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您好,
LM318 最小供电电压为±5V(或单电源10V),使用单电源5V供电不满足规格要求:
像运放这样的模拟电路一般不允许悬空输入,这可能使输入、输出过载损坏运放。
另外注意满足运放的输入和输出范围。LM318 不是轨至轨输入和输出运放,在单电源供电时输入和输出范围达不到0V。根据datasheet 如下截图,输入需要距离电源轨3.5V,输出需要距离电源轨3V。