For each sampled and held analog input signal Sa, the set of references used to vary voltages for writing is Sa ±1/2 LSB, where LSB is {HEAD ~ the difference} between {TAIL ~ two adjacent states} 
between
For each sampled and held analog input signal Sa , the set of references used to vary voltages for writing is Sa ±1/2 LSB , where LSB is { HEAD ~ the difference } between { TAIL ~ two adjacent states }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL