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AFE7422EVM: Mode 7 - VCO Tuning

Part Number: AFE7422EVM
Other Parts Discussed in Thread: AFE7422, LMK04828

Dear Vijay/Team,

We are trying to configure AFE7422 in Mode 7.

Our Required configuration parameters include,

  • LMFSHd - 24410 (Mode 7)
  • Interpolation - 36x
  • Decimation - 12x
  • Required FRef - 153.6 MHz
  • Required DAC Sample Rate - 5529.6 Msps
  • Required ADC Sample Rate - 1843.2 Msps
  • DAC-to-ADC Ratio - 3.

We configured LMK04828 in AFE7422EVB to get 153.6 MHz as our Fref. LMK Locked.

But RF PLL/SERDES PLL is not locked. VCO is centered at 5898.24MHz. We need to fine tune the VCO to 5529.6 Msps.

We also tried to apply the following configuration using AFE74xx GUI.

Can you please suggest us possible way to tune VCO at 5529.6 MHz. Or Please provide cfg file to support the above mentioned parameters.


Preethika S