DAC38J82: DAC38J82 clock input

Ilya Michlin

Part Number: DAC38J82
Other Parts Discussed in Thread: LMX2531,

Hello,

In the datasheet of DAC38J82 it says that the DAC clock input (DACCLK) is a LVPECT type but I have a sinewave clock generator.

Im using the LMX2531LQ2080E to generate a sine wave 2GHz, 4dBm, singel ended clock.

Can I connect the LMX2531 direcctly to the DACCLKP (and DACCLKN to 50 ohm) with the parameters above?

over 7 years ago

0 dBrock over 7 years ago

TI__Genius 12780 points

Hi Ilya,

We are taking a look into your question, and will be back with you soon.

Best Regards,

Dan

0 Ilya Michlin over 7 years ago in reply to dBrock

Prodigy 120 points

Dear Dan,
Kind reminder...

0 dBrock over 7 years ago in reply to Ilya Michlin

TI__Genius 12780 points

Hi Ilya,

Thanks for your patience.

Yes, the 2 GHz, 4 dBm sinewave will work as a single ended input for the DACCLK on the DAC38J82, but it is recommended that differential signals be used. With the DAC38J82EVM, I used this signal to drive DACCLKP, and tied DACCLKN to a capacitor and ground. Please note that there was not any noticeable difference when DACCLKN was left floating, but I recommend that you place a capacitor to ground.

Best Regards,

Dan

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DAC38J82: DAC38J82 clock input