Hi SebastianS,
Please check below comment for reference,
according to articles in this forum the accelerated lifetime tests have been performed for 1000 h to represent a normal workload for a lifetime of 10 years. We plan on using the BME in a product where the minimum expected lifetime will exceed the 10 years. By projecting the 1000 h test duration to a lifetime of 10 years, what is assumed on how frequently a measurement will be done under these workload conditions and can we thereby assume to exceed the lifetime expectancy by lowering the measurement frequency?
- Normally the HTOL(High Temperature Operating Life) test will follow JESD22-A108D standard, I think customer can use this document for reference
Will the unit expectantly be more inaccurate if it ages? Therefore, taking a derating into account the influence of an aging unit could be compensated.
- Customer can reference the sensor long term stability data in the datasheet, and normally the data is based on the accelerate aging test result
What are best practices for self-testing the sensor without another nearby measurement value as a reference, to detect a failing unit?
- Customer can use self-test example code to check the sensor functions
Also, we plan on a storage temperature of -50°C which is below the sensor’s abs max ratings. Is it possible for the sensor to be placed under these conditions if a power up will only happen at temperatures > -45°C?
- The sensor's storage range is from -45°C to +85°C(≤65% rH), and operating range is from -40°C to +85°C
- Doesn't suggest to operate the sensor over above range
Thanks.
