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FDC1004: Phenomenon when changing the CAPDAC posted last time

Part Number: FDC1004

Dear Sharath, other TI Team meambers,

 

When I received advice on the phenomenon when changing CAPDAC in the following post, I received a request for additional experiments from Mr. Sharath.

https://e2e.ti.com/support/sensors/f/1023/t/934589?tisearch=e2e-sitesearch&keymatch=FDC1004

 

Based on his advice, I changed the capacitance connected to CIN4 to a capacitor of 12pF, 24pF and measured it with the same device (Sample A, B) as in the above post, the phenomenon was reproduced, and other devices (Referrence) There was a different tendency.

(I also confirmed the contents of the additional experiment that Mr. Sharath advised.)

 

I would like to share the measurement data with you and give me advice on the factors, so can you communicate offline such as private messages?