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.
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.
Autocal will pick the best VCO and switch capacitor setting for a given frequency. The actual location of the "jumps" vary depending on the VCO.
You can decode Reg 0x10 as follows:
Reg 0x10[7:6] VCO selection, 11b= lowest frequency)
Reg 0x10 don't care, may by high or low
Reg 0x10[4:0] switch capacitor setting (11111b=lowest frequency)
As you see the cause of the large jumps is the don't care bit 5. If you create a new 7 bit number by concatenating [7:6] with [4:0] you will get a steady decrease in this number as you perform the same measurement. But for any given frequency the number will vary from part to part.