Maxim MAX11800-803电阻型触摸屏控制方案
Maxim 公司的MAX11800–MAX11803是低功耗超小型电阻型触摸屏控制器,集成了I2C/SPI接口,单电源1.7V到3.6V工作.器件包括一个12位SAR ADC和复接器,主要应用在移动通信设备,PDA, GPS接收器,媒体播放器,手提仪表,POS终端,手持游戏机,汽车中心控制台.本文介绍了MAX11800–MAX11803主要特性, 功能方框图, 位置和压力测量图, 触摸检测电路和应用电路.
MAX11800–MAX11803:Low-Power, Ultra-Small Resistive Touch-Screen Controllers with I2C/SPI Interface
The MAX11800–MAX11803 low-power touch-screen controllers operate from a single supply of 1.70V to 3.6V, targeting power-sensitive applications such as handheld equipment. The devices contain a 12-bit SAR ADC and a multiplexer to interface with a resistive touch-screen panel. A digital serial interface provides communications.
The MAX11800–MAX11803 include digital preprocessing of the touch-screen measurements, reducing bus loading and application-processor resource requirements. The included smart interrupt function generator greatly reduces the frequency of interrupt servicing to the devices. The MAX11800–MAX11803 enter low-power modes automatically between conversions to save power, making the devices ideal for portable applications.
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