ADS7843E اورجینال

نقد و بررسی اجمالی

ای سی تاچ اسکرین مقاومتی (صفحه لمسی) با مبدل ولتاژ 12 بیتی داخلی و رفرش 125 کیلو هرتز با قابلیت تنظیم حساسیت توسط پایه VREF بین 1 تا 5 ولت TOUCH SCREEN CONTROLLER

 دریافت دیتا شیت

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

Low power, high speed, and on-board 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 a 16-lead SSOP package and is guaranteed over the –40°C to +85°C temperature range

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