说明：  AD5320是单通道12位电压输出数模转换器,内含proteus仿真图,能通过矩阵键盘输入一个期望值在ad5320的输出口可到一个模拟电压,花了几天时间做的,仿真通过的.
(AD5320 is a single-channel 12-bit voltage output DAC, including proteus simulation map, through a keyboard input matrix ad5320 output expectations in the mouth can be an analog voltage, spent a few days to do, simulation adopted.)