LMX2572: the correct connection of sync pin for two LMX2572 PLL

Tee Keng Tan

Part Number: LMX2572

Tool/software:

HI,

We would like to phase sync two LMX2572. However, we are not sure how to connect the sync pins of both the LMX2572. is there any guideline to do so?

KennY Tan

3 months ago

0 Noel Fung 3 months ago

TI__Guru** 107880 points

Hi Kenny,

You can refer to below EVM schematic.

https://www.ti.com/lit/pdf/snau278

0 Tee Keng Tan 3 months ago in reply to Noel Fung

Prodigy 30 points

Hi,

Thanks for your reply. Unfortunately, the EVM schematic only pull the sync to a connector without connecting ot other signal. thats why it is confused.

Is there any guideline on how to use the sync pins for 2 x LMX2572?

Kenny Tan

0 Noel Fung 3 months ago in reply to Tee Keng Tan

TI__Guru** 107880 points

Hi Kenny,

SYNC is a CMOS signal, min. VIH requirement is 1.4V.

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LMX2572: the correct connection of sync pin for two LMX2572 PLL