I'd like to get a rough idea how the TMUX4052 works in an analog circuit - since the only model available is an IBIS model, I'd like to put something roughly equivalent into TINA just using the switch resistance and capacitance values. However, from the datasheet, I'm not entirely sure where to model the capacitive elements.
I specifically want to check a situation where the device is enabled, meaning one channel is 'ON' and the other 3 are 'OFF'. I see from datasheet that Cs(off) is 3pF, so I assume I can just put a 3pF capacitor to GND from each of the 3 'OFF' channels.
Since the device is enabled, I assume the Cd(off) spec is irrelevant, since 'D' will always be 'ON' and connected to one of the 'S' pins?
But, what about the 7pF specified for Cs(on), Cd(on)? Is this saying that there will be 7pF from 'D' to GND and also from the selected 'S' channel to GND (14pF in total)? Or does it only appear at one side? Or can I split it in half and put 3.5pF on both the 'D' side and the selected 'S' pin?
Picture below shows what I think is reasonable - 4x S channels on left, D on the right. First 'S' channel is active with 60R on resistance, other channels not active with 1G in series and 3pF to GND (off). It shows 7pF to GND at the active 'S' channel and another 7pF to GND at the 'D' pin. Is this reasonable?
Any guidance as to what capacitance values to use would be welcome.
