LMX2594: LD_DLY setting and delay time

Taketo Sato

Part Number: LMX2594

Hello team,

I have a question about LMX2594 LD_DLY setting.

My understanding of LD_DLY is it defines delay time from calibration finish to lock detect high. But I don't know how the setting value affect the delay time.

Could you please let me know how to calculate delay time?

For example, how long will it delay when LD_DLY=1000?

Best regards,

over 7 years ago

0 Noel Fung over 7 years ago

TI__Guru** 121020 points

Hi Sato-san,

LD_DLY runs on reference clock /4.
for 100MHz ref clock, LD_DLY=1000 implies 40µs delay.

0 Noel Fung over 7 years ago in reply to Noel Fung

TI__Guru** 121020 points

Hi Sato-san,

LD_DLY should be running on fpd/4, NOT ref clock/4.

My apologies.

Clock & timing

Clock & timing forum

LMX2594: LD_DLY setting and delay time