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你好,老师，我打算用ads1299做脑电，需要4片ADS1299 采样精度设置为250点，其32导脑电中28导是心电 3导是心电1导是肌电 请问4片ADS1299应该是级联还是菊花链 他们的区别是什么？哪个更好？
