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DAC7811问题

Other Parts Discussed in Thread: DAC7811

使用了软件SPI,用示波器看到波形是正确的,但是在将4095发给DAC7811之后,只测得输出的电压不到1V,也就0.97V左右的样子,原理图是按照芯片手册给的推荐电路设计的。参考电压是4V。