
SCL
SDA
AD0
Analog
Matrix
Touch
Screen
Drivers
Interface
I C
Serial
Interface
and
Control
2
VDD
AUX
TEMP
Sensor
DAV
PENIRQ
PINTDAV
RESET
GND
Multi-Touch
Control
TouchEngine
with
Analog
Signal
Processing
Internal
Clock
Zoning
Control
Pre-
processing
X
X +
Y +
i
j
i
j
-
Y
SBAS536B
– FEBRUARY 2011 – REVISED MARCH 2011
Analog Matrix TOUCH SCREEN CONTROLLER
with I2C
Serial Interface for 3 × 5 Array
1
FEATURES
APPLICATIONS
Smart Phones, Feature Phones
23
Supports up to 3.5-Inch Analog Matrix Sensor
MIDs, Netbooks, and eBooks
with 3
× 5 Multiple Touch Resolution and
12-Bit Global Resolution
Digital Picture Frames
Portable Instruments
Supports Both Finger and Stylus
MP3 Players, GPSs, PNDs, and PMPs
Ratiometric Conversion
Single 1.6V to 3.6V Supply
DESCRIPTION
Preprocessing to Reduce Bus Activity
The TSC2020 is a very low power, resistive touch
I2C Interface Supports Standard, Fast, and
screen
controller
designed
to
work
with
High-Speed Modes
power-sensitive, handheld applications that are based
on advanced low-voltage processors. This device
Internal Detection of Screen Touch
works with a supply voltage as low as 1.6V that can
Register-Based, Programmable:
be supplied by a single-cell battery. The TSC2020
– Sampling Rates, System Timing, Zoning,
contains
a
complete,
ultra-low
power,
12-bit,
Normal/Fast Scan Mode
analog-to-digital converter (ADC) including sensor
drivers and the control logic to measure touch
On-Chip Temperature Measurement
pressure.
Unlike
other
resistive
touch
screen
Auto Power-Down Control
controllers, the TSC2020 is capable of detecting at
Low Power:
least three touches simultaneously and delivers a
very low power standby touch detection scheme. This
– 70.72W at 1.6V, at 8.2kSPS Eq Rate, ST
flexibility allows for many new applications that
– 87.5W at 1.8V, at 8.2kSPS Eq Rate, ST
require multiple touches but must remain at low
– 675W at 1.8V, at 250SSPS Worst-Case, MT
power.
(average 300
W at 1.8V, 50SSPS, 3T)
The TSC2020 supports the I2C serial bus and data
Enhanced ESD Protection to Assist IEC
transmission protocol for all three defined modes:
Testing:
standard, fast, and high-speed. The TSC2020 offers
– ±12kV Air
programmable resolution, single-/multi-touch modes
to accommodate different screen types, sizes, and
– ±11kV Contact
application needs.
Packages: 5
× 5 QFN-32, 2.5 × 2.5 WCSP(1)
The TSC2020 is available in a 32-pin 5
× 5 QFN
(1)
WCSP (YZK) package available Q2, 2011.
package, and is characterized for the
–40°C to +85°C
U.S. Patent Nos. 6,246,394; 7,812,830; other patents pending.
industrial temperature range.
Functional Block Diagram
1
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.
2
I2C is a trademark of NXP Semiconductors.
3
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright
2011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.