ADGM1004 has ESD diodes at its RFx & RFC pins when compared to ADGM1304 (which doesn't have).
1. Then shouldn't the leakage at RFx & RFC pins in ADGM1004 be higher when compared with ADGM1304. But according to the data sheet, both the ICs have exactly the same leakage. Then what is the cause of this leakage current ?.
2. The capacitance at RFx pins are lower in ADGM1004 when compared with ADGM1304. Shouldn't it be higher (due to ESD diodes) or at least same (in case package capacitance dominates)?.
Yes ADGM1004 has ESD diodes on all of the RF pins while ADGM1304 don't have ESD diodes, that's why ADGM1004 has 5KV HBM ESD rating on the RF pins and 2.5KV HBM ESD rating on all other pins.
Moved to its proper community Switches/Multiplexers.