如果选择内部参考,那么VREFP应该是多少呢?还是2.5V吗?为什么我的不是?
cheng sun:
sbau171b上是这么说的
Decapton Wang:
从ADS1298手册第5页看,内部基准应该是2.4V和4V,通过CONFIG3.VREF_4V这个寄存器来选择。对于内部基准的输出,可以参照手册29页图35,从这幅图看,内部基准输出时,是通过一个内部的buffer先放大一下的。
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