interface an external high precision low noise delta-sigma ADC with Arduino

virk_ps:
unfortunately not and i am not able to understand why?

Please post the latest version of all of your code so we can see exactly what you have done and how it works together.

Serial.print() is quite slow - you should certainly not be expecting to print anything hundreds of times per second. And what would be the point - you can't read that fast.

...R