UmTRXv2 final project

Andrey Sviyazov andreysviyaz at gmail.com
Mon Jul 30 12:22:41 UTC 2012


Here project, sch and pcb files.

Best regards,
Andrey Sviyazov.



2012/7/30 Andrey Sviyazov <andreysviyaz at gmail.com>

> Hi Jean-Samuel.
>
> Here are attached last versions of interactive PDF for assembly
> and schema, and BOM (rename zi_ to zip first).
> List of components which are changed:
> L6-1, L6-2 = R0603 0 Ohm instead of choke
> C45-1, C45-2 = Do Not Install
> C82-1, C82-2, C98-1, C98-2 = 100pF instead of 470pF
> C83-1, C83-2, C99-1, C99-2 = 1500pF instead of 8.2nF
> C84-1, C84-2, C97-1, C97-2 = 33pF instead of 150pF
> R106-1, R106-2, R121-1, R121-2 = 2k2 instead of 820 Ohm
> R109-1, R109-2, R119-1, R119-2 = 3k3 instead of 1.2 kOhm
>
> Best regards,
> Andrey Sviyazov.
>
>
>
> 2012/7/25 Andrey Sviyazov <andreysviyaz at gmail.com>
>
>> Hi Jean-Samuel.
>>
>> First of all you're right, we can't delay production.
>> So, I am sure it is better if PCB production will continue as you suggest.
>>
>> There are only three hardware issues which have to be solved before
>> assembling:
>> 1) Improving LMS phase noise.
>> It is almost done and Alexander wrote you which component need to order.
>>
>> 2) Digital noise which born in GPS module 230.
>> In ver.2 we will use GPS module 570, but I am afraid that we can get the
>> same problems.
>> So, I need 1-2 days to workaround this issue.
>> And also we have to understand either it important or it doesn't because
>> this noises  hided under modulation.
>>
>> 3) LMS engineers suggested us to use PLL loop filter 100kHz instead 50kHz.
>> In case of 100kHz we have to decrease charge-pump current from 1.2-1.9mA
>> down to 0.4mA, but I am afraid about integral phase noise of LO because
>> (possible)  it can affect modulation phase error (in degrees).
>> I think, required 1-2 days (the same days) to understand this also.
>>
>> So, at Thirsday I will send you final BOM and assembly files.
>> Hope it doesn't delay production, otherwise tell me and we'll hurry up.
>>
>> Best regards,
>> Andrey Sviyazov.
>>
>>
>>
>> 2012/7/24 Alexander Chemeris <alexander.chemeris at gmail.com>
>>
>>> Hi Jean-Samuel,
>>>
>>> We're sitting together with Andrey Sviyazov now and he says that it's
>>> fine to continue with this PCB.
>>>
>>> You will need 40pcs of this 0 Ohm jumpers (2pcs per board):
>>>
>>> http://fr.farnell.com/bourns/cr0603-j-000elf/resistor-0603-0r-5-0-1w/dp/2008343
>>>
>>> Andrey will update the schematics and BoM later today.
>>>
>>> On Tue, Jul 24, 2012 at 2:13 PM, Jean-Samuel Najnudel - BJT PARTNERS
>>> SARL <jsn at bjtpartners.com> wrote:
>>> > Hi Andrey,
>>> >
>>> > PCB copper is ready yet. We will lose 560 Euros and 3 weeks delay if we
>>> > change the copper. It is not impossible, we can decide to do that but I
>>> > would suggest we change the PCB for the next batch. After testing the
>>> v2
>>> > board, you may found more changes we need on the copper.
>>> >
>>> > The board itself is not ready. We can change some passives. This will
>>> not
>>> > cost anything (or almost) and extra delay will be just one or two days
>>> at
>>> > most.
>>> >
>>> > Please let me know what you want to do about the PCB.
>>> >
>>> > Please let me know the exact passives modifications. I will purchase
>>> the
>>> > components asap and send the modifications list to the fab.
>>> >
>>> > Best regards.
>>> >
>>> > Jean-Samuel.
>>> > :-)
>>> >
>>> > Le 23 juil. 2012 22:47, "Andrey Sviyazov" <andreysviyaz at gmail.com> a
>>> écrit :
>>> >
>>> >> Hi Jean-Samuel.
>>> >>
>>> >> Please let me know fabrication progress, a specially PCB.
>>> >> I ask you because of few changes required to improve LMS phase noises.
>>> >> BOM required changes in passive components only.
>>> >> If PCB doesn't yet ordered, then possible I'll make changes too.
>>> >>
>>> >> Best regards,
>>> >> Andrey Sviyazov.
>>> >> (Sent from my mobile client)
>>> >>
>>> >> 04.07.2012 20:01 пользователь "Jean-Samuel Najnudel - BJT PARTNERS
>>> SARL"
>>> >> <jsn at bjtpartners.com> написал:
>>> >>>
>>> >>> Hi Andrey,
>>> >>>
>>> >>> Thank you very much for your help.
>>> >>>
>>> >>> I will forward this to the fab.
>>> >>> Yes, you are all right, the FBMH2012HM121-T price is much better
>>> than the
>>> >>> MLB-201209-0120PU. However, availability on Farnell France is not as
>>> good as
>>> >>> the MLB-201209-0120PU. Price difference is quite big but we only use
>>> 5 beads
>>> >>> per boards. Difference makes only about 1 euro per board. I will let
>>> the fab
>>> >>> decide between these 2 references.
>>> >>>
>>> >>> Best regards.
>>> >>>
>>> >>> Jean-Samuel.
>>> >>> :-)
>>> >>>
>>> >>>
>>> >>> On Wed, Jul 4, 2012 at 4:30 PM, Andrey Sviyazov <
>>> andreysviyaz at gmail.com>
>>> >>> wrote:
>>> >>>>
>>> >>>> Hi Jean-Samuel.
>>> >>>>
>>> >>>> Yes, you are all right and you can order TDK - MPZ1608S601A instead
>>> of
>>> >>>> MLB-160808-0600PL.
>>> >>>> And also possible to use 3 times cheaper FBMH2012HM121-T, 0805, 2.5A
>>> >>>> instead of MLB-201209-0120PU.
>>> >>>>
>>> >>>> Best regards,
>>> >>>> Andrey Sviyazov.
>>> >>>>
>>> >>>>
>>> >>>>
>>> >>>> 2012/7/4 Jean-Samuel Najnudel - BJT PARTNERS SARL <
>>> jsn at bjtpartners.com>
>>> >>>>>
>>> >>>>> Hi Andrey,
>>> >>>>>
>>> >>>>> Thank you very much for your reply.
>>> >>>>> Now, I better understand.
>>> >>>>>
>>> >>>>> You are all right. I do not have anything as high current as
>>> >>>>> MLB-201209-0120PU at a lower price.
>>> >>>>>
>>> >>>>> However, I have a 0603 600 ohm 1A bead, as MLB-160808-0600PL, at a
>>> much
>>> >>>>> lower price.
>>> >>>>>
>>> >>>>>
>>> http://ru.farnell.com/tdk/mpz1608s601a/ferrite-bead-0603-600-ohm/dp/1669747RL
>>> >>>>> What do you think about this component (TDK MPZ1608S601A)?
>>> >>>>>
>>> >>>>> Best regards.
>>> >>>>>
>>> >>>>> Jean-Samuel.
>>> >>>>> :-)
>>> >>>>>
>>> >>>>>
>>> >>>>>
>>> >>>>> On Wed, Jul 4, 2012 at 3:22 PM, Andrey Sviyazov
>>> >>>>> <andreysviyaz at gmail.com> wrote:
>>> >>>>>>
>>> >>>>>> Hi Jean-Samuel.
>>> >>>>>>
>>> >>>>>> If Farnell better for you, then please order exactly
>>> MLB-201209-0120PU
>>> >>>>>> and  MLB-160808-0600PL.
>>> >>>>>> They are HI_CURRENT beads and it is really required.
>>> >>>>>>
>>> >>>>>> Please find attached here new SCH and BOM files with new part
>>> numbers
>>> >>>>>> and links.
>>> >>>>>>
>>> >>>>>> Best regards,
>>> >>>>>> Andrey Sviyazov.
>>> >>>>>>
>>> >>>>>>
>>> >>>>>>
>>> >>>>>> 2012/7/4 Jean-Samuel Najnudel - BJT PARTNERS SARL
>>> >>>>>> <jsn at bjtpartners.com>
>>> >>>>>>>
>>> >>>>>>> Hi Andrey,
>>> >>>>>>>
>>> >>>>>>> Thank you very much for your reply.
>>> >>>>>>>
>>> >>>>>>> Could you please confirm the components bellow are fine ?
>>> >>>>>>>
>>> >>>>>>>
>>> http://fr.farnell.com/murata/blm18tg601tn1d/ferrite-600ohm/dp/1115050RL
>>> >>>>>>>
>>> >>>>>>>
>>> http://fr.farnell.com/tdk/mmz2012121b/perle-de-ferrite-0805-120-ohm/dp/1669728RL
>>> >>>>>>>
>>> >>>>>>> Please let me know if this is fine.
>>> >>>>>>> If not, which would you suggest ?
>>> >>>>>>> http://ru.farnell.com/ferrite-beads
>>> >>>>>>>
>>> >>>>>>>
>>> >>>>>>> Thanks a lot for your help.
>>> >>>>>>>
>>> >>>>>>> Best regards.
>>> >>>>>>>
>>> >>>>>>> Jean-Samuel.
>>> >>>>>>> :-)
>>> >>>>>>>
>>> >>>>>>>
>>> >>>>>>> On Wed, Jul 4, 2012 at 2:02 PM, Andrey Sviyazov
>>> >>>>>>> <andreysviyaz at gmail.com> wrote:
>>> >>>>>>>>
>>> >>>>>>>> Hi Jean-Samuel.
>>> >>>>>>>>
>>> >>>>>>>> For the TI160808U601 and TI201209U121 you can use any high
>>> current
>>> >>>>>>>> ferrite chip bead with 600 Ohm and 120 Ohm impedance
>>> respectively.
>>> >>>>>>>> For example you could order similar partnumbers from the ELFA
>>> >>>>>>>> catalogue in the 0603 and 0805 SMD cases respectively,
>>> datasheet here pdf.
>>> >>>>>>>>
>>> >>>>>>>> Best regards,
>>> >>>>>>>> Andrey Sviyazov.
>>> >>>>>>>>
>>> >>>>>>>>
>>> >>>>>>>>
>>> >>>>>>>> 2012/7/4 Jean-Samuel Najnudel - BJT PARTNERS SARL
>>> >>>>>>>> <jsn at bjtpartners.com>
>>> >>>>>>>>>
>>> >>>>>>>>> Hi Andrey,
>>> >>>>>>>>>
>>> >>>>>>>>> Thank you very much for your reply.
>>> >>>>>>>>>
>>> >>>>>>>>> I try to find where to buy the TI160808U601 and TI201209-121
>>> >>>>>>>>> chokes. I do not know where I should find these. Would you
>>> know where I
>>> >>>>>>>>> should order these components ?
>>> >>>>>>>>>
>>> >>>>>>>>> By the way, do you confirm the ISSI SRAM is pin compatible
>>> with the
>>> >>>>>>>>> Cypress chip ?
>>> >>>>>>>>>
>>> >>>>>>>>>
>>> http://www.digikey.com/product-detail/en/IS61NLP51236-200TQLI/706-1103-ND/1557418
>>> >>>>>>>>>
>>> >>>>>>>>> Is this ISSI chip fine for our application ? Is 18 MBit enough
>>> ?
>>> >>>>>>>>> Do you confirm this ISSI chip is the best value for what we
>>> need ?
>>> >>>>>>>>> Are you sure we cannot find a lower cost chip with similar
>>> performances
>>> >>>>>>>>> and/or a better performances chip with similar cost ?
>>> >>>>>>>>> Are you sure we will not need to reroute the PCB ?
>>> >>>>>>>>>
>>> >>>>>>>>> We really need to be sure before starting the PCB production.
>>> If
>>> >>>>>>>>> both you and Alexander confirm everything is fine, I will ask
>>> the fab to
>>> >>>>>>>>> start the PCB.
>>> >>>>>>>>>
>>> >>>>>>>>> Please let me know.
>>> >>>>>>>>>
>>> >>>>>>>>> Again, thanks a lot for your help.
>>> >>>>>>>>>
>>> >>>>>>>>> Best regards.
>>> >>>>>>>>>
>>> >>>>>>>>> Jean-Samuel.
>>> >>>>>>>>> :-)
>>> >>>>>>>>>
>>> >>>>>>>>>
>>> >>>>>>>>>
>>> >>>>>>>>> On Tue, Jul 3, 2012 at 11:40 PM, Andrey Sviyazov
>>> >>>>>>>>> <andreysviyaz at gmail.com> wrote:
>>> >>>>>>>>>>
>>> >>>>>>>>>> Jean-Samuel.
>>> >>>>>>>>>>
>>> >>>>>>>>>> Please inform me what actually rf chockes partnumbers are
>>> problem
>>> >>>>>>>>>> to order.
>>> >>>>>>>>>> Unfortunately MuRata produce few billion pcs and then stopped
>>> for
>>> >>>>>>>>>> a few years.
>>> >>>>>>>>>> So, possible we have to find some Chinese fab partnumbers to
>>> >>>>>>>>>> order.
>>> >>>>>>>>>>
>>> >>>>>>>>>> Best regards,
>>> >>>>>>>>>> Andrey Sviyazov.
>>> >>>>>>>>>> (Sent from my mobile client)
>>> >>>>>>>>>>
>>> >>>>>>>>>> 04.07.2012 1:22 пользователь "Andrey Sviyazov"
>>> >>>>>>>>>> <andreysviyaz at gmail.com> написал:
>>> >>>>>>>>>>
>>> >>>>>>>>>>> Hi Jean-Samuel.
>>> >>>>>>>>>>> Unfortunately I have no internet connection now.
>>> >>>>>>>>>>> Tomorrow I'll check flash and others.
>>> >>>>>>>>>>>
>>> >>>>>>>>>>> Best regards,
>>> >>>>>>>>>>> Andrey Sviyazov.
>>> >>>>>>>>>>> (Sent from my mobile client)
>>> >>>>>>>>>>>
>>> >>>>>>>>>>> 04.07.2012 1:10 пользователь "Alexander Chemeris"
>>> >>>>>>>>>>> <alexander.chemeris at gmail.com> написал:
>>> >>>>>>>>>>> >
>>> >>>>>>>>>>> > On Mon, Jul 2, 2012 at 10:16 PM, Jean-Samuel Najnudel - BJT
>>> >>>>>>>>>>> > PARTNERS
>>> >>>>>>>>>>> > SARL <jsn at bjtpartners.com> wrote:
>>> >>>>>>>>>>> > > 1/ Would you know a distributor for the Murata chokes ?
>>> The
>>> >>>>>>>>>>> > > fab them to have
>>> >>>>>>>>>>> > > some issue to source these.
>>> >>>>>>>>>>> >
>>> >>>>>>>>>>> > Andrey is looking into this.
>>> >>>>>>>>>>> >
>>> >>>>>>>>>>> > > 2/ Would you suggest a distributor for the GPS chip ?
>>> >>>>>>>>>>> >
>>> >>>>>>>>>>> > Try contacting manufacturer directly:
>>> >>>>>>>>>>> >
>>> >>>>>>>>>>> >
>>> http://www.transystem.com.tw/product.php?b=g&m=pe&cid=4&sid=&id=66
>>> >>>>>>>>>>> >
>>> >>>>>>>>>>> > They have a distributor in UK, but I think it might be
>>> easier
>>> >>>>>>>>>>> > to buy
>>> >>>>>>>>>>> > from the manufacturer directly:
>>> >>>>>>>>>>> > http://www.castlemicrowave.com/castle-contact.asp
>>> >>>>>>>>>>> >
>>> >>>>>>>>>>> > This chip is popular in Russia, so it is easy to source
>>> them
>>> >>>>>>>>>>> > here,
>>> >>>>>>>>>>> > shipping them to EU might be a pain in big batches, but I
>>> think
>>> >>>>>>>>>>> > we
>>> >>>>>>>>>>> > could send few chips for this prototyping batch if
>>> >>>>>>>>>>> > manufacturer's lead
>>> >>>>>>>>>>> > time is too long. Here it costs $14.50/chip for more then
>>> 16
>>> >>>>>>>>>>> > chips:
>>> >>>>>>>>>>> > http://www.compel.ru/infosheet/TSI/EB-570/
>>> >>>>>>>>>>> >
>>> >>>>>>>>>>> > --
>>> >>>>>>>>>>> > Regards,
>>> >>>>>>>>>>> > Alexander Chemeris.
>>> >>>>>>>>>>> > CEO, Fairwaves LLC / ООО УмРадио
>>> >>>>>>>>>>> > http://fairwaves.ru
>>> >>>>>>>>>
>>> >>>>>>>>>
>>> >>>>>>>>
>>> >>>>>>>
>>> >>>>>>
>>> >>>>>
>>> >>>>
>>> >>>
>>> >
>>>
>>>
>>>
>>> --
>>> Regards,
>>> Alexander Chemeris.
>>> CEO, Fairwaves LLC / ООО УмРадио
>>> http://fairwaves.ru
>>>
>>
>>
>
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