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TI BLE sensor tag design files

Srinath Vaddepally1
Expert 1020 points
Other Parts Discussed in Thread: CC2541SENSORTAG-RD, CC2541

Hi,

I am done with my proof of concept on TI sensor tag. NOw I want to customize the board design with the help from TI sensor tag design reference files which are available at http://www.ti.com/tool/cc2541sensortag-rd

Can some body comment on how to open these files in Eagle CAD. I am not able to open them as it is .

Thank you for your comments

  • 0
    TI__Guru 56590 points

    Hello Srinath,

    The current reference design for the sensorTag is made in Cadstar. You can download the free express version to view the design file, but the free version is limited to 50 components.

    http://www.zuken.com/en/products/pcb-design/cadstar/resources/express

    I do not know what the best way for converting it to Eagle PCB editor, but by opening it in Cadstar you can at least get a better view of the different dimensions. If you end up at less than 50 components i think you will be able to modify the design as well. 

  • 0 in reply to Eirik V
    Expert 1020 points

    Thanks Eirik for your quick response.

    Also I notice that sensor tag design reference files are not complete. When I tried opening the .pcb file in CADSTAR express, the viewer doesn't show all the on board components. Can you confirm if you have all the design files in the zip folder.

    When I open the CC2541 key fob design file (from  CC2541 mini development kit), I could able to open without any issues. Only sensor tag design file is incomplete. 

    Can you comment on this.

    Thank you

  • 0 in reply to Srinath Vaddepally1
    TI__Guru 56590 points

    Hello Srinath,

    Maybe it is the same problem as in the following thread:

    http://e2e.ti.com/support/low_power_rf/f/155/p/320966/1123888.aspx#1123888

    Let me know if that works out.

  • 0 in reply to Eirik V
    Expert 1020 points

    Eirik,

    Thank you very much for your response. Also I have couple more queries in regards to parts name convention.

    Spec says capacitor values something like C_12P_0402_NP0_J_50  ...

    I see it could be something like  12pF value , 0402 package type.

     
    But what does  NP0 ( not populate ? ) J_50 mean ?
    Can you also comment on  
    C2U2_402_X5R_M_6P3VDC ,
    L_1N0_0402_S
    R_56K_0402_F mean ?
    I am confused with letters like S (as in Inductor), F (as in Resistor).
    Appreciate your time in resopnding to this email.
    Thanks.
  • 0 in reply to Srinath Vaddepally1
    TI__Genius 9705 points

    Srinath, 

    The part names in the BOM contain description of important specs on the components.

    Example: C_2U2_0402_X5R_M_6P3VDC  stands for capacitor_value 2.2uF_Size 0402_Temperature Characteristic X5R (as defined by the manufacturer)_Tolerance 20%(M)_Rated Voltage 6.3V. This is manufactured by Murata and you can find detailed explanation on Murata datasheet for the part. 

    Similarly, "F" in  "R_56K_0402_F" stands for tolerance of 1% and NP0/C0G specifies temperature characteristic.

    The BOM contains manufacturer and part number for each component. Please refer to the datasheet from the component manufacturer for further clarification. 

    Regards,
    SS

  • 0 in reply to SVS
    Expert 1020 points

    SriVidya,

    Thank you very much for your quick response. I looked in to the spead sheet and most of the component values are self explanator as you noted. I have few more, which I couldn't figure out from BOM.xls. 

    What does 

    R_0402
    L_0402

    mean ? I know they are resistors and inductors. But there is no part description nor component value.

    Can you please comment on this as well. Appreciate your response.

    Thanks

  • 0 in reply to Srinath Vaddepally1
    TI__Genius 9705 points

    Srinath, 

    For components that are not mounted on the PCB by default or where component from any manufacturer can be used as long as the value is retained, only the type ("R" for resistor) and footprint (0402/0603 etc) is specified. If the value is not specified, they are just place holders. They can be populated if needed with any component with matching footprint as needed to address problems, if any. 

    Regards,
    SS

  • 0 in reply to SVS
    Expert 1020 points

    SriVidya,


    Thank you for quick comments. Just to confirm that BOM specifies as mentioned below

    L243 DNM L_0402
    R2;R5;R7-9;R11;R13 DNM R_0402

    What does DNM mean ? Do NOT populate ?

    Please comment.

    Thanks,

    Srinath

  • 0 in reply to SVS
    Expert 1020 points

    Hi,

    I am done with my proof of concept using BLE sensor tag.

    Instead of using CADSTAR, I used EAGLE for my PCB development( as my component list exceeded 50).

    I found all the components except for below coin cell holder. The specifications are mentioned as mentioned in sensor tag BOM file

    Part Name BC2002
    Description : Keystone button cell holder
    Manufacturer : Comfortable
     Electronic Co Ltd
    I couldn't find the eagle .lbr file or equivalent .bxl file for above component. Is there any equivalient component I can replace or can some body provide .lbr / .bxl file for above component.
    Appreciate your comments on this.
    Thank you,
    Srinath

  • 0 in reply to Srinath Vaddepally1
    Expert 1020 points

    Hi,


    Can some body comment on my query ? Thank you so much for your comments.

    Thanks

  • 0 in reply to Srinath Vaddepally1
    TI__Guru 56590 points

    Hello Srinath,

    Try to create a new thread with this single topic or add the part to your library yourselves. When we used Cadstar we usually create the footprint based on data sheets ourselves. I think it should be possible with EAGLE.

  • 0 in reply to Srinath Vaddepally1
    Prodigy 55 points

    Hello Srinath,

    I would also like to do a custom design of the SensorTag PCB.
    How did you manage to do that? Did you design the PCB from scratch in Eagle?

    Would it be asked to much if you could send me the Eagle PCB file?

    Regards,

    Michael

  • 0 in reply to MCO
    Expert 1020 points

    Dear Michael,

    Yes, we did customized  our PCB. Can we take this offline ?

    Thanks,

    Srinath

  • 0 in reply to Srinath Vaddepally1
    Prodigy 140 points

    Michael and Srinath,

    I'm a student working on a research project and would also like to be able to modify the SensorTag PCB in EAGLE. I would really appreciate any assistance. Thanks!

  • 0
    Prodigy 20 points
    Dear fellows

    I know it's now a long time ago but I have the same problems in 2017 as you had ;)

    I'm a student who want to customize the board design for a project. The reference files are now built in Cadence Allegro (which costs about 25'000$).
    Not really open source.

    So could I ask you for the Eagle PCB files?

    I would really appreciate if you can dig out these files somewhere.

    Best regards

    Lars