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UCC28950: PMP8740疑问

Part Number: UCC28950
Other Parts Discussed in Thread: INA199, OPA378

1、请问R102在这里的作用是什么?IOUT从0...2变化,这里不需要上拉电阻都可以吧?

2、OPA378能用INA199代替吗?把外围增益元件去掉!