Thanks for your questions. While we are not experts in EEG, I think I can provide some guidance here:
Does this help clarify the EVM connections?
Precision Analog ΔΣ ADCs
In reply to Ryan Andrews:
Thanks for your guidance. I really appreciate your help.
Yes, the earlobe electrode is intended to be the reference electrode, I am sorry for not clarifying it before. Now I think I understand the reference electrode connection.
a. If I connect left/right frontal electrode to pin 36/32 of J6 respectively, I can connect the earlobe electrode to pin 35/31/AIN1, is that right? (jumpers the other channels and 33-34 and 29-30 are connected, and SRB1 bit not set)
b. Do you mean I can directly connect the reference electrode on pin6 of JP25 and set the SRB1 bit in MISC1 register without connecting pin 33-34 and 29-30 in J6 because those pins 34 and 30 are already connected to SRB1? How should I set those pins on JP25?
In regard of the Bias electrode, I understand it is like the Right Leg Drive circuit in ECG recording. Should I use pin 4 to connect the bias electrode out? How should I set other pins in JP25?
I am so confused by the “JP81(25) Setting” in the diagram. Thank you so much for helping out.
In reply to Xinling Geng:
I have the same doubts as you .... How you solved it? I have the following figure, but doesnt work... in the software I didnt change anything. I'm looking for Section 7....to triying
Did you find out to which pin Bias_Elec should be connected to?
In reply to Carolina Moncion:
Thank you Ryan!
Just to clarify...
If I decide to use BIASOUT as the source for BIAS_ELEC I would leave JP6 uninstalled and place a jumper on JP1 [1-2]. For the software in CONFIG3, is there something specific I need to select?
If I decide to use an external buffered mid-supply voltage, I would leave JP1 uninstalled and place a jumper on JP6 [1-2]. Then in the software for CONFIG3, I would enable the BIAS Buffer and leave BIAS Measurement open?
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.