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DAC80504: 怎样准确合理测试单板上DAC输入的系统噪声?

Part Number: DAC80504

请教,我们做的数/模混合电路,板上有ADC与DAC ; 

ADC的系统噪声测试,就是把输入短路or开路,记录ADC的输出 ;基本可以评价系统ADC的噪声大小;

请教DAC的噪声怎样测试,烦请推荐准确合理的测试方法,及测试工具配置;

感谢~