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找了一篇文档看,发现有很多不解(seven steps to successful adc design)

Hi,TI的FAE们,sorry,看到一篇ADI的关于如何设计ad的文档,有些不解。

文档中,step 1 and 2,里面说一个250mVp-p的10Khz信号,25uvp-p的noise,算信噪比的时候,noise的RMS值是25uv/6,这个分母6是怎么计算的?

还有,step4 里面的

How much noise is allowed at the input of the opamp?

Remember that we need to design an overall solution whose

noise density does not exceed 416 nV/rt-Hz.

这点我有点不同意啊。

运放的voltage noise density,应该是noise rms voltage=4.16uv=root(noise power)=root(voltage noise spentral density的平方对频率的积分 )。

1.jpg


不知道TI的FAE对这个是如何认为的?

TI有没有相应的文档啊,多谢多谢

登陆deyisupport的速度比adi的快多了。

Seven Steps to Successful design Analog_to_Digital_Signal_Conversion_FINAL.pdf