Other Parts Discussed in Thread: ADS1299,
Tool/software:
Hello !
I have observed that the OpenBCI circuit equipped with the ADS1299 chip outputs the desired signals.
However, to minimize the design space, I want to explore the feasibility of using the ADS1291 chip by creating a smaller module.
I understand that the 1-channel chip has a higher noise level of 8uV-pp, but ensuring that the circuit operates correctly is my first priority.
Therefore, although this is a somewhat basic circuit design, I have tried my best to come up with the following design.
I would appreciate your review and feedback.
The input signal is an EEG signal(+ - 1uV ~ 100uv ??) from a dry silver electrode(plating on brass), with an expected input impedance of around 5 to 20 kΩ.
Currently, I plan to use the internal clock and control the output pins through an MCU(Arduino, nRF, STM, ...) initially.
Since I don't have enough time to create a dedicated PCB, I plan to build it on a prototyping board.
I have also extracted RLDOUT separately in case a reference electrode is needed!
