ADS7887: Screening and test flow for the ADS7887SDBVT and V62/08618-01XE parts

Hi Neil,

The process flow for the ADS7887 does not have all of the hooks in place to qualify as AEC-Q100.  I do not have specific detail for the V62/08618-01XE device, so I'll redirect your query to the supporting team.

Thank you Tom,

I understand that both the ADS7887 and V62/08618 parts won't perfectly match the AEC-Q100. I'm just looking for the test flows so that I can see how closely it matches. The testing that is done by TI by default will determine the level of up-screening that we will need to perform on these parts at an outside test house so it would be very helpful to know what tests the part already sees when compared to those AEC specs.

Hi Neil,

Neil Gagne said:

V62/08618-01XE Op-Amp

I did some search in mouser.com and it seems that the part is referenced to OPA340-EP product. Please let me know if this makes sense. EP refers to Enhanced Product, which is typically used in aerospace, defense or medical products, see the link below.  

https://www.ti.com/lit/sg/sgzt005c/sgzt005c.pdf?ts=1699989189241&ref_url=https%253A%252F%252Fwww.ti.com%252Fsitesearch%252Fen-us%252Fdocs%252Funiversalsearch.tsp%253FlangPref%253Den-US%2526searchTerm%253Denhanced%2Bproduct%2526nr%253D67195

https://www.ti.com/lit/ds/symlink/opa340-ep.pdf?HQS=dis-mous-null-mousermode-dsf-pf-null-wwe&ts=1699986116639&ref_url=https%253A%252F%252Fwww.mouser.com%252F

https://www.mouser.com/ProductDetail/Texas-Instruments/V62-08618-01XE?qs=XGzIaZb%2FFYKkNuvzxEtF2w%3D%3D

You mentioned AEC-Q100 level, which is automotive grade op amps. Here is the automotive selection link. We do not have OPA340 automotive grade op amp, but we have many equivalent ones, such as OPA376-Q1, OPA377-Q1, OPA320-Q1, TLV197-Q1 (36V), OPA197-Q1(36V), OPA192-Q1(36V) and many others. 

https://www.ti.com/amplifier-circuit/op-amps/precision/products.html#1498=Automotive&

For automotive application, pricing may be very sensitive. Please let me know the price range that customer has defined, and I will find the equivalent one as the replacement. 

If you have other questions, please let me know. 

Best,

Raymond

Hi Raymond,

Thank you for the information but I am not currently looking for any alternate parts. We currently have the ADS7887SDBVT analog to digital converter and the V62/08618-01XE Op-Amp in our design. The V62 part is a part of that OPA340-EP family that you had mentioned. I'm not looking to switch out either of these parts. I'm just looking to see what screening tests are performed on those part numbers, or what qualification tests are performed on the family. When the parts are made I would expect they would go through basic electrical tests at a minimum to confirm they work. Other common screening tests would be visual inspection, burn-in testing, temperature cycling, etc.

I'm just looking for the test flow for these parts to see what they go through by default. This kind of information is usually in the data sheets, but TI datasheets don't include the test information.

I think I may have found part of what I was looking for from that OPA340-EP link

For the V62/08618-01XE I found this reliability report by looking in the OPA340-EP product page https://www.ti.com/product/OPA340-EP?keyMatch=V62/08618-01XE&tisearch=search-everything&usecase=OPN#tech-docs

Could you confirm that this is also applicable to the V62/08618-01XE part since they are in the same family. Or is this report only applicable to that OPA340-EP part type https://www.ti.com/lit/pdf/sbok014

For the ADS7887SDBVT do you know if a similar reliability report is available? On the product page for this it doesn't seem to have the same reliability report that was available for the V62 part. 

https://www.ti.com/product/ADS7887?keyMatch=ADS7887&tisearch=search-everything&usecase=GPN-ALT#tech-docs

Thank you,

-Neil Gagne

Hi Neil, 

From the Enhanced Production Selection Guide, the following tests are conducted for the -EP products. 

Neil Gagne said:

Could you confirm that this is also applicable to the V62/08618-01XE part since they are in the same family. Or is this report only applicable to that OPA340-EP part type https://www.ti.com/lit/pdf/sbok014

In the following document, you probably already see from the Reliability Report. These are typical -EP related report. Unlike the aerospace product, each product is tested individually depending on the product's delivery requirements. In semiconductor industry, the product test specification and performance data are presented as typical in a given lot or sample sizes. Since these semiconductor process is repeatable, thus the typical performance or specification tested figures represent one standard deviation of the product and process. We do not test each product individually per the -EP requirements. 

Neil Gagne said:

I'm just looking for the test flow for these parts to see what they go through by default.

If you are looking for specific performance figures or report in OPA340-EP from a manufacturing site, this will be difficult to obtain in practice. If you read OPA340-EP's datasheet, you will see that the performance data is specified from -55C to +125C. For standard OPA340 or non-EP op amp, the similar performance data is only tested and verified at +25C or room temperature. The performance figures in the published data are guaranteed per the product requirements. In the -EP product family, all published data are meeting the specified aerospace and defense product requirements (or standard), which are presented in the Products Reliability Report.  

If your application requires specific test performance figures and reports on group of OPA340-EP products, you have to performance these tests on your own or via 3rd party who offers such services. I do not believe that TI is offering such services to screen any products at this level. 

Per your question "what they go through by default", the default parameters and performance distribution results are presented in the OPA340-EP's datasheet. The OPA340-EP published figures are typical (one standard deviation) + mins and maxs ranges of these measurements from -55C to +125C. On the users' end, the received OPA340-EP parts should fall within the min and max ranges per the datasheet specification from -55C to +125C.

The OPA340 non-EP product is only guaranteed the performance at 25C; In practice, the OPA340 product's test time on the product line is lower than OPA340-EP product.   

Neil Gagne said:

On the product page for this it doesn't seem to have the same reliability report that was available for the V62 part. 

 ADS7887SDBVT is not specified as -EP product currently, thus the relevant test data will not be available. If you want the thermal and/or radiation related test report etc., you have to look for one of the following ADC in the -EP selection product page, see the captured image and the link below.  

https://www.ti.com/lit/sg/sgzt005c/sgzt005c.pdf?ts=1699989189241&ref_url=https%253A%252F%252Fwww.ti.com%252Fsitesearch%252Fen-us%252Fdocs%252Funiversalsearch.tsp%253FlangPref%253Den-US%2526searchTerm%253Denhanced%2Bproduct%2526nr%253D67195

If you have other questions, please let us know. 

Best,

Raymond

Hi Raymond,

Apologies if i'm not being clear enough on what I am looking for. I don't need specific values for the tests that are performed on this part, i'm just looking for a blank test traveler, test flow, or a list of tests performed so that I know what TI does to these parts to ensure their reliability.

We are already performing a variety of upscreening tests on these devices at a third party test house. But if TI already performs some of those tests then I can skip them at the third party house. I know that TI has to do some testing on all products, at an absolute minimum I would expect that the parts are tested electrically to confirm that they meet datasheet requirements. I would also anticipate there would be a visual inspection done on the part.

To meet the -55 to 125 temp range I would expect that a thermal cycling test would be done on the part. So if I am able to prove that the manufacturer already performs thermal cycling then I can skip that test when we upscreen the parts. If the answer is that TI does no testing on the parts then that is acceptable too because it would help me baseline where to start for the upscreening.

I do understand that these products are not the EP versions so they may not have any kind of extended testing done on them. I'm trying to figure out what tests are done so that I can put these parts into the right quality level (commercial, industrial, automotive, military, etc.). That will determine how much additional testing I have to do at the third party house. I believe that these parts should be able to fall into an industrial category rather than a full commercial category. But to prove that I need to provide our customer with a test traveler or with some kind of test flow or list to show what is done to the part or what was done to qualify the part initially.

For most manufacturers this kind of information is available on the datasheet or on a quality document that is available upon request. The TI datasheet lists all of the electrical figures that the part is guaranteed to. But it does not show the tests that are done on either a 100% screening level, or on a qualification level for the parts. That kind of screening/qual information is what I am looking for. Not just the electrical values that are listed in the datasheet.

Please let me know if this is the right place to get that kind of information, I can reach out through our distributor channels to get a more official request started if this is the wrong place.

Thank you for your help,

-Neil Gagne

Hi Neil, 

Neil Gagne said:

i'm just looking for a blank test traveler, test flow, or a list of tests performed so that I know what TI does to these parts to ensure their reliability.

I understand your questions now. You are asking for TI's manufacturing proprietary information and practices, and I am not the best person to provide you with these information. I am not manufacture testing engineer for these products.

I will try to find an engineer who may help you with the inquiries. We may or may not be able to provide these information that you are looking for.  

Best,

Raymond

Hi Neil, 

Please submit a "friendship" inquiry via E2E private messaging forum. I am asking the production information to our test engineers and hopefully they will provide answers per your inquiry. Please do not get your hopes up, since we rarely provided these information to our customers. 

Best,

Raymond