V_BAT
AUX
Tem pe rature
Se nsor
Battery
Monitor
6−Channel
MUX
SAR
CDAC
TSC2046E
Comparator
Serial
Data
In/Out
IOVDD
DOUT
BUSY
CS
DCLK
DIN
V_{RE F}
Internal 2.5V Reference
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.
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.
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  2007, Texas Instruments Incorporated
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