SKY72302-21 Datasheet, PDF (14/23 Pages) Skyworks Solutions Inc. – SKY72302-21: Spur-Free, 6.1 GHz Dual Fractional-N Frequency Synthesizer

DATA SHEET • SKY72302-21 FREQUENCY SYNTHESIZER
Table 4. Multiplexer Output
Multiplexer Output Select
(Bit 8)
0
0
0
0
1
1
1
1
Multiplexer Output Select
(Bit 7)
0
0
1
1
0
0
1
1
Multiplexer Output Select
(Bit 6)
0
1
0
1
0
1
0
1
Multiplexer Output
(Mux_out)
Reference Oscillator
Auxiliary Reference Frequency (Fref_aux)
Main Reference Frequency (Fref_main)
Auxiliary Phase Detector Frequency (Fpd_aux)
Main Phase Detector Frequency (Fpd_main)
Serial data out
Serial interface test output
Unused
A3 A2 A1 A0 11 10 9 8 7 6 5 4 3 2 1 0
1000X X
0 000
Reserved Bits
Modulation Data Magnitude Offset
Modulation Data Input Select
Modulation Address Disable
C1425
Figure 14. Modulation Control Register (Write Only)
A3 A2 A1 A0 11 10 9 8 7 6 5 4 3 2 1 0
1 0 0 1 MSB
LSB
Figure 15. Modulation Data Register (Write Only)
Modulation Data Bits
C1426
The Modulation Data Register is used to load the modulation data
samples to the modulation unit. These values are transferred to
the modulation unit on the falling edge of F_{pd_main} where they are
passed to the main '6 modulator at the selected magnitude
offset on the next falling edge of F_{pd_main}. Modulation Data Register
values are 2's complement format. As shown in Figure 15, the
value to be loaded is:
x Modulation Data Bits = Modulation data samples that represent
the desired instantaneous frequency offset to the selected main
synthesizer frequency (selected channel) before being affected
by the modulation data magnitude offset.
Package and Handling Information
Since the device package is sensitive to moisture absorption, it is
baked and vacuum packed before shipping. Instructions on the
shipping container label regarding exposure to moisture after the
container seal is broken must be followed. Otherwise, problems
related to moisture absorption may occur when the part is
subjected to high temperature during solder assembly.
The SKY72302-21 is rated to Moisture Sensitivity Level 3 (MSL3)
at 260 qC. It can be used for lead or lead-free soldering.
Care must be taken when attaching this product, whether it is
done manually or in a production solder reflow environment.
Production quantities of this product are shipped in a standard
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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September 9, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 101216L