Datasheet Summary
SBAS090B
- SEPTEMBER 2000
- REVISED MAY 2002
TOUCH SCREEN CONTROLLER
Features q 4-WIRE TOUCH SCREEN INTERFACE q RATIOMETRIC CONVERSION q SINGLE SUPPLY: 2.7V to 5V q UP TO 125kHz CONVERSION RATE q SERIAL INTERFACE q PROGRAMMABLE 8- OR 12-BIT RESOLUTION q 2 AUXILIARY ANALOG INPUTS q FULL POWER-DOWN CONTROL
APPLICATIONS q PERSONAL DIGITAL ASSISTANTS q PORTABLE INSTRUMENTS q POINT-OF-SALES TERMINALS q PAGERS q TOUCH SCREEN MONITORS
DESCRIPTION
The ADS7843 is a 12-bit sampling Analog-to-Digital Converter (ADC) with a synchronous serial interface and low onresistance switches for driving touch screens. Typical power dissipation is 750µW at a 125kHz throughput rate and a +2.7V supply....
