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Error in AD9626 specs?

Category: Datasheet/Specs
Product Number: AD9626
Software Version: N/A

The datasheet specifies an aperture delay of 0.1ns.  For ADCs at 250Msps, this sounds too good to be true.

This is more than a subjective "too-good-to-be-true" perception on my side.  Looking at other ADCs in the same category (Standard High-Speed ADCs), I see:

For similar speeds:

  • AD9683, AD9250, AD9634, AD9642  (all up to 250Msps) — aperture time is 1ns
  • AD9434  (370Msps, 500Msps) — aperture time is 0.85ns

Even some of the faster ones:

  • AD9684, 500Msps — aperture delay close to 0.5ns
  • AD9695, at 1.3Gsps — aperture delay is close to 0.2ns  (at 625Msps, 0.16ns)

Even the AD9213, at 6Gsps or 10.25Gsps, specifies a 0.12ns aperture delay!!

Can you provide confirmation?  What is the aperture delay and aperture jitter for the AD9626?