HMC830 Frequency Hopping - Direct LUT ?

Hello,

I'm working with the PLL VCO HMC830.

I want to use a look-up table (LUT) for manual calibration, as decribe in "Frequency Hopping with Hittite PLLVCOs Application Note" (attached) (https : // www . hittite.com/content/documents/application_notes/Fast_Frequency_Hopping_Application_Note.pdf).

It should have equivalence between the desired frequency and capacitors switches configuration (Reg 10h Register Tune VCO).

I wonder if somebody already have those data and could provide it.

Thank you very much in advance.

Fast_Frequency_Hopping_Application_Note.pdf
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  • 0
    •  Analog Employees 
    on May 8, 2015 5:34 PM

    The LUT is device specific. From page 4 in the app-note:

    If you generate the LUT with one device and use it on another the switch capacitor selection might not be optimum over temperature and time.  I believe you want to use the "Direct LUT" method as described in the app-note.   This method associates each desired frequency with a switch capacitor selection.

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  • 0
    •  Analog Employees 
    on May 8, 2015 5:34 PM

    The LUT is device specific. From page 4 in the app-note:

    If you generate the LUT with one device and use it on another the switch capacitor selection might not be optimum over temperature and time.  I believe you want to use the "Direct LUT" method as described in the app-note.   This method associates each desired frequency with a switch capacitor selection.

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