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您好,
1) 可以
2)有风险,需要有直流通路来保证共模电压范围。
3) 没明白,请参考数据手册“Figure 8-1”使用芯片。
AMC1301 Precision, ±250-mV Input, Reinforced Isolated Amplifier datasheet (Rev. G) (ti.com)