大家好,
用了lm7705的evm板,想测试一下lm的charge pump频率是否会造成多余的噪声,lm7705的噪声如下》》
然后测试了没有信号输入时,lm7705和OPA的噪声,如下图
请问是什么原因造成了这个opa能产生这样的噪声呢?型号是lmp7716
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