DS90UB953-Q1: Input clock jitter for non-synchronous mode (tJIT)

K.Yaita

Part Number: DS90UB953-Q1
Other Parts Discussed in Thread: DS90UB913A-Q1

Hi Team,

The DS90UB953-Q1 datasheet shows the following about tJIT.

Could you tell me the condition of LPF, CDR PLL Loop BW and BER?

DS90UB913A-Q1 datasheet shows these as the following so I would like to know.
- DS90UB913A-Q1

Best Regards,
Yaita

over 6 years ago

0 Jiashow Ho over 6 years ago

TI__Genius 11340 points

Hi Yaita,

We swept the jitter frequency from 50kHz to CLKIN with 1MHz steps.

BER @ 10^-10

Best,

Jiashow

0 K.Yaita over 6 years ago in reply to Jiashow Ho

Guru 29720 points

Hi Jiashow-san,

Thank you for your reply. I would like to ask additional questions.

1)
There is two case (CLIKN_DIV=1, CLKIN_DIV=2) in non-synchronous external clock mode.
Is the condition you refered same for each case?

2)
We considers evaluating tJIT with DPOJET (Jitter and Eye Diagram Analysis) and would like to know the following.
- Is PLL type "TypeⅡ"?
- Is Damping factor "2"?

Best Regards,
Yaita

0 Jiashow Ho over 6 years ago in reply to K.Yaita

TI__Genius 11340 points

HI Yaita,

1) Yes.

2) PLL type II, Damping factor 0.707

Jiashow

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DS90UB953-Q1: Input clock jitter for non-synchronous mode (tJIT)