• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 46 subscribers
  • Views 307 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.

ADS1299-4: About SIG, REF, GND Electrode Connection

Jeongsu Park
Prodigy 30 points
Part Number: ADS1299-4
Other Parts Discussed in Thread: ADS1299

I want to develop a 4-channel EEG meter through the ADS1299-4 chip.

But what I'm curious about is that for brain wave measurement, we usually measure it through three electrodes: SIG electrode, REF electrode, and GND electrode.

Which pin on the ADS1299-4 chip should I use to connect the REF and GND electrodes?

For REF electrodes, it seems to be connected to SRB1 and used. Is this correct?

  • 0
    TI__Mastermind 19815 points

    Hi,

    We are not EEG experts, and usually, typically, there are at least two or more topology(montage) customers use, so customers need to make decision.

    For starter, one could take a look of the ADS1299 datasheet-  

    Figure 72. Example Schematic Using the ADS1299 in an EEG Data Acquisition Application, Sequential Montage

    Figure 73. Example Schematic Using the ADS1299 in an EEG Data Acquisition Application, Referential Montage

    to first decide what topology(montage) or others they want to use.

    Based on the interaction one/application wants those electrodes to be, then one could decide how to connect.

    Thanks