ADS54J69: Clock input protocol

Kazuki Itoh

Genius 10770 points

Part Number: ADS54J69

Hi team,

Does ADS54J69 input clock (device clock and SYSREF clock) accept either LVDS or LVPECL?

It looks like the datasheet p.7 mentions it accepts both of them.

But it is not clearly stated so I'd like to make it sure.

Regards,

Itoh

over 3 years ago

0 jim s over 3 years ago

TI__Guru* 91947 points

Kazuki,

The device clock can use both as shown in section 7.3 of the data sheet. SYSREF can use both but if using DC coupling, you need to make sure the common mode is set per the data sheet limits. The TI EVM uses LVPECL for both. See attached schematic.

Regards,

Jim

7446.ADS54JxxEVM SCH_D.pdf

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ADS54J69: Clock input protocol