AD9361 design questions

We've got a couple of AD9361 PCB design questions that I figured would be best to bundle into a single post.

1) What is the maximum TX and RX data trace slack, assuming the maximum sample rate of 61.44Msps? In other words, what is the maximum length/TOF delay between A_P1_D0, A_P1_D1, A_P1_D2, etc...

2) What is the recommended bypass capacitor configuration? Right now we're using the ADP1755 with a configuration of ferrite -> 0.1uF -> small power plane (to minimize parasitic inductance) for all 1.3V digital and analog supplies. Does adding a 10uF capacitor or doing 0.1uF -> ferrite -> 0.1uF -> power plane significantly improve the 9361's performance?

3) What is the nominal peak-to-peak voltage for the SYNC_IN signal? We couldn't much information on this in the wiki or datasheet.

Thanks!

Parents
  • Thanks, Vinod. A couple of follow-ups:

    1) We saw table 49 - it's helpful for determining clock-data requirements, but not data-data. Our current design has 10mm of TOF delay between two of the P0 bus pins, for example. Is within acceptable timing parameters for the AD9361, CMOS mode?

    2) The evaluation board uses 0201 capacitors, if I am not mistaken - we're trying to avoid 0201 components to  minimize manufacturing cost, hence our current design.

    3) We saw that section but did not find any information on p2p voltage. I assumed it should be equal to 1.3V but wanted to make sure.

Reply
  • Thanks, Vinod. A couple of follow-ups:

    1) We saw table 49 - it's helpful for determining clock-data requirements, but not data-data. Our current design has 10mm of TOF delay between two of the P0 bus pins, for example. Is within acceptable timing parameters for the AD9361, CMOS mode?

    2) The evaluation board uses 0201 capacitors, if I am not mistaken - we're trying to avoid 0201 components to  minimize manufacturing cost, hence our current design.

    3) We saw that section but did not find any information on p2p voltage. I assumed it should be equal to 1.3V but wanted to make sure.

Children
No Data