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PGA411 的功能选择开关问题



有三个问题,期待回答,不胜感激:

1、如上图所示的功能开关,在设计的时候必须配置上拉和下拉电阻吗,可否直接连到电源和地上?

2、该器件在官网已搜索不到了,是否已停产,如果没有停产,能否持续供货?

3、该器件是否有例程和原理图参考设计。