SKY73013-306 Datasheet, PDF (1/7 Pages) Skyworks Solutions Inc. – Direct Quadrature Demodulator 4.9-5.925 GHz Featuring No-Pull LO Architecture

DATA SHEET
SKY73013-306: Direct Quadrature Demodulator
4.9–5.925 GHz Featuring “No-Pull” LO Architecture
Applications
● _{WiMAX, WLAN receivers}
● _{UNII Band OFDM receivers}
● _{RFID, DSRC applications}
● _{Proprietary radio links}
Functional Block Diagram
Baseband Output
I+ I-
Features
● _{RF is non-integer multiple of LO frequency}
● _{Broadband RF: 4.9–5.925 GHz, LO: 3.268–3.952 GHz,}
IF: DC–100 MHz
● _{Single 3.3 V supply}
● _{Very low LO drive level (-15 dBm)}
● _{High dynamic range, low noise figure}
● _{Excellent linearity and quadrature accuracy—suitable for}
64-QAM OFDM
● _{Low current consumption}
● _{Small 4 x 4 mm 16-lead QFN package}
● _{Available lead (Pb)-free and RoHS-compliant}
RF
Input
LNA
Gain Control
(on/off)
x 3/2
Frequency
Multiplier
2/3 F_RF
Local
Oscillator
Q+ Q-
Baseband Output
Description
The Skyworks SKY73013-306 is an integrated receiver down-
converter subsystem for the 4.9–5.925 GHz band. Its exceptional
dynamic range and quadrature accuracy make this device an
ideal solution for direct conversion and low-IF OFDM and single-
carrier communications systems (including 64-QAM WiMax
and WLAN).
The SKY73013-306 employs an innovative “no-pull” local
oscillator (LO) architecture which offsets the required synthesizer
frequency from that of the receiver center frequency by the
non-integer factor of 3/2. This greatly improves the performance
of direct conversion receiver architecture by eliminating dynamic
DC offsets (caused by LO-RF leakage) and VCO pulling. This
receiver frequency plan is compatible with the 3/2 “no-pull”
modulator frequency plan.
The SKY73013-306 contains a low noise amplifier at the RF
input, the gain of which can be set to a high or low value via the
gain control input. This LNA drives a highly linear quadrature
mixer pair. The quadrature local oscillator signals to these mixer
stages are provided by the 3/2 frequency conversion stage.
The nominal supply voltage for SKY73013-306 is 3.3 V. This part
can operate over the temperature range of -40 °C to 85 °C.
An evaluation board is available upon request.
NEW Skyworks offers lead (Pb)-free, RoHS (Restriction of
Hazardous Substances)-compliant packaging.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
200508 Rev. B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 18, 2006
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