Author Topic: what happened to LTZ1000 stocks?  (Read 10248 times)

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Offline zhtoor

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Re: what happened to LTZ1000 stocks?
« Reply #50 on: November 18, 2017, 06:34:22 pm »
RTFM

hello andreas,

your observation is very correct:-

TNFM (There is No ****ing Manual with respect to noise testing of LTZ1000)  |O

best regards.
 

Offline MisterDiodes

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Re: what happened to LTZ1000 stocks?
« Reply #51 on: November 18, 2017, 09:52:37 pm »
...Except the datasheet does clearly states a 2uV p-p max noise, does it not?  Which is what Andreas' part is doing, and I would say is operating properly - at least from the graph shown.  The datasheet doesn't distinguish the "type" of noise, but you do get a boundary limit.  That 2uV p-p limit is still <0.3ppm p-p on a 7.15V scale, and difficult to measure accurately especially as a real -absolute- value change. 

That noise level is also in the realm of contributing binding post thermals, air drafts, EMI and lots of other causes outside the LTZ can.

DigilentMinds was referring to something I think operating farther -outside the bounds- of the datasheet limits, and that's something that piqued my interest.  From what I've seen that doesn't happen often with LTZ's (on proper PCB, proper draft protection, noise shielding, etc.), and I was curious about the date codes of those parts involved, if known.
« Last Edit: November 19, 2017, 11:43:56 am by MisterDiodes »
 

Offline bopcph

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Re: what happened to LTZ1000 stocks?
« Reply #52 on: November 21, 2017, 03:57:22 am »
That 2uV p-p limit is still <0.3ppm p-p on a 7.15V scale,

I'm glad I don't have an 8½ digit DMM - even a LTZ1000 inside spec's ain't good enough to calibrate it  |O

Thats a joke of cause  ;)
But you actually have to do better than 0.01 ppm to get uncertainties less than one LSD on an 8½ digit  :-//
« Last Edit: November 21, 2017, 03:59:07 am by bopcph »
 

Offline zhtoor

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Re: what happened to LTZ1000 stocks?
« Reply #53 on: December 04, 2017, 10:57:43 pm »
hello,

did anybody get LTZ1000's from linear, has the production line started ("ramped up") after material change?

regards.

-zia
 

Offline MisterDiodes

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Re: what happened to LTZ1000 stocks?
« Reply #54 on: December 04, 2017, 11:37:51 pm »
Yes. At least we have a shipment on the way according to FedEx, due here 12/6.
« Last Edit: December 05, 2017, 12:03:01 am by MisterDiodes »
 

Offline chuckb

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Re: what happened to LTZ1000 stocks?
« Reply #55 on: December 05, 2017, 01:27:16 am »
I got my backordered Digikey parts on Saturday. Date code 1744.
 
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Offline mimmus78

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Re: what happened to LTZ1000 stocks?
« Reply #56 on: December 05, 2017, 01:41:40 am »
Ohh!!! I should have accepted exchange of a 732A for a LTZ1000A the week ago ...
 

Online beanflying

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Re: what happened to LTZ1000 stocks?
« Reply #57 on: December 05, 2017, 12:08:56 pm »
I got my backordered Digikey parts on Saturday. Date code 1744.

How long ago did you order them? Seems the couple I ordered early last week were not shipped from that lot  :(

Current backorder time from Digikey is at Feb next year.........
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Offline chuckb

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Re: what happened to LTZ1000 stocks?
« Reply #58 on: December 05, 2017, 12:56:48 pm »
I got my backordered Digikey parts on Saturday. Date code 1744.

How long ago did you order them? Seems the couple I ordered early last week were not shipped from that lot  :(

Current backorder time from Digikey is at Feb next year.........

I ordered these 3 months ago.
 
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Offline MisterDiodes

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Re: what happened to LTZ1000 stocks?
« Reply #59 on: December 06, 2017, 05:49:37 am »
I got my backordered Digikey parts on Saturday. Date code 1744.

Current backorder time from Digikey is at Feb next year.........

That's good - that DK lead time was listed April 2018 as of a few weeks ago.   So it seems like they've shaved a couple months off the backlog.

LT says they should be able to catch up on Vref orders in Dec / Jan.

We have seen delays like this before.  A lot depends on how many devices they ship out to the big players - LT has no real economic reason to sell LTZ's in onsie-twosie quantities but it's good that they do.
 
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Online beanflying

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Re: what happened to LTZ1000 stocks?
« Reply #60 on: December 06, 2017, 10:12:32 am »
Will have to make do with the LM399's that arrived today as temporary playthings :) Waiting on a stash of Vishay's from Texas Components for the LTZ's and another couple of projects too.
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Offline floobydust

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Re: what happened to LTZ1000 stocks?
« Reply #61 on: December 06, 2017, 04:19:47 pm »
I got my backordered Digikey parts on Saturday. Date code 1744.
chuckb, any chance you can note country of origin on the paperwork for those parts.
 

Online beanflying

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Re: what happened to LTZ1000 stocks?
« Reply #62 on: December 06, 2017, 04:49:54 pm »
Tried to 'order' 100 from Digikey ::)

Seems like order now you get Early Feb and ongoing looks ok at this stage.

4   2/10/2018
40   2/10/2018
56   2/15/2018
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Offline MisterDiodes

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Re: what happened to LTZ1000 stocks?
« Reply #63 on: December 07, 2017, 10:58:11 am »
Just checked our LTZ1000A order (order direct at LT) rec'd 12/6.  Date code week 45 of 2017, diffused Milpitas CA, USA, assembled Malaysia, tested Milpitas.

Every device 100% tested at LT Milpitas, CA USA, shipped from Milpitas and every device is guaranteed to meet datasheet specs, as signed off by LT.  Certificate in the shipping package.

Everything is correct and exactly as expected.
 

Online beanflying

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Re: what happened to LTZ1000 stocks?
« Reply #64 on: December 07, 2017, 11:01:42 am »
I looked at buying these and a few other bits from LT direct but $90USD export freight is crazy money.
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Offline chuckb

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Re: what happened to LTZ1000 stocks?
« Reply #65 on: December 08, 2017, 08:56:59 am »
I ordered some LTZ1000As directly from Linear Tech on July 11, 2017. They arrived today. Date code 1744.
Country of Origin, Malaysia.
 
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Offline mimmus78

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Re: what happened to LTZ1000 stocks?
« Reply #66 on: December 20, 2017, 10:24:39 pm »
I ordered some LTZ1000A from Digikey ... shipping 27/12
 

Offline d-smes

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Re: what happened to LTZ1000 stocks?
« Reply #67 on: December 20, 2017, 10:56:35 pm »
I ordered some LTZ1000A from Digikey ... shipping 27/12
When did you order them?  For me just now, DigiKey shows zero stock and 12 week standard leadtime.  But when you try to order one, they show an "estimated" ship date of 2/15/2018...
 

Offline mimmus78

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Re: what happened to LTZ1000 stocks?
« Reply #68 on: December 20, 2017, 11:02:36 pm »
I ordered some LTZ1000A from Digikey ... shipping 27/12
When did you order them?  For me just now, DigiKey shows zero stock and 12 week standard leadtime.  But when you try to order one, they show an "estimated" ship date of 2/15/2018...
Now, just ordered. They changed date from 27 to 28 after the payment ... maybe I got the last two of this batch.
Hope it's not an error.

« Last Edit: December 20, 2017, 11:04:41 pm by mimmus78 »
 

Offline mimmus78

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Re: what happened to LTZ1000 stocks?
« Reply #69 on: December 20, 2017, 11:07:45 pm »
And if I try to reoder it's Feb/15/2018 ..
 

Offline The Soulman

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Re: what happened to LTZ1000 stocks?
« Reply #70 on: December 20, 2017, 11:34:26 pm »
Arrow shows 9 non-A in stock:
https://www.arrow.com/en/products/ltz1000chpbf/linear-technology



Edit: emphasized "in-stock".
« Last Edit: December 21, 2017, 09:58:04 am by The Soulman »
 

Online TheSteve

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Re: what happened to LTZ1000 stocks?
« Reply #71 on: December 21, 2017, 09:19:31 am »
Of course MOUSER is also selling this part: (Free stock on 05-FEB-18)

https://www.mouser.be/Search/Refine.aspx?Keyword=LTZ1000A

Hah, there automated systems must have noticed the extended backorder time, figured there was huge demand and decided they needed it as a product.
VE7FM
 

Offline cellularmitosis

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Re: what happened to LTZ1000 stocks?
« Reply #72 on: December 29, 2017, 07:21:50 am »
Looks like the Digikey Dec. 27th re-stock date slipped.    :P
LTZs: KX FX MX CX PX Frank A9 QX
 

Offline mimmus78

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Re: what happened to LTZ1000 stocks?
« Reply #73 on: December 29, 2017, 09:51:20 am »
Looks like the Digikey Dec. 27th re-stock date slipped.    :P

Yes I know :-) Mine were scheduled for today but not shipped too ...
I tried to contact them by chat but the site keep going in error 404 :palm:
I'll check again tomorrow.
 

Offline hwj-d

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Re: what happened to LTZ1000 stocks?
« Reply #74 on: December 29, 2017, 12:07:27 pm »
I ordered one A-type from hifi just to test it, but first need additional components too. Got it today.
Has anyone already had experience with these?
« Last Edit: December 29, 2017, 12:09:04 pm by hwj-d »
 


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