ADC12DJ3200: SAMPLING RATE V/S INPUT SIGNAL FREQUENCY

Chundra Ramful1

Part Number: ADC12DJ3200

Can the ADC12DJ3200 be used for direct sampling of a modulated 40 GHz RF signal (modulated carrier) with a useful signal bandwidth of 2GHz?

over 5 years ago

0 Neeraj Gill over 5 years ago

TI__Mastermind 20541 points

Hi Chundra,

The Analog input bandwidth of ADC12DJ3200 is about 8GHz. I don't think you will be able to directly sample 40GHz signal with it.

Regards,

Neeraj

0 Chundra Ramful1 over 5 years ago

Prodigy 250 points

Hi Neeraj,

Thank you for the prompt reply. So if I am correct, even your fastest ADC cannot allow undersampling of a modulated carrier at 40GHz? The idea is to avoid the use of a mixer.

I guess the input signal is way too fast for the ADC to "see", correct?

0 Rob Reeder over 5 years ago in reply to Chundra Ramful1

TI__Mastermind 40830 points

Hi Chundra,

If you use a track-n-hold (T/H) in front of the 3200 ADC, that would get you to 18-20GHz analog BW. Hittite and Inphi would be my suggest if you go this route.

Otherwise, you might try looking at the Jariet Technologies ADC if you need something now w/ 40GHz BW.

Regards,

Rob

0 Chundra Ramful1 over 5 years ago in reply to Rob Reeder

Prodigy 250 points

Hi Rob,

Thank you for responding. I will check out Jariet but I sure price will be an issue.

Would there be any design example for the 18-20GHz option you said is possible using the 3200 device?

Chundra

0 Rob Reeder over 5 years ago in reply to Chundra Ramful1

TI__Mastermind 40830 points

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ADC12DJ3200: SAMPLING RATE V/S INPUT SIGNAL FREQUENCY