HMC788A: inductor for single tone @ 5GHz

Hello,

I want to use the HMC788A in order to amplify a 5GHz single tone provided by a PLL (LTC6948-3).

I'd like to avoid using the bulky spiral inductor proposed in the evaluation board.

Given the frequency, which SMT inductor would you recommend? Can you confirm that using the 0402DF-221XJRW from Coilcraft is a good choice?

Thank you in advance for your support.

Best,

Thomas

  • +1
    •  Analog Employees 
    on May 10, 2021 4:44 PM

    We have found that the MMZ0603S102ET000 from TDK works well down to 100 MHz (see attached results).  We have also found that the Coilcraft  0402DF-901XJRW is a good 0402 sized alternative to a spiral inductor. In your case, you are not concerned about wideband or low frequency operation.  Also, the device you are looking at using (0402DF-221XJRW) is in the same family as the Colicraft device that we have tested and looks to have similar specification. If I was making the recommendation I would go with 0402DF-901XJRW since we have verified the operation of this. However, I think that 0402DF-221XJRW will work fine also.