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unknown numbers schematic ADAU1442 evalboard

Hey,

I want to start designing my PCB for the DSP  soon. I tried to understand whats happening around the DSP on my ADAU  1442 EvalBoard.

I found some numbers in brackets in the schematic that confuse me. You can see it at the picture "numbers". It comes from the userguide for the ADAU1442 EvalBoard (UG-032).

Can anyone help me.

Thanks,

Christian

attachments.zip
  • I was pulled into several high-priority, time-critical projects at work  over the past few weeks and unfortunately I had to de-prioritize my  participation in the forum as a result. So, I apologize for making you  wait so long for an answer. I am going to try to respond to everybody's questions within the next few days.

    These numbers are leftover from the original schematic document, which was a single PDF file. The numbers in brackets refer to page numbers that the signal also appears on. For example, in the picture you attached, the SDATA_OUT signals have a [3,5] next to them. This means that they appear on pages 3 and 5 in that document. In the UG-032, these page numbers don't apply anymore, but the references stayed in because the graphics were copied directly from the original.

    I have attached a PDF of the latest board revision for your reference.

  • I noticed that on the UG-32 and also the orig schematics that L15 is not labeled, and in UG-32 it is also not included on the BOM sheet; could you let me know what it is exactly or post an updated BOM?

    Thanks!

    -Andrew

  • echoskope wrote:

    I noticed that on the UG-32 and also the orig schematics that L15 is not labeled, and in UG-32 it is also not included on the BOM sheet; could you let me know what it is exactly or post an updated BOM?

    That is a standard ferrite bead. Here are the specs on the one we typically use, although I'm sure there are countless drop-in replacements.

    Ferrite Bead 600 Ohm @ 100 MHz

    Footprint: 0402

    Height: 0.55 mm

    Manufacturer: TDK Corp

    Current rating: 300 mA

    Vendor: Digi-Key

    Vendor order number: 445-2162-1-ND

  • This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

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    EZ Admin