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简要介绍触摸屏的结构及工作原理,并以Burr-Brown公司的触摸屏控制芯片ADS7843为例,介绍触摸屏应用的典型电路和操作。由于ADS7843内置12位A/D,理论上触摸屏的输入坐标识别精度为有效长宽的1/4096。
Briefly introduce the structure and working principle of the touch screen. Take the ADS7843 touch-screen control chip of Burr-Brown as an example to introduce the typical circuit and operation of the touch screen. As the ADS7843 built-in 12-bit A / D, in theory, the touch screen input coordinates recognition accuracy of effective length and width of 1/4096.