Tool/software:
The TRIM function of OPA134 has disappeared in Rev.B and it seems to have become NC.
(Example: 8-pin SOIC 1pin and 8pin)
I have a few questions, so please answer them.
1. When did the TRIM function disappear?
2. Why was there no PCN beforehand?
3. Can you tell by appearance whether or not the TRIM function is present?
I have a board with OPA134 installed, so please answer as soon as possible.
Hello,
The trim pin is now a no connect pin on the new revision. This was revised in the product datasheet in August of 2024. The device is now laser trimmed. Leaving your trim circuitry in place won't cause any problem with the new revision of the device since it is a no connection. The PCNs that were released can be found in the mouser link below:
The PCN below is the one regarding a design change.
https://www.mouser.com/PCN/Texas_Instruments_PCN20231219018_20231222025145143.pdf
Until all inventory is purchased out of the market it is possible to receive a mix of old and new revisions. Unfortunately there isn't an easy way to distinguish between the two other than and offset measurement. I hope this information is helpful. Let me know if I can be of further assistance.
Best Regards.
Chris Featherstone
