Forums - QCA9377-3 failing at cold temperature

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QCA9377-3 failing at cold temperature
keith.ellens
Join Date: 3 Sep 20
Posts: 4
Posted: Thu, 2020-09-03 11:37

We are using the QCA9377-3 on our board. It is failing to initialize when the temperature is below -10C. This part is rated for -40to85, correct?

The error we are seeing it that it writes to CCCR register 02 (I/O Enable). It then reads register 03 (I/O Ready), expecting a value of 02. But we are getting a value of 00.

Has anyone had a problem with this chip at cold? For a value of 02, what funciton is failing to initialize?

 

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ddeepakk Moderator
Join Date: 27 Jun 17
Posts: 85
Posted: Fri, 2020-09-04 00:00

Hi Keith,

Temperature range can vary. Please check with your module vendor.

Thanks.

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keith.ellens
Join Date: 3 Sep 20
Posts: 4
Posted: Fri, 2020-09-04 09:16

We are not using a module. We purchased the IC and put it on our board. Please verify the temperature range of the IC.

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keith.ellens
Join Date: 3 Sep 20
Posts: 4
Posted: Fri, 2020-09-04 09:50

I may have misunderstood. When you say "module" do you mean the IC? In some place the IC is refered to as a module. I was assuming that you meant a eval module from Silex or Murata.

Are there different versions of the IC with different temperature ratings?

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ddeepakk Moderator
Join Date: 27 Jun 17
Posts: 85
Posted: Sat, 2020-09-05 00:03

>>I may have misunderstood. When you say "module" do you mean the IC?
YES.

>>Are there different versions of the IC with different temperature ratings?
YES.

Does it work for normal room temperature ranges?

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keith.ellens
Join Date: 3 Sep 20
Posts: 4
Posted: Tue, 2020-09-08 05:03

Yes, at room temperature it works fine. It works down to -10C.

The full part number is QCA-9377-3-115WLNSP-SR-03-0 . What is the temperature range for this part?

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ddeepakk Moderator
Join Date: 27 Jun 17
Posts: 85
Posted: Tue, 2020-09-08 22:55

for temperature range, please check with your module vendor.

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