Hi I am using the ADG1211 is my application board simulation ( downloaded the spice model for AD website). When the switch is off that time I am seeing 500nA of leakage but the data sheet says that it is few pA. Can anybody help me about this.
The leakage seen could have been caused by the primitive switch models (SMOD 1 to 7). As a quick fix, try to change ROFF from 1E11 to 1E12 and start from there.
Please see figure below.