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您好，请问，TI有没有可用于产生4-20ma电流的芯片组，谢谢！
现有的恒流源芯片没有能产生1mA以上电流的。
但是如果您对电流精度要求不高，可以试试经典方法，将LM117等稳压器用作恒流源，电路如下。只要调整电阻R1就可以得到所需电流。
