LM4562: 我想设计一个低噪声的50Hz，100Hz陷波器，有推荐的芯片选型吗？

您好，

已经收到了您的案例，调查需要些时间，感谢您的耐心等待。

Dear TI engineers:

I would like to design a low-noise 50Hz notch filter. The first requirement is that its PSD noise should be sufficiently low: 1uV/rt(Hz) at 1Hz, 10nV/rt(Hz) at 10KHz. Then its power consumption should be less than or equal to 10mA. I would like to ask if this can be achieved at the analog end? We have tried the basic UAF42, dual T, and Fliege, but none of them meet our requirements. It is still recommended that I can only achieve it through digital filtering methods.

对于您的具体要求，我们没有实际的设计可供参考。

建议合理选择运算放大器和电阻值，注意元件容差、温度稳定性以保持陷波深度，并通过仿真验证噪声性能。

尊敬的Taylor工程师您好：
我想问的是这种低噪声的陷波器真的可以构建吗？因为我是五个通道需要5个陷波器，无论是UAF42还是Fliege模型，都不满足我们的需求，您建议我们在模拟端进行滤波还是数字端在MCU中进行呢

这个我们没有实际的验证，所以很难给出具体的建议。

如果模拟端难以实现，可以考虑在MCU中进行。