Digitisation of eye movements

a brief description of my project follows:

working on a project that deals with the control of home appliances using eye movements... for this we use EOG signals generated due movements and extract them and feed it thru electrodes to the circuit...

the circuit consists of Instrumentation amplifier and filters...

The output i obtained is as follows:
(1). A constant signal whn the eyes are looking straight ahead...
(2). The entire signal shifted up by almost 1V when the eyes moved right (because the right electrodes connecyed to +ve input of amplifier).
(3). The entire signal shifted down by 1V when eyes moved left...

I want to convert these signals to digital.... note that the signal obtained for both movements (right and left) is the same except that is shifted up and down....

how can i achieve digitisation? kindly help....

You've already made plenty of threads about this.

Please don't keep making threads about it, it's confusing and doesn't help us to help you.

Try my old friend google next time trty to help by researching also.
https://en.wikipedia.org/wiki/Analog-to-digital_converter

**broken link removed**

Just pic one and read data sheet well read data sheets then pick one lol
https://www.mouser.com/Search/Refin...eyword=Analog+to+digital&Ntk=Mouser_Wildcards