AMC1303M2510: Output CLK frequency

Kuramochi Tadahiko

Guru 28715 points

Part Number: AMC1303M2510

Hi,

I received the following question from my customer.

Output CLK frequency is fluctuate from 9.82MHz to 10.35MHz after power up.

Is this correct working?

Is fCLK specified by this behavior?

Best Regards,

Kuramochi

over 7 years ago

0 Tom Hendrick over 7 years ago

TI__Guru**** 175201 points

Hi Kuramochi-san!

The output clock from the AMC1303M2510 should be stable after power up, it should not be fluctuating. Can you describe in a little more detail what you are seeing? Does the frequency change as the power rail comes up, reaching a stable state once power is fully established or does the frequency fluctuate after the power is stable?

0 Tom Hendrick over 7 years ago in reply to Tom Hendrick

TI__Guru**** 175201 points

Hi Kuramochi-san!

Do you have any additional detail for me?

0 Kuramochi Tadahiko over 7 years ago in reply to Tom Hendrick

Guru 28715 points

Tom-san,

Thank you for your minding.

I'm confirming the customer how to measure frequency.
I don't receive the reply yet.

I close this thread once.

Best Regards,
Kuramochi

0 Kuramochi Tadahiko over 7 years ago in reply to Kuramochi Tadahiko

Guru 28715 points

Hi Tom-san,

Firstly I answer your question.

>Does the frequency change as the power rail comes up, reaching a stable state once power is fully established or does the frequency fluctuate after the power is stable?

My customer says that they measure output clock after power rail is stable.

And I have an additional question.
Should they measure after tASTART specified on the detasheet?

Best Regards,
Kuramochi

0 Tom Hendrick over 7 years ago in reply to Kuramochi Tadahiko

TI__Guru**** 175201 points

Hi Kuramuchi-san,

Measuring after tASTART is fine. If the frequency is shifting, please let us know.

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AMC1303M2510: Output CLK frequency