Hello，

I'm using  AD8352 as the ADC driver，I find that the datasheet of AD8352 only describe RTI Spectral Noise Density,

And the There is no corresponding model in “Diff-amp calculator” software. I need the output Spectral Noise Density. How to calculate it？

Parents
• Hi draogn,

To compute the output spectral noise density, I'd think you just need to multiply the RTI noise density value by the appropriate gain for the value of RG that you've chosen.

For example, with RG = 150ohm, from the following Figure 21 graph RTI noise density is 3nV/RtHz:

Also, from Figure 24 you can see that this RG value results in a gain of around 11dB (=3.55 V/V):

So, the output noise density is found:

3nV/RtHz * 3.55 V/V = 10.6nV/RtHz (output referred noise density)

Regards,

Hooman

• Hi draogn,

To compute the output spectral noise density, I'd think you just need to multiply the RTI noise density value by the appropriate gain for the value of RG that you've chosen.

For example, with RG = 150ohm, from the following Figure 21 graph RTI noise density is 3nV/RtHz:

Also, from Figure 24 you can see that this RG value results in a gain of around 11dB (=3.55 V/V):

So, the output noise density is found:

3nV/RtHz * 3.55 V/V = 10.6nV/RtHz (output referred noise density)