DATA SHEET
SKY73100-11: 865-960 MHz High Performance VCO/Synthesizer
Applications
• 2G, 2.5G, and 3G base station transceivers: − GSM, EDGE, CDMA, WCDMA
• General purpose RF systems
Features
• Frequency operation range: 865 to 960 MHz • Process-tolerant compensation for VCO • 24-bit Σ∆ fractional-N synthesizer • Ultra-fine frequency resolution of 0.001 ppm • Flexible reference frequency selection • Three-wire serial interface up to 20 MHz clock frequency • Integrated PLL supply regulation for spur isolation • MCM (38-pin, 9 x 12 mm) Pb-free free (MSL3, 260 °C per
JEDEC J-STD-020) SMT package
Skyworks offers lead (Pb)-free, RoHS (Restriction of Hazardous Substances) compliant packaging.
Description
Skyworks SKY73100-11 Voltage-Controlled Oscillator (VCO)/Synthesizer is a fully integrated, high performance signal source for high dynamic range transceivers. The device provides ultra-fine frequency resolution, fast switching speed, and low phase noise performance for 2G, 2.5G, and 3G base station transceivers.
The SKY73100-11 VCO/Synthesizer is a key building block for high-performance radio system designs that require low power and a fine step size. Reference clock generators with an output frequency up to 52 MHz can be used with the SKY73100-11. A functional block diagram is shown in Figure 1. As indicated in this diagram, the reference frequency is divided down by 1, 2, 4, or 8 in the R1 divider, depending on the value of the reference divisor input (R1). Refer to the Reference Input Divider section (page 10) for more information.
The SKY73100-11 VCO/Synthesizer is provided in a compact, 38pin Multi-Chip Module (MCM). The device package and pinout are shown in Figure 2. Signal pin assignments and functional pin descriptions are provided in Table 1.
Varactor
Vtune
FREF
7
LD
Lr VCO Out +
Lr
Cal
22
Buffer 2
VCO Out –
7
cap [6:0] Flag
Vtune
PLL Low Pass Filter
SR Out + 2 SR Out –
R1
R1 Divider
SP1 SC1 CPO RF
RF RF Charge PFD Pump
N
3-Wire Serial Interface
PS
Mux (LD/Test)
FN ME
N Divider
P/P+1 Prescaler
ΔΣ Modulator
Divide-by-2
Digital Coarse Calibration
cap [6:0] 7
Calibration Complete
RFIN RFINB
Z = 1:4
RF Output SW_EN
CLK LE DAT
Figure 1. SKY73100-11 Functional Block Diagram
S1040
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 •
[email protected] • www.skyworksinc.com 200361B • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • April 15, 2009
1
DATA SHEET • SKY73100-11 VCO/SYNTHESIZER
GND GND GND VDD GND GND N/C GND GND GND GND N/C CLK GND DATA GND
LE GND
38 37 36 35 34 33 32 31 30
GND 1 GND 2 GND 3 SW_EN 4 GND 5 GND 6 GND 7 GND 8 GND 9 RF_OUT 10
29 GND 28 GND 27 N/C 26 GND 25 GND 24 GND 23 FREF 22 LD 21 N/C 20 GND
11 12 13 14 15 16 17 18 19
S958
Figure 2. SKY73100-11 Pinout– 38-Pin MCM Package (Top View)
Table 1. SKY73100-11 Signal Descriptions
Pin #
Name
Description
1 GND
Ground
2 GND
Ground
3 GND
Gro.