ADS7843IDBQRQ1

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