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XTR115实现的两线制电路的问题

Other Parts Discussed in Thread: XTR115

请教各位大神,最近在用XTR115来设计一个4-20ma输出的电路,看了一下XTR115的资料,我想用XTR115的VREG(第8脚)提供的5V电压给CPU以及整个电路供电,整机电流不超过4ma,不知道是否可行。谢谢