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ADS1246使用问题

Other Parts Discussed in Thread: ADS1246

求助大神:

        我想用ADS1246实现单输入模拟信号的模数转换,在电路搭建遇到以下问题:

1、双向参考端(REFP、REFN)怎么使用;

2、SCLK、CLK,如何选择;

3、串入端口(DIN)不使用时,能否置空;

4、模拟供电和数字供电,接地端可否直接相连?