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问题可能出现在输入端的R4, 提高了输入的共模电压，您可以参见手册的Figure 9-2.Input Common-Mode Voltage vs Output Voltage at G = 1 V/V了解输入共模电压与输出电压范围的关系，也可以通过input and output range design calculator工具得出具体的输入电压范围。
