16DAC芯片AD421应用,C51源程序-16DAC chip AD421 application, C51 source code

51单片机接入差分信号重量传感器，设定额重，输出控制，同时DA转换（AD421芯片）输出4-20mA。-51 single access differential signal of the weight sensor, set the amount of weight, output control, while the DA converter (AD421 chip) output 4-20mA.