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DM368中VEDIO DAC电路问题

Other Parts Discussed in Thread: TLV431

    现在需要用到TMS320DM368中的TVOUT功能,datasheet提到要为VREF引脚提供0.5V的电压,作为DAC的参考电压。为了TVOUT正常工作对这个电压有什么具体要求?TVOUT的输出幅值大约多少?368的一份参考原图中用了一个TLV431(Voltage Reference )提供电压1.24V,后经过电阻分压得到0.5V。TLV431这个器件感觉有点老,有没有什么建议?感谢你的回答?