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AD9371 supply sequencing - page 56 of D/Sheet

Question asked by natural_inquisitive Employee on Aug 8, 2018
Latest reply on Aug 10, 2018 by Vinod

As per page 56 of the datasheet pasted below, if not sequenced ideally,

 

  1. Are the undesired power currents damaging to the device? What sort of level are they likely to be?
  2. What are the consequence of an error in sequencing?
  3. Are the same consequences likely on erroneous power-down sequence (in case of fault on a rail etc)?

 

We can use PG's and Track pins on DC-DC but would like to understand the consequences. If the undesired power currents flow for a while are there thermal implications? Parasitic diode between rail failures possible etc?

 

Also - if used in RX mode only, what are the needs for the 1V8 supplies on VDDA_IF and VDDA_1P8.

It looks like VDDA_1P8 is not needed if there is no TX used?

 

PAGE 56 SECTION

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