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Measurements compared to the Simulation Results from AdiSimPLL

Thread Summary

The user simulated an Integer-N PLL with a single output frequency of 10 GHz using the HMC588 VCO and observed a tuning voltage of 3V in the locked state, which differs from the AdiSimPLL's predicted 2.3405V. The final answer explains that the tuning voltage can vary between VCO parts, and the datasheet values are typical, not guaranteed. No specific workarounds were provided, but the user should expect some variation in tuning voltage.
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Category: Hardware
Product Number: EV--ADF41513

Hello,

i have simulated an Integer-N PLL for single output frequency at 10GHz, for my simulation and for measurements I am using the HMC588 VCO. The report from AdiSimPLL says that i should expect a final tuning-voltage of 2.3405V. When the Pll is in locked state a measure about 3 Volts, so I am about .7V off.

From the datasheet of the HMC588 I would also expect about 3V so why is the AdiSimPLL Simulation so far off?

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