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OPA454 单电源供电做跟随器输出 空载正常 加上负载 输出不正常

Other Parts Discussed in Thread: OPA454

OPA454 单电源供电做跟随器输出 单电源100V供电   空载时 输出正常 基本上接近100V  

输出加上一个10K的电阻 调节输入信号 0-50V时 输出正常 输入超过50V时 输出电压基本不变  为什么?