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请教关于ADS1248的应用问题

Other Parts Discussed in Thread: ADS1248

TI工程师,

      我想用ADS1248测7路Pt100的值,我想这么做不知方案对不对,就是用一个8通道2选1的多路模拟开关来形成4对温度传感器差分对,接到ADS1248的8个模拟量输入上,这样是两线的温度测量,不知这样的温度精度可以达到多少?可不可以这样接?还有,那个接在REFP0和REFN0间的电阻有什么要求?这样接法我可以每次检测4路Pt100的值,两次就可以采集到7路的了,这样做是否可行?

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