Painful trouble ,LIS3LV02DL output data suddenly changes at Low temperature(-10 Centigrade)

Posted on September 24, 2013 at 18:45

Hello Watanabe,

Has this problembeen happening on more than one part?

The compensation in temperature should be linear, so I believe there must be some stress happening at package level.

The attached file shows the guidelines for application development that might aid your inquiry as well.

Could you please inform where are you located? That way we can address your issue with the local MEMS Application Engineer from ST.

Thank you,

Thiago

________________

Attachments :

TN0018_Rev_3.pdf : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006HzBB&d=%2Fa%2F0X0000000bKC%2FBdKUBVJ172XtFSMDkog97lMiTxQjPpaLLksOtqlaixk&asPdf=false

Posted on September 25, 2013 at 04:36

Hello Thiago

Thank you for the reply. 

I reply to your questions.

 

<Has this problem been happening on more than one part?>

-> Almost all parts have this problem.

    But the temperature at this phenomenon happens is distributed. 

<Could you please inform where are you located?>

-> Tsubame Niigata Japan

Thank you,

Watanabe

Posted on September 26, 2013 at 04:01

Hello Thiago

Thank you for the reply. 

Does PCB stress cause the phenomenon (=output data suddenly　changes at Low temperature) or device specific?

Thank you,

Watanabe

Posted on September 26, 2013 at 04:11

Hello Thiago

Thank you for the reply. 

If the phenomenon (output data suddenly　changes at Low temperature) happens

at 0 Centigrade ,does water cause that?

Thank you,

Watanabe

Posted on October 02, 2013 at 15:55

Hello Watanabe,

Yes, water can be the source of your issue.

Please also verify the attached datasheet on the following items:

- Table 3

- Figures 16 to 23

I hope this information helps to better understand the problems that you are facing. Otherwise, I will be more than happy to support you on your development.

Thank you,

Thiago

________________

Attachments :

LIS3LV02DL.pdf : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006HzKv&d=%2Fa%2F0X0000000bKA%2FU5ssLXuWoRAYRaWL3oY.gYiXInz7g.Ueq449TdLVh2A&asPdf=false

Posted on October 07, 2013 at 08:22

Hello Thiago

Thank you for the reply. 

We are using anti-humidity insulation coating for PCB.

Does it cause transfer PCB stress to  sensor ?

Thank you,

Watanabe

Posted on October 18, 2013 at 02:50

Hello Thiago

Thank you for the reply. 

We found gradually that insertion type connector cause this trouble.

We are soldering two steps.

1. reflow soldering for MEMS inertial sensor.

2. flow soldering for insertion type connector.

We used hand soldering for insertion type connector then the phenomenon (=output data suddenly　changes at Low temperature) 

disappeared.

Thank you,

Watanabe

Posted on October 22, 2013 at 14:44

Hello Watanabe,

that is great news! I am glad that you could address the issue by modifying your soldering process.

Please do let me know if there is anything else that I can do for you.

Thank you,

Thiago