单芯片，单电源，直接4-20ma电流转换为，轨到轨0-5V电压输出-Single-chip, single power supply, 4-20ma direct current converter for rail-to-rail voltage output 0-5V

在实际应用中，很多时候需要输出电压、电流等信号，特别是在工控行业中，4-20MA的转换经常要用到，选用AD421芯片来做的话，成本颇高，如果采用单片的PWM输出来做DA完全可以做到14位以上的精度。-In practical application, and many times need to signal of the output voltage, electric current and so on, especially in the industrial control indust

工控，电力，仪表中常常使用4-20mA的信号输出，低成本高精度设计-Is often used in industrial control, electric power, the instrument of 4-20 ma signal output, low cost and high precision design

Fully Isolated, Single Channel Voltage and 4 mA to 20 mA Output with HART Connectivity