大家好，最近有一个项目打算采用ADA4897-1作为ADC驱动放大器，手动搭接了一个电压跟随器用于测试ADA4897-1，设计采用5V单端供电，信号发生器到运放采用交流耦合的方式，同时在同相端增加一个2.5V偏置电压，使用示波器查看输出波形，发现在输入信号幅度较小时，电路工作正常，但是当输出幅度大于4.2V时，信号出现顶端截止的现象，但是按照手册上说的，其输出摆幅应该在0.2-4.8之间，而且我用pspice仿真时，确实是在4.8V时才截止的，不知道大家碰到过没有，期待您的回复！！
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