MC145202 데이터 시트보기 (PDF) - Motorola => Freescale

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MC145202

Low-Voltage 2.0 GHz PLL Frequency Synthesizer Includes On-Board 64/65 Prescaler

Motorola => Freescale 

fR

REFERENCE

REFin ÷ R

fV

FEEDBACK

fin ÷ (N x 64 + A)

PDout

VH

VL

VH

VL

*

SOURCING CURRENT

FLOAT

SINKING CURRENT

VH

φR

VL

VH

φV

VL

VH

LD

VL

VH = High voltage level

VL = Low voltage level

*At this point, when both fR and fV are in phase, the output source and sink circuits are turned on for a short interval.

NOTE: The PDout either sources or sinks current during out–of–lock conditions. When locked in phase and frequency, the output is in

the floating condition and the voltage at that pin is determined by the low–pass filter capacitor. PDout, φR, and φV are shown with

the polarity bit (POL) = low; see Figure 14 for POL.

Figure 17. Phase/Frequency Detectors and Lock Detector Output Waveforms

MC145202

16

MOTOROLA

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