3 ms·

After watching the video, the main limitation is the compute bandwidth and the bottleneck between SDR and the compute platform. The 9081 will happily pass you

After watching the video, the main limitation is the compute bandwidth and the bottleneck between SDR and the compute platform. The 9081 will happily pass you 4 billion 16 bit samples per second. Like the video says: that’s sixteen lanes of PCIe 3.0! The selective DDCs on the AD9081 are a big deal. Pretty clear line to ELINT applications: numerically resample to a few bands of interest for comms or radar, and you can use a 9081 for direction finding for 8 bands with 20MHz resolution. Even at $2k per chip, a rack full of them is still a bargain compared to an EA-18. ADI does some truly impressive A/D engineering.

ChuckMcM 4y ago
Agreed, and Digikey has parts in stock for just $2,625.30 each :-). (well for the 4 channel ones). Although it also explains why we've had a kind of "rush" on GHz quad channel oscilloscopes (Keysight, Tektronix, R&S, and even Rigol all have updated offerings that probably use this chip). I'd love to play with one but I am not going to fork over $44K for an evaluation board. [1] https://www.digikey.com/en/products/detail/analog-devices-inc/AD9081BBPZ-4D4AC/13918918 https://www.digikey.com/en/products/detail/analog-devices-in...
- CamperBob2 4y ago
  Evaluation, shmevaluation. That's what dead-bug construction is for.
  - ChuckMcM 4y ago
    Okay I chuckled at that, trying to imagine doing dead-bug construction with 28 GBps differential pairs on a BGA package is not something I want to take on :-)
- cushychicken 4y ago
  Did you know Rigol offers a quad channel 5GHz scope now? https://www.tequipment.net/Rigol/DS70504/Digital-Oscilloscopes/ https://www.tequipment.net/Rigol/DS70504/Digital-Oscilloscop... Still sets you back the price of a new car, but since Rigol is working hard to compete on price, it’s a new Corolla instead of a new S Series. I’ve never thought about how it’s datapath ICs enabling this little rush on cheaper GHz scopes. I’d be a bit surprised if Rigol was using ADI - I wouldn’t expect them to have the volume to buy ADI parts and get them supported. (I’d also wager there’s likely some export controls on chips like this guy.)

ChuckMcM 4y ago

Agreed, and Digikey has parts in stock for just $2,625.30 each :-). (well for the 4 channel ones). Although it also explains why we've had a kind of "rush" on GHz quad channel oscilloscopes (Keysight, Tektronix, R&S, and even Rigol all have updated offerings that probably use this chip). I'd love to play with one but I am not going to fork over $44K for an evaluation board. [1] https://www.digikey.com/en/products/detail/analog-devices-inc/AD9081BBPZ-4D4AC/13918918 https://www.digikey.com/en/products/detail/analog-devices-in...

CamperBob2 4y ago
Evaluation, shmevaluation. That's what dead-bug construction is for.
- ChuckMcM 4y ago
  Okay I chuckled at that, trying to imagine doing dead-bug construction with 28 GBps differential pairs on a BGA package is not something I want to take on :-)
cushychicken 4y ago
Did you know Rigol offers a quad channel 5GHz scope now? https://www.tequipment.net/Rigol/DS70504/Digital-Oscilloscopes/ https://www.tequipment.net/Rigol/DS70504/Digital-Oscilloscop... Still sets you back the price of a new car, but since Rigol is working hard to compete on price, it’s a new Corolla instead of a new S Series. I’ve never thought about how it’s datapath ICs enabling this little rush on cheaper GHz scopes. I’d be a bit surprised if Rigol was using ADI - I wouldn’t expect them to have the volume to buy ADI parts and get them supported. (I’d also wager there’s likely some export controls on chips like this guy.)