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ads1255的参考输入为ref20XX时,如何正确滤波

Other Parts Discussed in Thread: ADS1255

  ads1255的datasheet基本电路中参考输入加了rc滤波。ref20XX的Stable output capacitor range最大值为10uF。如果以ref20XX为参考输入,该如何在adc的输入端滤波呢,怎么判别是否稳定?不是很清楚如何计算电路的容性负载,有什么好的资料能否分享一下?谢谢!