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TLV2264的问题?

Other Parts Discussed in Thread: TLV2264

板子上使用TLV2264作为滤波放大器,接上放大器电源后,没有输入信号,却测得放大器输入有电压值,可以达到1.5v,请问这正常吗,还是放大器是损坏的?