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ADRF6650 Datasheet(PDF) 18 Page - Analog Devices |
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ADRF6650 Datasheet(HTML) 18 Page - Analog Devices |
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18 / 61 page  ADRF6650 Data Sheet Rev. A | Page 18 of 61 PHASE-LOCKED LOOP (PLL) VCC_DVGA_x = 5 V, VCCx = 3.3 V, TA = 27°C, fPFD = 30.72 MHz, fREF = 122.88 MHz, 20 kHz loop filter, measured at the LO output, unless otherwise noted. All losses from input and output traces and baluns are de-embedded from results. –170 –160 –150 –140 –130 –120 –110 –100 –90 –80 –70 –60 –50 –40 –30 –20 –10 0 0.001 0.01 0.1 1 10 100 OFFSET FREQUENCY (MHz) –40°C +27°C +105°C Figure 33. Open-Loop VCO Phase Noise vs. Offset Frequency, fLO = 2350 MHz, fVCO = 4700 MHz –170 –160 –150 –140 –130 –120 –110 –100 –90 –80 –70 –60 –50 –40 –30 –20 –10 0 0.001 0.01 0.1 1 10 100 OFFSET FREQUENCY (MHz) VCO = 4GHz VCO = 4.7GHz VCO = 5.6GHz VCO = 6.8GHz Figure 34. Open-Loop VCO Phase Noise vs. Offset Frequency, for Various VCO Frequencies, Divide by 2 Selected –170 –160 –150 –140 –130 –120 –110 –100 –90 –80 –70 –60 0.001 0.01 0.1 1 10 100 OFFSET FREQUENCY (MHz) Figure 35. Closed-Loop Phase Noise vs. Offset Frequency for fLO = 1565 MHz –170 –160 –150 –140 –130 –120 –110 –100 –90 –80 –70 –60 0.001 0.01 0.1 1 10 100 OFFSET FREQUENCY (MHz) Figure 36. Closed-Loop Phase Noise vs. Offset Frequency for fLO = 1765 MHz –170 –160 –150 –140 –130 –120 –110 –100 –90 –80 –70 –60 0.001 0.01 0.1 1 10 100 OFFSET FREQUENCY (MHz) Figure 37. Closed-Loop Phase Noise vs. Offset Frequency for fLO = 2350 MHz –170 –160 –150 –140 –130 –120 –110 –100 –90 –80 –70 –60 0.001 0.01 0.1 1 10 100 OFFSET FREQUENCY (MHz) Figure 38. Closed-Loop Phase Noise vs. Offset Frequency for fLO = 2720 MHz |
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