The 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 4V 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 Recommended Operating Conditions
specified limit.
During power-down, there is no requirement for the relative timing of VRESET with respect to VOFFSET and VBIAS.
Power supply slew rates during power-down are flexible, provided that the transient voltage levels follow the requirements listed previously and in the Power Supply Sequencing Requirements (Power Up and Power Down) graphic.