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关于ads1281调制器输出的疑问

Other Parts Discussed in Thread: ADS1281

技术支持的工程师您好:

我想使用ADS1281做调制器,datasheet上写的输出需要合并两个两阶的调制器:Y[n]=3M0[n-2]-6M0[n-3]+4M0[n-4]+9(M1[n]-2M1[n-1]+M1[n-2]).

现在有以下两个问题:

1.两个调制器都是输出1位的数据流,那合并之后数据流是几位的呢?

2.如果取所有可能的情况,Y[n]的输出范围就是-24~+25,这个又要怎么理解呢?