SKY72300-21 Datasheet, PDF (11/23 Pages) Skyworks Solutions Inc. – SKY72300-21: Spur-Free, 2.1 GHz Dual Fractional-N Frequency Synthesizer

DATA SHEET • SKY72300-21 FREQUENCY SYNTHESIZER
A3 A2 A1 A0 11 10 9 8 7 6 5 4 3 2 1 0
0 0 1 1 X X X MSB
LSB
Auxiliary Synthesizer Divider Index
C1420
Figure 9. Auxiliary Divider Register (Write Only)
A3 A2 A1 A0 11 10 9 8 7 6 5 4 3 2 1 0
0 1 0 0 X X MSB
LSB
Auxiliary Synthesizer Dividend
C1421
Figure 10. Auxiliary Dividend Register (Write Only)
Table 2. Programming the Main Reference Frequency Divider
Decimal
Bit 4 (MSB)
Bit 3
Bit 2
0
0
0
0
1
0
0
0
2
0
0
0
—
—
—
—
—
—
—
—
—
—
—
—
31
1
1
1
Bit 1
Bit 0 (LSB)
Reference Divider
Ratio
0
0
1
0
1
2
1
0
3
—
—
—
—
—
—
—
—
—
1
1
32
Table 3. Programming the Auxiliary Reference Frequency Divider
Decimal
Bit 9 (MSB)
Bit 8
Bit 7
0
0
0
0
1
0
0
0
2
0
0
0
—
—
—
—
—
—
—
—
—
—
—
—
31
1
1
1
Bit 6
Bit 5 (LSB)
Reference Divider
Ratio
0
0
1
0
1
2
1
0
3
—
—
—
—
—
—
—
—
—
1
1
32
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
101217N • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • September 11, 2009
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