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TRF3705, signal at LOM pin?

Dimitrius
Intellectual 1315 points
Other Parts Discussed in Thread: TRF3705

Hello All

TRF3705 has 2 inputs: LOP и LOM. At another IQ modulators usually LOM is connected to the ground. What kind of signal the customer shall apply to LOM?

I need Application notes.

What does comment at the first page of the datasheet mean  " (1) Appopriate matching network is required for optimal performance at 300MHz"?

Best regards,

Dmitry

  • 0
    TI__Mastermind 18095 points

    For SE LO input operation you can terminate the LOM with 50 ohms through a DC blocking capacitor.

    For operation at lower frequencies around 300 MHz, the internal output balun is operating at the fringe of its range.  Optimizing the output match for the specific frequency of interest will yield improved gain and IP3 performance.

    --RJH