Other Parts Discussed in Thread: ADS1299
ADS129x的datasheet中CMRR为-115dB。那么小吗?
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您好,您的意思是按照我们之前对CMRR的定义的理解,差模信号增益与共模信号增益的绝对值,那么CMRR这个值应该是正值,并且越大越好,对吧?
参考这篇ADC参数介绍的应用手册,可以看到CMRR的定义如下:输出的数字信号与所输入的共模信号的变化量的比值。