REF2030, REF1930, and REF3430 long term drift

Hello Scott,

Long term stability for REF3430 changes from 25ppm to 10ppm after first 1000hrs to next 1000hrs to 2000hrs at 35C. So, you can consider this information which will gradually decrease fro your purpose.

I hope it helps!

-Tony

Hello Scott,

I made a mistake in my last thread. It is 'increase' instead of 'decrease'.

Long term stability of REF3430 is 25 ppm for first 1000hrs and changes and estimated value comes to 250ppm. Real time data for 100khr is too long. So, estimated value comes close to 250ppm.

I hope it helps!

-Tony

Hello Scott,

For our older devices such as REF1930 and REF2030 we only spec the LTD for the first 1000 hours which is 60ppm typical. Hope that answers your question. 

Thanks.

Hello Masoud,

Thank you for the reply. We are designing a product for a well established client that is intended to operate continuously for 20 years, with the requirement of precision accuracy and reliability. Over the life time of the product is expected to sell millions of units so component selection and reliability testing are key.  I am looking data or specification that will convey confidence that there is reasonable expectation that after many years of operation that the product will retain a good level of precision.  I realize that is not possible to have 20 years of data on this product, but some method of predicting a typical long term drift would be required to include these products in our selection process.  ie ppm/time (ppm/sqrt(khrs)) or other trendline data to predict where it will be at (typically) after several years of operation.

Thank you,

Scott

Hello Scott,

Thanks for circling back.

My recommendation would be to consider REF3430. This device has the lowest long term drift  as well best set of data in the datasheet. 

Thanks.