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Analog Devices - 700 MHz to 2.7 GHz Quadrature Demodulator

Numéro de référence ADL5382
Description 700 MHz to 2.7 GHz Quadrature Demodulator
Fabricant Analog Devices 
Logo Analog Devices 





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ADL5382 fiche technique
FEATURES
Operating RF and LO frequency: 700 MHz to 2.7 GHz
Input IP3
33.5 dBm @ 900 MHz
30.5 dBm @1900 MHz
Input IP2: >70 dBm @ 900 MHz
Input P1dB: 14.7 dBm @ 900 MHz
www.DataSheeNt4oUis.ceofmigure (NF)
14.0 dB @ 900 MHz
15.6 dB @ 1900 MHz
Voltage conversion gain: ~4 dB
Quadrature demodulation accuracy
Phase accuracy: ~0.2°
Amplitude balance: ~0.05 dB
Demodulation bandwidth: ~370 MHz
Baseband I/Q drive: 2 V p-p into 200 Ω
Single 5 V supply
APPLICATIONS
Cellular W-CDMA/CDMA/CDMA2000/GSM
Microwave point-to-(multi)point radios
Broadband wireless and WiMAX
GENERAL DESCRIPTION
The ADL5382 is a broadband quadrature I-Q demodulator that
covers an RF input frequency range from 700 MHz to 2.7 GHz.
With a NF = 14 dB, IP1dB = 14.7 dBm, and IIP3 = 33.5 dBm at
900 MHz, the ADL5382 demodulator offers outstanding dynamic
range suitable for the demanding infrastructure direct-conversion
requirements. The differential RF inputs provide a well-behaved
broadband input impedance of 50 Ω and are best driven from a
1:1 balun for optimum performance.
Excellent demodulation accuracy is achieved with amplitude and
phase balances ~0.05 dB and ~0.2°, respectively. The demodulated
in-phase (I) and quadrature (Q) differential outputs are fully
buffered and provide a voltage conversion gain of ~4 dB. The
buffered baseband outputs are capable of driving a 2 V p-p
differential signal into 200 Ω.
700 MHz to 2.7 GHz
Quadrature Demodulator
ADL5382
FUNCTIONAL BLOCK DIAGRAM
CMRF CMRF RFIP RFIN CMRF VPX
24 23 22 21 20 19
VPA 1
COM 2
ADL5382
BIAS
GEN
18 VPB
17 VPB
BIAS 3
VPL 4
90°
16 QHI
15 QLO
VPL 5
14 IHI
VPL 6
13 ILO
7 8 9 10 11 12
CML LOIP LOIN CML CML COM
Figure 1.
The fully balanced design minimizes effects from second-order
distortion. The leakage from the LO port to the RF port is
<−65 dBc. Differential dc offsets at the I and Q outputs are typically
<10 mV. Both of these factors contribute to the excellent IIP2
specifications which is >60 dBm.
The ADL5382 operates off a single 4.75 V to 5.25 V supply. The
supply current is adjustable with an external resistor from the
BIAS pin to ground.
The ADL5382 is fabricated using the Analog Devices, Inc.,
advanced Silicon-Germanium bipolar process and is available
in a 24-lead exposed paddle LFCSP.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2008 Analog Devices, Inc. All rights reserved.

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