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【求助】用2个XTR116U做2路4~20mA输出电路的问题

Other Parts Discussed in Thread: DAC7512, XTR116, DAC161S997, XTR111, DAC8551

2组 DAC7512+XTR116U 做2路4~20mA输出

2个DAC的地肯定是共地的

XTR116的Iret连DAC的gnd

那么2个XTR116的Iret就是连在一起的,这时 2路输出都是错的

把其中一个xtr116的Iret断开,另外一个就正常了

这是什么原因?