Herman Theodorus Actually, I was interested in the parasitic capacitance as it is being used for change in gain parameter of opamp but I think I will go along with the same way as suggested. Thanks anyaway!
Marko,
The ULN2003LV would be the lowest cost solution, but it may not be fast enough.
You could try using analog switches with one side of the switch connected to ground. I attached a list of SPST switches that have an on/off time less than 18nS…
