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ADC32RF45EVM: Setting up ADC32RF45EVM using the documentation

Part Number: ADC32RF45EVM
Other Parts Discussed in Thread: ADC32RF45, , ADS54J40EVM, LMK04828, LMX2582, ADS54J40

I got a TSW14J56 and an ADC32RF45EVM and am currently trying to go through the ADC32RFxx-EVM guide slau620D.pdf found on the TI website. I have a question on section 3.2 step 4. It asks me to connect an analog RF signal to AINP SMA (J2). When I look at the board, the connector J2 is AINM and AINP is actually J1 and it does not have an SMA connector soldered to it. I want to confirm if this a typo ( I am supposed to connect to AINM and not AINP) OR am I supposed to solder an SMA connector to AINP and continue with the test. Please clarify. Even the Fig 1 in the document shows AINP as J1 and AINM as J2.

  • Hi

    Could someone respond to my above question
  • Hi Aravind,

    The analog input for channel A is applied to the SMA connector, J2. It seems as though a typo exists in the User's Guide, but, functionally, should not inhibit the flow of the quick-start procedure.

    Please keep in mind that the "M" and "P" markers would apply if a differential analog input were applied. If you are following the User's Guide, a single-ended signal is applied, so the "M" and "P" do not apply in this circumstance. Please see the analog input schematic below for reference.

    Best Regards,

    Dan

  • Thanks! That was my understanding as well, but wanted to confirm it was a typo.

    On a related note in page 32 of the same document in section 7.2, for the quick start procedure with internal clocking, we are asked to follow the steps listed in section 3.2 with the exception of steps 5 and 6. I believe the step 1 of the section 3.2 which requires us to ensure that the clocking selection jumper to be set to EXT should also NOT be followed and should be set to INT since we are following the steps to use the internal clock. Am I correct in this understanding?
  • Hi Aravind,

    Yes, you are correct. The jumper should be set for "INT" when using onboard cloocking.

    Best Regards,

    Dan
  • Thanks Daniel! 

    I tried to follow the user guide to get the quick start procedure for Bypass LMFS82820 Mode for ADC32RF45 going using the internal clock. I followed section 3.1, skipped 1,5 and 6 in 3.2 and followed the rest of the steps with the changes mentioned in section 8.1 and fig 34 to get the internal clocking set up.  I am doing this in a Win 10 64 bit PC

    I get the following error up front while doing the select ADC step ( section 3.3 step 4) - Screen shot below. I followed all the above steps to the T, so I am not sure why thi might appear. 

    Secondly what I noticed was that in step 11, section 3.2 it is mentioned that after pressing Program EVM, I am supposed to see the device configuration as seen in Fig 4 and Fig 5. While I see that the JESD204B mode page (Fig 5 ) is what I see as well, the Fig 4 in the document is different from what I see in my GUI. See screen shot below

    Thirdly, a couple of times ( did not appear a couple of times)  when I did the step 8 of section 3.3 which asks me to Rest the board, I got the following error message. Screenshot attached

    And Lastly, when I get through the above at times without any hitch I get the following error while pressing the capture button. 

    I am not sure what would be the ideal way to go forward and trouble shoot the set up. I am using two separate 5V, 3A supplies for the two boards. I see that the ADC32RF45EVM board draws about 1.5A initially and then shoots up to 2.5A whereas the TSW14J56 is around 1.5A. 

  • Hi

     I reinstalled the packages HSDC Pro GUI 4.9 and ADC32RF45EVM GUI to see if that would fix the issue. I have done multiple uninstall/reinstall iterations and I get the below error now every time. Note that initially I did not have this error at all. I tried the same in a Win 7 laptop as well and I get the same error. This problem started when I installed an ADS54J40EVM GUI alongwith an ADC32RF45EVM GUI to see if that EVM works. but now both of them show the exact same error message. 

  • Aravind,

    When you select internal clock mode, are you selecting the LMK04828 or LMX2582? In both cases make sure the shunt on jumper JP3 is set between pins 1-2.

    By default, the board is setup to use the LMX with the jumper in this position. If you plan on using the LMK04828, you will have remove C409 and C410 and install C431 and C432. 

    Can you select a lower clock rate and increase the supply to the TSW14J56 to 4A just to make sure this is not a current limit issue?

    Regards,

    Jim 

  • Jim

    I am using the LMX2582 as mentioned in the quick start guide. I did not select the LMK04828 since it requires me to make modifications to the board which I am not ready to do yet. I will try again with a higher current power supply.

    But the issue is I am not able to recreate the issue again since I am now receiving the Labview related error 1097 that I have posted above. Do you have any reasons as to why that might be happening. This started when I installed the ADS54J40EVM GUI in the same laptop. After that I get the error 1097 irrespective of whether I try the ADC32RF45 or ADS54J40. The error is the same in a Windows 7 laptop as well.
  • Jim

    When I use a 5V,5 A supply, with the ADC32RF45EVM at 2949.1M setup, I no longer see the Labview error 1097, but I get the Timed out error. I see LEDS D1,D6 and D7 lit in this case.

    If I reduce the sample rate to 2457.6MSPS, I see the same error, but now I see D1,D6,D7 lit and also D4 blinking.
  • Aravind,

    D6 and D7 on and D8 off on the TSW14J56EVM indicate a DDR failure. I think you will need to have that board replaced. Please contact the distributor you used to order this board and request a replacement one.

    Regards,

    Jim

  • Okay. I feared that after I read through the LED status indicator table.

    Thanks for the confirmation. I will contact the right person and do the needful.
  • Jim

    I got the TSW14J56 board replaced. I ran the quick start procedure given in the ADC32RF45EVM user guide ( slau620D). I used the internal clock instead of the external clock to run the bypass mode LMFS82820 by following section 3 and section 8.1.

    I find that with internal clock and bypass mode selected for each case I get the following 

    Sampling rate

    No of bits

    Mode

    Status

    2949.12M

    12

    82820

    Working

    2949.12M

    14

    8224

    Error

    2457.6M

    12

    82820

    Working

    2457.6M

    14

    8224

    Working

    1536M

    12

    82820

    Error

    1536M

    14

    8224

    Error

    3072M

    12

    82820

    Working

    3072M

    14

    8224

    Error

    In each of the above cases where I have mentioned as error, I get the same error which is as below and in these cases only D8 is lit. Could you help understand why this might occur. For each of the cases, I have started with both the ADC32RF45EVM and TSW14J56EVM powered off and start from ground up. 

  • Hi

    My notifications panel says someone replied 6 hours before, but I do not see any response here. Did anyone reply to the above query?
  • Aravind,

    In each case where you got an error, the sample rate was to high for the ADC. This was causing the serdes rate to be above the max allowed by the JESD204B standard, which is 12.5Gsps.

    Regards,

    Jim 

  • Jim

    From my calculations, the 8224,2949.12M,14 bits mode and the 8224,3072M,14 bits mode both give me a lane rate greater than 12.5Gbps which explains why those modes will be not supported.

    But for the 12 bit,82820,1536M and 14bit,8224,1536M modes the lane rates I get are 5.76Gbps and 7.68Gbps which is well within 12.5Gbps. So I am not sure I understand why it wouldn't work at these rates in these modes. Also without any of these math, if the ADC would work at 3072M, I would expect it to work at half the rate which is 1536M.
  • Jim

    Do you have any thoughts on my above question?  Would be great if you could clarify

  • Aravind,

    What is your current status regarding this post?

    Regards,

    Jim

  • I must say it is still open. I get your explanation of why couple of those modes won't work, but I do not understand why the setup would work at 3072MSPS and not at 1536MSPS as I have mentioned in the reply above.  If it did work at 3072, it should at 1536 too as it is at only half the rate.