ADC in VHDL

[Ah_bi]

I have am working with a UP3 board (Altera Cyclone FPGA)

I need to connect and read data a sensor that detect objects. But the sensors output is analong.
Can someone please kindly help me on how should i convert it to digital.
Can it be done using VHDL??
Can anyone also provide links or tutorials in doing so. I have read some of the books and i am trying to work it out. Just need more help.

Thanks in advance!!!