EDA sensor AD5940 output raw signal fluctuation

Hello,

I am working on the acquisition of the EDA signal from our design using the AD5940 by comparing it with the signal received from the EVAL-AD5940BIOZ.

I find out that without using electrodes, the signal received from our prototype has fluctuations with large amplitude compared to the signal received from the eval AD5940.

I put in attachment the schematic of our prototype and the comparison between the two signals.

In addition, the output signal of the new design has a large offset component, how can I reduce this component.

For the firmware, I'm using the same code and examples provided by Analog Device.

Could you please review my schematic (attached) to acquire a better signal.

PDF

Regards.