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Analog
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Touch
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Drivers
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I C
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VDD
AUX
TEMP
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DAV
PENIRQ
PINTDAV
RESET
GND
Multi-Touch
Control
TouchEngine
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Control
Pre-
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i
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-Y
TSC2020
www.ti.com
SBAS536B – FEBRUARY 2011–REVISED MARCH 2011
Analog Matrix TOUCH SCREEN CONTROLLER
with I
2
C™ Serial Interface for 3 × 5 Array
Check for Samples: TSC2020
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
• I
2
C 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
– 70.72µW at 1.6V, at 8.2kSPS Eq Rate, ST
flexibility allows for many new applications that
– 87.5µW at 1.8V, at 8.2kSPS Eq Rate, ST
require multiple touches but must remain at low
– 675µW at 1.8V, at 250SSPS Worst-Case, MT
power.
(average 300µW at 1.8V, 50SSPS, 3T)
The TSC2020 supports the I
2
C 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.
2I
2
C is a trademark of NXP Semiconductors.
3All 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.
