LMK04616: LMK04616 and CDCLVP1204 voltage level compatibility

DDC

Part Number: LMK04616
Other Parts Discussed in Thread: CDCLVP1204

Hello,

I'm looking for how to properly connect in AC-coupled a CLKOUT output of the LMK04616 with an input of the CDCLVP1204.
Both components do not seem to be electrically compatible :
- LMK04616 generates at least (in 4-mA HSDS mode) a VOD of 958 mVpp
- CDCLVP1204 expects a VID between 0.2Vpp and 1Vpp.
Should I be concerned about this small margin of tension between the components ?
To protect myself from it, I had thought to put in the output of the LMK resistances serie on the line
To adapt these voltage levels, I plan to put serial resistors on the CLKOUT of the LMK04616.
what do you recommend me to do ?

Regards
DDC

over 4 years ago

0 Noel Fung over 4 years ago

TI__Guru* 81580 points

Hi DDC,

VOD of LMK04616 HSDS-4mA is 958mVpp differential while the VID of CDCLVP1204 is 1.5Vpp differential, they can be connected together without voltage divider.

Use the connection diagrams as shown in Figure 18 and 19 in CDCLVP1204 datasheet.

0 DDC over 4 years ago in reply to Noel Fung

Prodigy 20 points

Hi,

Thank you for your quick reply.
Could you tell me what is the maximum VOD for the CLKOUT in 4-mA HSDS ?
I find this information for OSCout while only the typical value is specified for CLKOUT :(

Regards
Damien

0 Noel Fung over 4 years ago in reply to DDC

TI__Guru* 81580 points

Hi Damien,

I don't have the max. data but I expect the tolerance is similar to the OSCout buffer, approx. +/- 170mV.

Clock & timing

Clock & timing forum

LMK04616: LMK04616 and CDCLVP1204 voltage level compatibility