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OPA454高压运放 在0-1.8V范围内无法放大!!!

描述1测试了8脚(E/D)相对于1脚(E/D COM)脚的电压为4.67VPOWERPAD链接在GND上(V-);

 

描述2: 测试输入信号:0V-1.8V的直流输入信号,无法进行放大。

               1.8V-5V输入信号,是可以放大的。

描述351K 10K  的电阻更换为23K4.7K ,依然无效!

 

请各位指导指导,谢谢大家了!!!