OPA1602: Date Code marking - OPA1602AIDGKR

Hi Raymond,

Could you advise is there any technical difference or functionally difference of the 2 TI OPA models below?

OPA1602AIDGK
OPA1602AIDGKR

Hi Raymond,

I am colleague of CheongMei.

Currently we are having this part issue with this part as below info:

Per/PCA: 8

Failure Rate: 50%

Suspected Part:V1826-9296

MPN: OPA1602AIDGKR

Date Code used: 4223

Material Qty in stock: 2081 pcs

Remarks: There is only one date code used on the failed batch which is also the same date code in stock.

Marginal result at 20kHz and 5kHz range.

Debug Analysis done:

1.0 We had identified on each HR_CHMO PCA only 4 CRDs affected (U57211, U76202, U19211, U38211) out of the 8 per in same board.

2.0 We had visually inspected all suspected CRDs, no anomalies found.

3.0 All HR CHOM cards passed Pretest on first time test.

4.0 Did initial workaround to validate the failure as aligned with our QE, ME and Production.

4.1 Had all the 4 CRDs under PN: V1826-9296 (OP Amp) removed only.

4.2 Afterwards cleaned component bottom side

4.3 Cleaned the PCB area underneath the component.

4.4 Remounted and solder back the original components at each respective original location.

4.5 Then assembled back all E9740-66404 cards to their respective location at HLA.

4.4 We retest at FVT. All still failed the same.

5.0 We had tried using PN:V1826-9296 (OP Amp) parts with a different date code and passed.

I would like to request return 8pcs this parts for FA based on our feedback, please kindly go through above info and advise how are we going to return the part perform FA.

Hi Yap Jun,

Yap Jun Yi said:

Marginal result at 20kHz and 5kHz range.

OPA1602  is specifically designed for audio application. The op amp's BW is up to 35MHz, and it is hard to believe that it has issues down to 20kHz range. I am not aware of any recent FAB change in the product. 

This is the only PCN that I found, which is related to molding compound change, but it should not affect the op amp's performance. 

https://www.mouser.com/PCN/Texas_Instruments_PCN_20240628012.1_Notification.pdf

Could you provide me with your audio schematic and I will take look what may be the issues?

If you prefer to contact me in private, please post "friendship" request via E2E private messaging system, and we can exchange contact information (including my internal email contact) after the communication is established. 

Yap Jun Yi said:

I would like to request return 8pcs this parts for FA based on our feedback, please kindly go through above info and advise how are we going to return the part perform FA.

The E2E is a technical support forum; we do not handle part return. To ask for return or exchange, you have to contact TI customer's support or TI authorized distributors. I do not know how the return process works currently. 

https://www.ti.com/info/customer-support.html

If you have other questions, please let me know. 

Best,

Raymond

Thanks Raymond. I already post the "friendship" request. Beside request for FA, I would also like to discuss the technical issue for this part with you.

Please kindly accept the friend request and provide your email contact for further discussion.