adum5000设计威廉希尔官方网站 上电发烫

我采用adum5000设计了一个威廉希尔官方网站 ，连续焊接了2块芯片，上电就烫手烫的厉害。数据手册上写到1和7脚，10和16脚在内部连接，但是我用万用表测量这2个引脚有40-70kΩ的电阻。我的威廉希尔官方网站 如下图所示。请问为何芯片会发烫，为何1和7脚，10和16脚会有40-70kΩ的电阻。Pin 1 and Pin 7 are internally connected to each other, and it is recommended that both pins be externally connected to a common power source.
Pin 10 and Pin 16 are internally connected to each other and connecting both externally is recommended.