按手册上的说明,CM引脚应该是在REFT和REFB之间加了两个800Ω的电阻取中间值,为输入提供偏置,如果我想按手册上的交流耦合电路这样接,REFT和REFB间的两个2K应该已经有了2.5V的偏置电压,可以测量负电压了。那么CM引脚是不是可以不用接了?顺便请教大神,OVR引脚的输入超调报警怎么用?英语不太好看手册略吃力啊.....
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