HDC1080: After 10 months in the temperature warehouse of HDC1080 sensor, the product accuracy is higher than 10%

jian li

Part Number: HDC1080

Sensor products: HDC1080 products were produced from 2017 to October and passed the calibration.After the delivery to the end customer, the customer did not use it in time and kept it in the room temperature warehouse for about 10 months

The HDC1080 test humidity was high in the re-opening test, as shown below

Placed in a room temperature warehouse, 10 months later, ready for production.There was a 10% deviation in the laboratory temperature before production

fyi:e2echina.ti.com/.../159479

over 7 years ago

0 Matthew Sauceda over 7 years ago

TI__Genius 11750 points

Hi Jian,

Thanks for posting to the e2e forums. The only items that may impact performance and accuracy is if the product is exposed to any solvents, vapors, or chemicals that would impact device accuracy. I've included a link to a document that displays correct guidelines when using humidity sensors:

Humidity Sensors: Storage and Handling Guidelines: www.ti.com/.../snia025

May I ask about their temperature and humidity reference and setup during the test?

Best Regards,
Matt

0 jian li over 7 years ago in reply to Matthew Sauceda

Prodigy 40 points

Hello, thanks for your reply!
I would like to ask if the following picture is used for packaging. After 10 months of storage at room temperature, the test is biased. Is this kind of packaging not feasible?

0 Matthew Sauceda over 7 years ago in reply to jian li

TI__Genius 11750 points

Hi Jian,

It's difficult to determine if that is the case. As noted, the device is sensitive to chemical vapors and solvents. For example, if any adhesives or supper glue type of products were used in the assembly of the board, it may impact device performance.

Where you able to obtain the information to my questions posted above, pertaining to their test?
When they tested the devices, did they let them settle for 2-3 days in ambient conditions before the test was conducted?
Was the customer setup similar to your own when calibrating the device?

I would imagine that the device being packaged in the ziplock may have needed to be aired out and settled for operation.

Best Regards,
Matt

0 Matthew Sauceda over 7 years ago in reply to Matthew Sauceda

TI__Genius 11750 points

Hi Jian,

Any update on the above?

Best Regards,
Matt

0 jian li over 7 years ago in reply to Matthew Sauceda

Prodigy 40 points

At present, no specific reason has been found, so we need to ask TI to do FA report analysis?

Refer to attachment storage environment and schematics

0 Matthew Sauceda over 7 years ago in reply to jian li

TI__Genius 11750 points

Howdy Jira,

I've been contacted internally regarding this issue, so will align with what I find through email to this post and vice-versa. Thank you for the files, can you give more insight into testing and the equipment used for test? Also, you've mentioned the packaging, but can you verify if the sensors were exposed to any vapors or contaminants?

Best Regards,
Matt

0 Raymond Chiu over 7 years ago in reply to jian li

Intellectual 340 points

Jian, I am interested in learning more about your sensors (I am assuming that they are for sale, if not let me know). Do you have a website?

0 jian li over 7 years ago in reply to Raymond Chiu

Prodigy 40 points

http://www.aosong.com/

0 Matthew Sauceda over 7 years ago in reply to jian li

TI__Genius 11750 points

Howdy Jian,

I'm taking this thread offline, as we are continuing communication through email.

Best Regards,
Matt

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HDC1080: After 10 months in the temperature warehouse of HDC1080 sensor, the product accuracy is higher than 10%