TSC2008-Q1 Datasheet, PDF (1/39 Pages) Texas Instruments – 1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire Micro TOUCH SCREEN CONTROLLER with SPI™

TSC2008-Q1
www.ti.com
1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire
Micro TOUCH SCREEN CONTROLLER with SPI™
Check for Samples: TSC2008-Q1
SBAS552 – JUNE 2011
FEATURES
1
•234 Qualified for Automotive Applications
• 4-Wire Touch Screen Interface
• Single 1.2V to 3.6V Supply/Reference
• Ratiometric Conversion
• Effective Throughput Rate:
– Up to 20kHz (8-Bit) or 10kHz (12-Bit)
• Preprocessing to Reduce Bus Activity
• High-Speed SPI (up to 25MHz)
• Simple Command-Based User Interface:
– TSC2046 Compatible
– 8- or 12-Bit Resolution
• On-Chip Temperature Measurement
• Touch Pressure Measurement
• Digital Buffered PENIRQ
• On-Chip, Programmable PENIRQ Pull-up
• Auto Power-Down Control
• Low Power (12-Bit, 8.2kHz Eq Rate):
– 30.4μA at 1.2V, f_SCLK = 5MHz
– 35.5μA at 1.8V, f_SCLK = 10MHz
– 44.6μA at 2.7V, f_SCLK = 10MHz
• Power-On, Software, and SureSet™ Resets
• Enhanced ESD Protection:
– ±8kV HBM
– ±1kV CDM
– ±25kV Air Gap Discharge
– ±15kV Contact Discharge
• Latch-Up Exceeds 100 mA per JESD78B -
Class I
• 4 x 4 QFN-16 Package
U.S. Patent No. 6246394; other patents pending.
APPLICATIONS
• Multi-Screen Touch Control Systems
DESCRIPTION
The TSC2008-Q1 is a very low-power touch screen controller designed to work with power-sensitive, handheld
applications that are based on advanced low-voltage processors. It works with a supply voltage as low as 1.2V,
which can be supplied by a single-cell battery. It contains a complete, ultra-low power, 12-bit, analog-to-digital
(A/D) resistive touch screen converter, including drivers and the control logic to measure touch pressure.
In addition to these standard features, the TSC2008-Q1 offers preprocessing of the touch screen measurements
to reduce bus loading, thus reducing the consumption of host processor resources that can then be redirected to
more critical functions.
The TSC2008-Q1 supports an SPI serial bus and data transmission. It offers programmable resolution of 8 or 12
bits to accommodate different screen sizes and performance needs.
The TSC2008-Q1 is available in a 16-pin,4 x 4 QFN package. The TSC2008-Q1 is characterized for the –40°C to
+105°C industrial temperature range.
X+
X-
Y+
Y-
AUX
Touch
Screen
Sensor
Drivers
TEMP
VDD/REF
Mux
SAR
ADC
Internal
Clock
SPI
Serial
Interface
and
Control
PENIRQ
CS
SCLK
SDI
SDO
GND
Figure 1. 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.
SureSet is a trademark of Texas Instruments.
2
SPI is a trademark of Motorola Inc.
3
All other trademarks are the property of their respective owners.
4
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated