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ref3030做电压比较器的input- 的问题

Other Parts Discussed in Thread: LM339, REF3030

ref3030输出做lm339的inut-,为什么输出一直是低电平啊? 不管输入input+是多少都不行?

欢乐个adr441 就行,为什么?我万用表测ref3030输出是3.0v啊?而且他的输出电流 能到50ma啊?