ADS7843集成电路（IC）的触摸屏控制器规格书PDF中文资料

ADS7843属于集成电路（IC）的触摸屏控制器。由德州仪器制造生产的ADS7843触摸屏控制器触摸屏控制器是一种集成电路，可在触摸屏传感器阵列与屏幕操作的设备之间提供接口。该控制器从传感器阵列（通常是电阻式或电容式）接收位置信息。然后，位置信息又通过串行、并行、USB 或 UART 接口传递给微控制器。

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

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. 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 specified down to 2.7V operation.

Low power, high speed, and onboard switches make the

ADS7843 ideal for battery-operated systems such as personal

digital assistants with resistive touch screens and other

portable equipment. The ADS7843 is available in an

SSOP-16 package and is specified over the –40°C to +85°C

temperature range.