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请问DAC122S085 DAC芯片有驱动例子吗？我是基于CC2650 CPU上画的电路图，
我现在调试DAC122S085芯片，LM404的基准电压没有，我把基准电压搞到3V,spi_clk没有波形，其他spi_somi，SYNC都有波形，请
问有什么建议吗？已经焊接好了。这颗芯片有参考例程吗？
cc2650 是3V供电，DAC122S085的REF基准电压是LM4040C25MDBZTEP提供，这个片子可以提供2.5V和3V电压产生REF，
我现在给DAC122S085也是3V供电
