ADS7843 - TOUCH SCREEN CONTROLLER
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.
The reference voltage (VREF) can be varied between 1V and
ADS7843 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 POIN
