LMK04828: Alternative clock for the ADS42LB69 ADC

Dennis Brown

Part Number: LMK04828
Other Parts Discussed in Thread: ADS42LB69, , LMX2594, LMX2572, LMK03328, LMK03318

I have an ADS42LB69 ADC that is being driven right now by a SiLabs Si5326. I don't think the Si5326 has good enough jitter specs to have this device meet TI's datasheets specs for this ADC. TI has the LMK04828 but this is a fairly big part with too many clock outputs. I only need enough clock lines to drive two ADC's. My needs are way less than 14. Is there an in between clock device that would work for this 16 bit ADC?

over 4 years ago

0 Ajeet Pal over 4 years ago

TI__Genius 12560 points

Hi Dennis,

If you would need just only 2 low jitter clocks for ADCs, you can use LMX2572 (low power device) or LMX2594 PLL synthesizer, which would have a jitter in the range of ~50fsec.

Thanks & Regards,

Ajeet Pal

0 Dennis Brown over 4 years ago in reply to Ajeet Pal

Prodigy 230 points

Thank you Ajeet. This is very helpful.

0 Ajeet Pal over 4 years ago in reply to Ajeet Pal

TI__Genius 12560 points

Dennis,

One more point to note, single LMX PLL synthesizer can be used, if both ADCs would need a same sampling clock frequency as these devices has common frequency channel divider. If two different frequency clocks for each ADC needed, you can use LMK03318 or LMK03328.

Clock & timing

Clock & timing forum

LMK04828: Alternative clock for the ADS42LB69 ADC