Simulation failed due to Convergence time issue in Multisim

[ahhad180]

I made a R2-R DAC ladder. In order to test it, i used the generic ADC (8-bit) in the library. My goal was to find if my DAC could correctly sample and filter quantized signal. The maximum input frequency being 20KHz. I kept sampling at 200KHz.

I was unable to simulate this, i tried to trouble shoot the problem but it failed. 

P.s I used SPDT switches as i needed to operate the DAC at 10/0 V rather than the TTL 5/0V.

Please advise me how can i tackle this problem.

[SasounT]

Hello,

have you tried following the steps outlined in the below article:
http://digital.ni.com/public.nsf/allkb/A65253BD02F585CD86257A6B0049945D

Best regards