rf2052 RF Micro Devices, rf2052 Datasheet - Page 12

• Manufacturer Part Number: rf2052
• Description: High Performance Wideband Rf Synthesizer/vco With Integrated Rf Mixer
• Manufacturer: RF Micro Devices

RF2052
Start-up
When starting from cold REFSTBY=0, REFSTBY should be asserted high approximately 500 μ s before ENABLE is taken high.
This is to allow the XO to settle and will depend on XO characteristics. The various calibration routines will also take some time
depending on whether they are enabled or not. Coarse tuning calibration takes about 50 μ s and VCO tuning gain compensation
takes about 100 μ s. Additionally, time for the PLL to settle will be required. All of these timings will be dependent application
specific factors such as loop filter bandwidth, reference clock frequency, XO characteristics and so on. The fastest turn-on and
lock time will be obtained by leaving REFSTBY asserted high, disabling all calibration routines, and setting the PLL loop band-
width as wide as possible.
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Preliminary
Prelim DS080513