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LMX1204EVM: Trouble setting up multiplier

Martin Burgmair
Prodigy 10 points
Part Number: LMX1204EVM
Other Parts Discussed in Thread: LMX1204

Hi, 

I have difficulties setting up the multiplier on the LMX1204EVM using TICS Pro (1.7.5.7), see screenshot and register settings below. What am I missing?

Thanks in advance, Martin

2086.HexRegisterValues.txt 
R90	0x5A0000
R86	0x560000
R79	0x4F0004
R75	0x4BE713
R72	0x480000
R67	0x4351CB
R65	0x4145F0
R34	0x220005
R33	0x215666
R29	0x1D05FF
R28	0x1C0A08
R25	0x190213
R24	0x1804F5
R23	0x17E040
R22	0x160000
R21	0x15FE00
R20	0x14FE00
R19	0x13FE00
R18	0x12FE00
R17	0x1107F0
R16	0x101003
R15	0x0F0901
R14	0x0E0002
R13	0x0D0000
R12	0x0CFFFF
R11	0x0BFFFF
R9	0x09001E
R8	0x080120
R7	0x070000
R6	0x0636DC
R5	0x054936
R4	0x04360F
R3	0x03FF84
R2	0x0200A3
R0	0x000000

  • +1
    TI__Genius 12550 points

    Hi Martin,

    LMX1204 can be operate in multiplier mode for the Fout frequencies between 3.2G to 6.4GHz.

    Hence for the x2, input frequency should be min 1.6GHz and VCO need to be calibrate for output generation.

    Below is the updated config file (for 2G input) operating in multiplier mode FYR.

    LMX1204_Multiplier_E2E_updated.txt 
    R90	0x5A0000
R86	0x560000
R79	0x4F0004
R75	0x4BE713
R72	0x480000
R67	0x4351CB
R65	0x4145F0
R34	0x220005
R33	0x215666
R29	0x1D05FF
R28	0x1C0A08
R25	0x190213
R24	0x1804F5
R23	0x17E040
R22	0x160000
R21	0x15FE00
R20	0x14FE00
R19	0x13FE00
R18	0x12FE00
R17	0x1107F0
R16	0x101003
R15	0x0F0901
R14	0x0E0002
R13	0x0D0000
R12	0x0CFFFF
R11	0x0BFFFF
R9	0x09001E
R8	0x080120
R7	0x070000
R6	0x0636DC
R5	0x054936
R4	0x04360F
R3	0x03FF86
R2	0x0200A3
R0	0x000000

    Thanks!

    Regards,

    Ajeet Pal

  • 0 in reply to Ajeet Pal
    Prodigy 10 points

    Thanks - that was the solution! :)