AK1599V Datasheet, PDF (39/41 Pages) Asahi Kasei Microsystems – RF Transmitter for Satellite Communication

15. Appendix
Integrated Phase Noise in fractional / integer mode
[AK1599V]
This graph is example data of one sample.
<Synthesizer setting example>
Measured at 25ºC, VDD2 = VDD3 = 5V
Reference input frequency = 40MHz, 0dBm, R divider = 1, PFD frequency = 40MHz, int = 85 to 105,
frac = 0 to 19, mod = 20
Loop Filter: C1 = 100pF, C2 = 8.2nF, C3 = 100pF, R2 = 1.2k, R3 = 1k
CP1 = 600µA in fractional mode and CP1 = 900µA in integer mode.
Fig. 15 Integrated Phase Noise in fractional / integer mode vs. LO frequency
015006835-E-00
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