触摸屏控制器 TOUCH SCREEN CONTROLLER
DESCRIPON
The ADS7843-Q1 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-Q1 is specified down to 2.7V operation.
1FEATURES
• Qualified for Automotive Applications
• 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
