AD9375 Power Sequence

VDIG must come up first.

From UG:

The AD9371 requires a specific power-up sequence to avoid
undesired power-up currents. The optimal power-on sequence
starts the process by powering up the VDIG and the VDDA_1P3
(analog) supplies simultaneously. If they cannot power up simultaneously, the VDIG supply must power up first. The VDDA_3P3, VDDA_1P8, and JESD_VTT_DES supplies
must then power up after the VDIG and VDDA_1P3 supplies.
Note that the VDD_IF supply can power up at any time. It is
also recommended to toggle the RESET signal after power has
stabilized prior to configuration. Follow the reverse order of the power-up sequence to power-down.

Refer to the below link:

https://ez.analog.com/wide-band-rf-transceivers/design-support-ad9371/f/q-a/100284/ad9371-supply-sequencing---page-56-of-d-sheet/298098#298098 

Hi srimoyi,

Thanks for the reply.

Can I have the below Power Up Sequence:

VDIG_1P3 -> VDDA_1P3 -> VDD_IF_1V8 -> VDDA_3P3 ->  VDDA_1P8, 

JESD_VTT_DES supplies is combined with VDDA_1P3

With the above sequence, I would like to know

1. Can VDD_IF come up anytime after VDIG_1P3 & VDDA_1P3

2. Is there any sequence between VDDA_3P3 AND VDDA_1P8 ? Can VDDA_1P8 come up before VDDA_3P3 ?

Sagar_BN said:

Can VDD_IF come up anytime after VDIG_1P3 & VDDA_1P3

Yes it can power up a anytime after VDIG_1P3 & VDDA_1P3 .. You can follow the details in UG.

Make sure that the peak power up current requirements are met with the sequence that you follow.