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OPA835遇到的问题

Other Parts Discussed in Thread: OPA835

 

使用TI运算放大器OPA835,在没有输入的情况下,输出会出现20mv左右的noise,以上图片是原理图,layout和噪声的波形.

在空板上搭一样的线路,现象依旧,只是NOISE幅值会小一点.如果把原理图中C12取下,noise就会消失,所以请高手指点一下,谢谢了.