Power-down sequence is the reverse order of the previous power-up sequence. VDD and VDDI must be supplied until after VBIAS, VRESET, and VOFFSET are discharged to within 4 V of ground.
During power-down, it is not mandatory to stop
driving VBIAS prior to VOFFSET, but it is a strict
requirement that the delta between VBIAS and VOFFSET must
be within the specified limit shown in Recommended Operating Conditions (Refer to Note 2 for Figure 9-1).