AK1544 Datasheet, PDF (33/37 Pages) Asahi Kasei Microsystems – 1300MHz Integer-N Frequency Synthesizer

[AK1544]
14. Typical Evaluation Board Schematic
AK1544
100pF
2
REFIN
CP
220nF
VREF
Loop Filter
R3
C1 _R2'
R2
C3
SWIN
CPZ
BIAS
27k
RFINP
RFINN
C2
100pF
51
100pF
RFOUT
100pF
18
VCO
18
18
Fig. 14 Typical Evaluation Board Schematic
The input voltage from the [CPZ] pin is used in the internal circuit. The [CPZ] pin must not be open even when the fast
lockup feature is unused. For the output destination from the [CPZ] pin, see “P.12 Fig.5 Loop Filter Schematic”. The
[SWIN] pin could be open even when the fast lockup feature is not used.
MS1350-E-01
33
2013/03