DAC904: DAC904 CLK Pin requirements

Qiang Ren

Part Number: DAC904

Team,

We want to check with you about the DAC904’s CLK input design requirements. If we use 122.88Mhz LVPECL’s single end as input, is that okay?
Thanks

Qiang

5 months ago

0 Geoff Roth 5 months ago

TI__Expert 3680 points

Qiang,

No, it doesn't have enough swing to cover the VIH and VIL requirements in either of the supply modes. They will need a translator from LVPECL to LVCMOS/CMOS.

Regards,

Geoff

0 Qiang Ren 5 months ago in reply to Geoff Roth

TI__Intellectual 1475 points

Geoff,

So the 3.3V LVTTL can also meet the design requirement? Thanks!

Regards,

Qiang

0 Geoff Roth 5 months ago in reply to Qiang Ren

TI__Expert 3680 points

Qiang,

If the customer has the supply set to 3.3V then a LVTTL signal of 3.3V will work.

Regards,

Geoff

Data converters

Data converters forum

DAC904: DAC904 CLK Pin requirements