小白.4-20mA信号输入到STM32，有+3.3V的转换芯片吗？有转换电路吗 传感器输出4-20MA接了rcv420输出0-5V,怎么样能...
STM32\u5904\u7406\u53d8\u9001\u5668\u8f93\u51fa\u76844-20ma\uff0cSTM32\u7684AD\u8f6c\u6362\u53ea\u80fd\u63a5\u53d70-3.3V\u7684\u7535\u538b\u8f93\u5165\uff0c\u600e\u4e48\u7528\u8fd0\u653e\u5b9e\u73b0\u8f6c\u63624~20mA\u7ecf\u8fc7250\u03a9\u53d6\u6837\u7535\u963b\u5373\u53ef\u8f6c\u53d8\u4e3a1~5V\u3002
\u518d\u7528\u51cf\u6cd5\u5668\u7535\u8def\uff0c\u5c06\u8f93\u51fa\u51cf\u53bb1V\uff0c\u5373\u53ef\u5f97\u52300~4V\u3002\u5c06\u51cf\u6cd5\u5668\u7535\u8def\u7684\u589e\u76ca\u6539\u4e3a3.3/4\uff0c\u5373\u53ef\u5f97\u52300~3.3V\u7684\u8f93\u51fa\u3002
\u7535\u8def\u5982\u4e0b\u56fe\uff1a
\u4e0a\u56fe\u4e2d\uff0cui1\u63a51V\uff0cUi2\u63a51~5V\u3002R1=R2=4k\u03a9\uff0cRF=R3=3.3k\u03a9\uff0c\u8f93\u51fa\u5c31\u662f0~3.3V\u3002
\u53ef\u4ee5\u7528\u7535\u963b\u5206\u538b\u6cd5
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绛旓細PLC鍙互璁剧疆涓嬮檺鍋忕疆鎴4mA,鎴栬呮槸鍐嶅姞涓涓殧绂昏浆鎹㈡ā鍧4-20mA杞0-20mA
绛旓細鏃犳簮浣庨氭护娉㈢數璺
