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DAC8811: 输入正压输出负压

Part Number: DAC8811
Other Parts Discussed in Thread: OPA277

 datasheet显示的是Vref是负压,输出Vout是正压,我想实现Vref是正压,但是Vout想输出负压,我将运放的电源轨道变为±2.5V 是否可行?如果不可信请告诉我应该怎么做,最好有原理图