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做光伏逆变,需要检测220V的交流电压,求推荐合适的差分放大器
不应该是直接连接 220V 交流的, 你总是要电阻降压后输入的。
看你降压多少倍再输入, 去选择运放吧。
一般应该降低百倍吧, 普通的运放就能满足了。