The TSC2008 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 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 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 is available in a 12-lead,(1,555 ±0,055mm) x (2,055 ±0,055mm) 3 x 4 array, wafer chip-scale package (WCSP), and a 16-pin, 4 x 4 QFN package. The TSC2008 is characterized for the -40°C to +85°C industrial temperature range.
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, fSCLK = 5MHz
35.5µA at 1.8V, fSCLK = 10MHz
44.6µA at 2.7V, fSCLK = 10MHz
Power-On, Software, and SureSet™ Resets
Enhanced ESD Protection:
±8kV HBM
±1kV CDM
±25kV Air Gap Discharge
±15kV Contact Discharge
1.5 x 2 WCSP-12 and 4 x 4 QFN-16 Packages
APPLICATIONS
Cellular Phones
PDA, GPS, and Media Players
Portable Instruments
Point-of-Sale Terminals
Multi-Screen Touch Control Systems
U.S. Patent No. 6246394; other patents pending.
SureSet is a trademark of Texas Instruments.
SPI is a trademark of Motorola Inc.
All other trademarks are the property of their respective owners.
