SKY72301-22 Datasheet, PDF (19/21 Pages) Skyworks Solutions Inc. – Spur-Free, 1.0 GHz Dual Fractional-N Frequency Synthesizer

To Microprocessor
DATA SHEET • SKY72301-22 FREQUENCY SYNTHESIZER
3V
RF Out Main
J1
1
543 2
3V
VCC
3 ^VCC
Lock
Main
Detect
Output
<
2
C3
1 nF
R1
100 kΩ
3V
C11
1 nF
GND ⁴
1 _{Main VCO}
R4
C14
C15
R5
C16
100 pF
C17
Main Synthesizer Loop Filter
1
Clock
2
Mod_in
3 _{Mux_out}
4
VSUBdigital
5
GNDecl/cml
6
VCCcml_main
C5
7
Fvco_main
C7
8 _{Fvco_main}
9 _LD/PSmain
10 _{VCCcp_main}
11 _{CPout_main}
12
GNDcp_main
13
Xtalacgnd/OSC
14
Xtalin/OSC
C19
28
CS
27
Data
VCCdigital ²⁶
25
GNDdigital
24
VCCcml_aux
23
Fvco_aux
22
Fvco_aux
GNDcp_aux ²¹
CPout_aux ²⁰
VCCcp_aux ¹⁹
LD/PSaux ¹⁸
17
GNDxtal
16
VCCxtal
15
Xtalout/NC
External Pad
Connection to
Ground
Y1
3V
C2
1 nF
3V
C1
1 nF
RF Out Auxiliary
J1
1
A
C4
C6
3V
3V
C10
1 nF
2
Auxiliary
VCO
4 _GND
C8
R2
R3
C12
VCC
VCC ³
1
C9
C17
1 nF
Auxiliary Synthesizer Loop Filter
C18
3 V _R6
100 kΩ
>
Lock Detect
Auxiliary Output
C1427
Figure 16. SKY72301-22 Application Schematic
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
200706B • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • May 21, 2007
19