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ADG1406 source charge injection

Question asked by carls on May 11, 2018
Latest reply on May 14, 2018 by carls

I would like to use the Multiplexer 'in reverse', charging several S/H capacitors (around 100nF) with one DAC one after another (simplified picture).

I need the low Rds_on, so using ADG12xx is not possible.

 

I'm missing the source charge injection in the datasheet, effectively figure 33 in the datasheet with source/drain swapped.

Is it in the same range or worse? Are there compensation capacitances?

 

Are there any numbers available? Best would be at +-15V supply and over the full range (worst case or plot).

 

Thanks,

 

Carl

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