• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 46 subscribers
  • Views 72 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ADS1299: Regarding the connection issue of three ADS1299 chips

tan tan
Prodigy 10 points
Part Number: ADS1299

Tool/software:

Dear TI engineer:
Hello, I encountered some confusion while designing a 24 channel EEG and drawing the schematic diagram for connecting three ADS1299 chips. I have the following two questions to ask
1: Assuming I design a 24 channel EEG to connect three ADAS1299 chips, using SRB1 or SRB2, should I connect the three SRBs after using one of them
2: Should three ADS1299 chips, BIASUT, BIASN, BIASNV, and BIASREF, be connected using one chip or all three? How should they be connected
We look forward to your reply!
thank you!!

  • 0
    TI__Guru 66156 points

    Hello Tan,

    Thank you for your post. 

    If you want to share a single reference electrode to all ADS1299 devices, I would suggest to include a low-noise amplifier for each ADS1299 to buffer the SRB1 input pin. You can include a provide to short around the buffer if you find that it is not necessary.

    The datasheet describes the necessary BIAS amplifier connections when using multiple devices:

    Regards,

    Ryan