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AFE4900EVM: AFE4900: High frequency noise of AFE4900

Ilan Ganor
Prodigy 170 points
Part Number: AFE4900EVM
Other Parts Discussed in Thread: AFE4900

Hello 

we are using the AFE4900 official evaluation board to make ECP and SPO2 measurements.
we are using the latest GUI from TI to control the EVB.
The results we are getting have high frequency noise. 
after applying a software only filter, available on the TI GUI (this filter is pure software, on PC side), we are getting good results.

We configured the device to the best configuration we could find using the GUI, I am also attaching those configurations "Device_Analysis_20211031_163359.txt".

please advise if we can expect to achieve a "clean" signal without the filter (if TI placed the option for filter it may indicate the answer?)

if it's possible, please advise how to best set the register values.

Preview attachment Device_Analysis_20211031_163359.txt

Device_Analysis_20211031_163359.txt
2.3 KB

  • 0
    TI__Mastermind 49756 points

    Hello IIan,

    We would like to take this discussion offline since the device AFE4900 is shared under selective disclosure.

    Can you please reach out to biosensing_afe-support@list.ti.com along with a reference to this E2E post?

    Please share the config file via email as we are unable to open the attachment.