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OPA454的E/D引脚与正负电源引脚之间的电压互相影响

Other Parts Discussed in Thread: OPA454

1.首先我们采用的是TI公司的OPA454搭建了如下电压放大结构:

2.问题是,当我V+和V-引脚不施加外界电压、单独供+5V电压到PIN8(E/D)时,测量发现V+端电压为+4.056V、V-端电压为-0.768V,请问这是什么原因?

3.如果后续我将V+、V-以及E/D端电压同时加上去,会不会对我的信号产生影响?