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运放单电源供电,在TINA中模拟输出不正常

Other Parts Discussed in Thread: LM318, LM7171

下图是LM318的仿真图,在单电源10V供电时的输入共模电压范围 应为3.5V-6.5V,输出电压范围2V-8V,但是输入0.5V时,输出的低电平为2V,与 数据表对应    

这个下面 是 换成LM7171,在单电源10V供电时的输入共模电压范围 应为1.65V-8.35V,输出电压范围1.5V-8.5V,但是输入0.5V时,输出为0,按照数据表输出应为 1.5V,麻烦大神解释一下