PDA Analog Interface Circuit 28-Pin TSSOP Rail

The TSC2200 is a complete PDA analog interface circuit. It contains a complete 12-bit, Analog-to-Digital (A/D) resistive touch screen converter including drivers, the control to measure touch pressure, keyboard controller, and an 8-bit Digital-to-Analog (D/A) converter output for LCD contrast control. The TSC2200 interfaces to the host controller through a standard SPI serial interface. The TSC2200 offers programmable resolution and sampling rates from 8- to 12-bits and up to 125kHz to accommodate different screen sizes. The TSC2200 also offers two battery-measurement inputs capable of reading battery voltages up to 6V, while operating at only 2.7V. It also has an on-chip temperature sensor capable of reading 0.3°C resolution. The TSC2200 is available in a TSSOP-28 and a QFN-32 package.

4-WIRE TOUCH SCREEN INTERFACE AND 4-BY-4 KEYPAD INTERFACE

RATIOMETRIC CONVERSION

SINGLE 2.7V TO 3.6V SUPPLY

SERIAL INTERFACE

INTERNAL DETECTION OF SCREEN TOUCH AND KEYPAD

PROGRAMMABLE 8-,10-,OR 12-BIT RESOLUTION

PROGRAMMABLE SAMPLING RATES

DIRECT BATTERY MEASUREMENT (0.5V to 6V)

ON-CHIP TEMPERATURE MEASUREMENT

TOUCH-PRESSURE MEASUREMENT

FULL POWER-DOWN CONTROL

TSSOP-28 PACKAGE AND QFN-32 PACKAGES

APPLICATIONS

• PERSONAL DIGITAL ASSISTANTS
• CELLULAR PHONES
• MP3 PLAYERS