LMK00334-Q1: PCIe gen 2 additive phase jitter

Jack McCulloch

Part Number: LMK00334-Q1

Hi,

Do you have figures for additive RMS phase jitter for the LMK00334-Q1 with the PCIe Gen 2 high band (1.5MHz - Nyquist) and low band (10kHz-1.5MHz) filters applied?

Thanks,

Jack

over 3 years ago

+1 Lane Boyd over 3 years ago

TI__Genius 16845 points

Hi Jack,

Similar question has been asked on the forum before: https://e2e.ti.com/support/clock-and-timing/f/clock-timing-forum/844493/lmk00334-q1-lmk00334rtvrq1-pcie-2-0-jitter

The typical value for high band is 116fsRMS and the typical value for the low band is 27fsRMS.

Kind regards,
Lane

0 Jack McCulloch over 3 years ago in reply to Lane Boyd

Prodigy 60 points

Thanks Lane,

Can we use the 116fs and 27fs figures as the max expected jitter over the operating temperature range of the device?

I know this was asked in the linked post but I just want make sure I've understood the response correctly.

0 Lane Boyd over 3 years ago in reply to Jack McCulloch

TI__Genius 16845 points

Hi Jack,

116fs and 27fs figures was the max expected jitter at room temp for the device tested using PCIE gen 2.0 filters, and was reported as the typical value. It would still provide significant margin compared to the PCIE 2.0 limits of 3.1ps for high frequency jitter and 3.0ps for low frequency jitter.

There isn't enough data available to specify the max value. However, even if we used a multiplier of 1.5x times the typical to assume the max value, you would still have plenty of margin.

Kind regards,
Lane

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LMK00334-Q1: PCIe gen 2 additive phase jitter