DESCRIPTION
●The ADS7843 is a 12-bit sampling analog-to-digital converter (ADC) with a synchronous serial interface
●and low on-resistance 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 +VCC, providing a corresponding input voltage range of 0V to VREF. The device includes a shutdown mode which reduces typical power dissipation to under 0.5µW. The ADS7843 is guaranteed down to 2.7V operation.
●FEATURES
●4-WIRE TOUCH SCREEN INTERFACE
●RATIOMETRIC CONVERSION
●SINGLE SUPPLY: 2.7V to 5V
●UP TO 125kHz CONVERSION RATE
●SERIAL INTERFACE
●PROGRAMMABLE 8- OR 12-BIT RESOLUTION
●2 AUXILIARY ANALOG INPUTS
●FULL POWER-DOWN CONTROL
●APPLICATIONS
●PERSONAL DIGITAL ASSISTANTS
●PORTABLE INSTRUMENTS
●POINT-OF-SALES TERMINALS
●PAGERS
●TOUCH-SCREEN MONITORS
