Root Mean Squared (RMS) Noise of OpenLD

Here is the plot of the noise recorded by the OpenLD hardware. In order to measure this noise, the electrodes were all shorted out by connecting the positive channel inputs to SRB1 and the BIAS pin. For the ADS1299 configuration, the PGA gain is set to 24 and 4 channels were powered on.

The datasheet indicates that the RMS Error (equivalent to the standard deviation) of the signals (at 24x gain and 250SPS) are approximately 0.14uV (pg. 7; Table 4). If you look at the diagram above, the RMS values of the signals recorded by the OpenLD is also around 0.14uV. Brilliant.