AFE20408EVM: DAC output voltage ripple

Hi Yang Fan,

The DAC output noise is around 70µVpp, and an output noise density of 700 nV/sqrt(Hz). Let me know if you have any other questions.

Thanks,
Erin

Hi Erin. Thanks for the quick response. I am using EVM and observed a much higher ripple. Can you suggest the setup and equipment you are using for this measurement?

Hi Yang Fan,

What voltage supplies are you using for the inputs? The DACs have around 60db of rejection to input noise, but if your inputs are particularly noisy the DACs will reflect this.

Thanks,
Erin

Hi Erin. Thanks. I think this is not a issue anymore. Another question is what is the major difference between AFE20408 and AMC7908?

Hi Erin, Thanks for the information. We are interest in AMC7908 device but cannot find detailed data sheet on the website. Would you please provide or let me know where I can find it. Thanks!

Hi Yang Fan,

You can request access to view the AMC7908 datasheet and other information using this link:

ti.com/secureresources/AMC7908-DESIGN

Let me know if you have any other questions.

Thanks,
Erin