8 Bit ADC question

Missed some class notes due to being sick. Anyway have a tutorial question I need some help with. For an 8 bit ADC, how many clock pulses are required for an exact mid-signed
range. I think 4, appreciate if someone can advise.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here. All logos and trade names are the property of their respective owners.