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ADL5390ACPZ-WP1 Datasheet(PDF) 1 Page - Analog Devices |
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ADL5390ACPZ-WP1 Datasheet(HTML) 1 Page - Analog Devices |
1 / 24 page RF/IF Vector Multiplier ADL5390 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. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved. FEATURES Matched pair of multiplying VGAs Broad frequency range 20 MHz to 2.4 GHz Continuous magnitude control from +5 dB to −30 dB Output third-order intercept 24 dBm Output 1 dB compression point 11 dBm Output noise floor −148 dBm/Hz Adjustable modulation bandwidth up to 230 MHz Fast output power disable Single-supply voltage 4.75 V to 5.25 V APPLICATIONS PA linearization and predistortion Amplitude and phase modulation Variable matched attenuator and/or phase shifter Cellular base stations Radio links Fixed wireless access Broadband/CATV RF/IF analog multiplexer FUNCTIONAL BLOCK DIAGRAM VPS2 OBBM QBBP INPI INMI DSOP IBBM IBBP RFOP RFOM VPRF CMOP INMQ INPQ CMRF Figure 1. GENERAL DESCRIPTION The ADL5390 vector multiplier consists of a matched pair of broadband variable gain amplifiers whose outputs are summed. The separate gain controls for each amplifier are linear-in- magnitude. If the two input RF signals are in quadrature, the vector multiplier can be configured as a vector modulator or as a variable attenuator/phase shifter by using the gain control pins as Cartesian variables. In this case, the output amplitude can be controlled from a maximum of +5 dB to less than –30 dB, and the phase can be shifted continuously over the entire 360° range. Since the signal paths are linear, the original modulation on the inputs is preserved. If the two signals are independent, then the vector multiplier can function as a 2:1 multiplexer or can provide fading from one channel to another. The ADL5390 operates over a wide frequency range of 20 MHz to 2400 MHz. For a maximum gain setting on one channel at 380 MHz, the ADL5390 delivers an OP1dB of 11 dBm, an OIP3 of 24 dBm, and an output noise floor of −148 dBm/Hz. The gain and phase matching between the two VGAs is better than 0.5 dB and 1°, respectively, over most of the operating range. The gain control inputs are dc-coupled with a +/−500 mV dif- ferential full-scale range centered about a 500 mV common mode. The maximum modulation bandwidth 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 impedance of each VGA RF input is 250 Ω to ground, and the differential output impedance is 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 ADL5390 operates off supply voltages from 4.75 V to 5.25 V while consuming 135 mA. The ADL5390 is fabricated on Analog Devices’ proprietary, high performance 25 GHz SOI complementary bipolar IC process. It is available in a 24-lead, Pb-free CSP package and operates over a −40°C to +85°C temperature range. Evaluation boards are available. |
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