This region of operation has slightly less accuracy than Normal Case 1 as a result of the common mode operating area in which the part functions, as seen in Figure 6-6. As noted, for this graph V_S = 12 V; for V_CM < 12 V, the Output Error increases as V_CM becomes less than 12 V, with a typical maximum error of 0.005% at the most negative V_CM = –16 V.