LTC5562 mixer evaluation board - urgent response required!

Dear Analog Devices,

We are trying to do a demo for a customer in which we would like to use the LTC5562 DC2483A-B evaluation board (LTC5562 mixer as a downconverter) spannered in to our set-up. For this demo we only need one set of frequencies:

RF = 5.5GHz

LO = 7.1GHz

IF = 1.6GHz (LO - RF)

There is a major hang up though: On the evaluation board the RF port of the mixer has a 1:1 transformer fitted, the TC1-1-13M+ from Mini Circuits, which doesn't go up to 5.5GHz. Mini Circuits do have transformers that go up to 6GHz, even 8GHz, BUT they are not footprint compatible. Does anyone here know of any transformers that can fit on the evaluation board to allow us to tune the LTC5562 to the aforementioned frequencies. For the IF port there are footprint compatible alternatives, while the LO can be single-endedly driven. The RF port is holding us up though.

Suggestions welcome!

Cheers,

Michael 

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  • Weston, thank you for your reply. I read the datasheets in the first place and saw the proposed alternative for the high frequency operation, the TCM1-83X+ from Mini Circuits, except there is a problem: there is no footprint compatibility for the LTC5562 evaluation board. You can still use it but you have to somehow short-circuit pins 5 and 6, which I found compromises the RF performance, especially the conversion loss, by a few dB. I think the TCM1-63AX+ might be a better option for the very evaluation board. The evaluation board I am on about is the DC2483A-B, with the mixer configured as a down-converter.

  • 0
    •  Analog Employees 
    on Jul 31, 2019 1:12 PM over 1 year ago in reply to Mike.perdikakis@aceaxis.co.uk

    Hi Mike,

    This is how all the 7-8GHz data was collected for the datasheet. We also used the standard evaluation board. That said, the TCM1-63AX+ is definitely an option for your use case as well.

    Thanks,
    Weston Sapia
    Sr. RF Applications Engineer
    Analog Devices