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AD8340 データシート(PDF) 1 Page - Analog Devices

部品番号 AD8340
部品情報  700 MHz to 1000 MHz RF Vector Modulator
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ホームページ  http://www.analog.com
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AD8340 データシート(HTML) 1 Page - Analog Devices

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700 MHz to 1000 MHz
RF Vector Modulator
Data Sheet
AD8340
FEATURES
Cartesian amplitude and phase modulation
700 MHz to 1.0 GHz frequency range
Continuous magnitude control of −2 dB to −32 dB
Continuous phase control of 0° to 360°
Output third-order intercept 24 dBm
Output 1 dB compression point 11 dBm
Output noise floor −149 dBm/Hz at full gain
Adjustable modulation bandwidth up to 230 MHz
Fast output power disable
4.75 V to 5.25 V single-supply voltage
APPLICATIONS
RF PA linearization/RF predistortion
Amplitude and phase modulation
Variable attenuators and phase shifters
CDMA2000, GSM/EDGE linear power amplifiers
Smart antennas
FUNCTIONAL BLOCK DIAGRAM
90°
VPS2
QBBM
QBBP
RFIP
RFIM
DSOP
IBBM
IBBP
RFOP
RFOM
VPRF
CMOP
Figure 1.
GENERAL DESCRIPTION
The AD8340 vector modulator performs arbitrary amplitude
and phase modulation of an RF signal. Because the RF signal
path is linear, the original modulation is preserved. This part
can be used as a general-purpose RF modulator, a variable
attenuator/phase shifter, or a remodulator. The amplitude can
be controlled from a maximum of −2 dB to less than −32 dB,
and the phase can be shifted continuously over the entire 360°
range. For maximum gain, the AD8340 delivers an OP1dB
of 11 dBm, an OIP3 of 24 dBm, and an output noise floor of
−149 dBm/Hz, independent of phase. It operates over a fre-
quency range of 700 MHz to 1.0 GHz.
The baseband inputs in Cartesian I and Q format control the
amplitude and phase modulation imposed on the RF input
signal. Both I and Q inputs are dc-coupled with a ±500 mV
differential full-scale range. The maximum modulation band-
width is 230 MHz, which can be reduced by adding external
capacitors to limit the noise bandwidth on the control lines.
Both the RF inputs and outputs can be used differentially or
single-ended and must be ac-coupled. The RF input and output
impedances are nominally 50 Ω over the operating frequency
range. The DSOP pin allows the output stage to be disabled
quickly to protect subsequent stages from overdrive. The
AD8340 operates off supply voltages from 4.75 V to 5.25 V
while consuming approximately 130 mA.
The AD8340 is fabricated using the Analog Devices, Inc.
proprietary, high performance 25 GHz SOI complementary
bipolar IC process. It is available in a 24-lead RoHS-compliant
LFCSP package and operates over a −40°C to +85°C tempera-
ture range. Evaluation boards are available.
Rev. C
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.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
©2004–2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


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