TINA/Spice/ADC161S626: Some question about ADC ADC161S626 model output wave in TINA

Tool/software: TINA-TI or Spice Models

Hi,

I am now using ADC ADC161S626 in TINA and meet the following problem:

1, I am using ADC ADC161S626 to convert a sine wave, but from the output wave shape, part of the wave is disappeared. Could you please tell me how should I adjust the circuit and what causes this problem?  

2, Is there any TINA ADC model which I could get the output wave shape directly instead of connecting a DAC behind?

Thank you!3146.Separate Excitation and Ref (Ideal).TSC