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AD9643 User test mode control

Question asked by nikhil on Feb 28, 2013
Latest reply on Feb 28, 2013 by J.Harris



In AD9643  datasheet the Test mode register 0x0D bits 7 and 6 are defined as Bit 7 = User test mode control 0 = continuous/ repeat pattern 1 = single pattern, then 0s and Bit 6 =Open.

  1. But in the Application note AN877 page 11 it is given that Bits 7 and 6 are used for sequencing the user pattern. So is the same true for this AD9643 also?
  2. In AD9643 there are 4 user test patterns so how the remaining two are selected.
  3. Is it something like two of the user test patterns are for I channel output and the remaining two are for Q channel ?