REF3025: initial accuracy

user6215897

Part Number: REF3025

Hello,

The initial accuracy defined in the REF3025 datasheet is 0.2% max, looks like a little big, is it included the affection of reliability test like HTOL several hundred hours? if yes, 0.2% max error can be guaranteed after 10-years life?

BRs,

over 3 years ago

0 Masoud Beheshti61 over 3 years ago

TI__Genius 16481 points

Hello,

Initial accuracy is what is referred to to as accuracy out of the box when shipped from TI. The following parameters should help you estimate accuracy over time and temperature. You may want to consider REF35 which is the newer generation of this device: https://www.ti.com/product/REF35

Please refer to https://www.ti.com/lit/wp/slpy003a/slpy003a.pdf

0 user6215897 over 3 years ago in reply to Masoud Beheshti61

Prodigy 50 points

Hello,

thank you.

slpy003a.pdf still can not help me out of this question, let's assume that we have one part REF3025 to be used on the board, its initial output voltage is 2.495V(0.2% error). After 10-years working on the board what's the estimated output voltage?

BRs

0 Masoud Beheshti61 over 3 years ago in reply to user6215897

TI__Genius 16481 points

Hello,

We do not have data beyond the 2000h that I shared earlier. Thanks.

0 user6215897 over 3 years ago in reply to Masoud Beheshti61

Prodigy 50 points

Hello,

Don't need real data, reasonable estimation is ok.

Basing on the post https://e2e.ti.com/blogs_/archives/b/precisionhub/posts/ic-long-term-stability-the-only-constant-is-change, roughly estimated the output voltage after 10-year life will shift 100% of the max initial accuracy, then the absolute voltage can be 0.4% error max double of initial error 0.2% max in the spec. I am confused why 100% shift is used, can you explain it? The 100% shift is only supported by TI or all other vendors providing similar parts?

BRs,

0 Masoud Beheshti61 over 3 years ago in reply to user6215897

TI__Genius 16481 points

Hello,

Unfortunately we do not have any specific data on REF3025 beyond the paper that you have referenced.Thanks.

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REF3025: initial accuracy