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SKY73112-11 Datasheet(PDF) 2 Page - Skyworks Solutions Inc.

Part # SKY73112-11
Description  750-850 MHz High Performance VCO/Synthesizer With Integrated Switch
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Manufacturer  SKYWORKS [Skyworks Solutions Inc.]
Direct Link  http://www.skyworksinc.com
Logo SKYWORKS - Skyworks Solutions Inc.

SKY73112-11 Datasheet(HTML) 2 Page - Skyworks Solutions Inc.

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DATA SHEET • SKY72300-362 FREQUENCY SYNTHESIZER
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
2
July 30, 2007 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 200731B
The unit operates with a three-wire, high-speed serial interface. A
combination of large bandwidth, fine resolution, and the three-
wire, high-speed serial interface allows for a direct frequency
modulation of the VCO. This supports any continuous phase,
constant envelope modulation scheme such as Frequency
Modulation (FM), Frequency Shift Keying (FSK), Minimum Shift
Keying (MSK), or Gaussian Minimum Shift Keying (GMSK).
This capability can eliminate the need for In-phase and
Quadrature (I/Q) Digital-to-Analog Converters (DACs), quadrature
upconverters, and IF filters from the transmitter portion of the
radio system.
Figure 1 shows a functional block diagram for the SKY72300-362.
The device package and pinout for the 24-pin Quad Flat No-Lead
(QFN) package are shown in Figure 2.
Serial
Interface
Modulation
Unit
Main
Divider
Auxiliary
Divider
Fvco_aux
Fvco_aux
Fvco_main
Fpd_main
Fpd_aux
Fref_main
Fref_aux
Fref
CPout_aux
CPout_main
LD/PSmain
LD/PSaux
Fvco_main
Reference
Frequency
Oscillator
Reference
Frequency
Oscillator
Main
Phase/Freq.
Detector
and
Charge Pump
Auxiliary
Phase/Freq.
Detector
and
Charge Pump
Main
Divider
Auxiliary
Prescaler
Data
Mux
Mod_in
Mux_out
Clock
CS
Fractional
Unit
Fractional
Unit
ΔΣ
18-Bit
ΔΣ
10-Bit
Registers
Modulation
Data
Main
Divider
Modulation
Control
Ref Freq
Dividers
PD/Charge Pump
& Pwr-Dn/Mux Out
Control
Aux
Divider
Main
MSB/LSB
Dividend
Aux
Dividend
Lock Detection or
Power Steering
Lock Detection or
Power Steering
C1447
Figure 1. SKY72300-362 Functional Block Diagram


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