Datasheet ADL5390 (Analog Devices)

RF/IF Vector Multiplier Data Sheet ADL5390 FEATURES FUNCTIONAL BLOCK DIAGRAM Matched pair of multiplying VGAs VPRF QBBP OBBM VPS2 Broad frequency range 20 MHz to 2.4 GHz Continuous magnitude control from +5 dB to −30 dB INMQ Output third-order intercept 24 dBm INPQ RFOP Output 1 dB compression point 11 dBm CMRF RFOM Output noise floor −148 dBm/Hz INPI Adjustable modulation bandwidth up to 230 MHz INMI Fast output power disable Single-supply voltage 4.75 V to 5.25 V CMOP IBBP IBBM DSOP
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APPLICATIONS
Figure 1.
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 GENERAL DESCRIPTION
The gain control inputs are dc-coupled with a ±500 mV differential The ADL5390 vector multiplier consists of a matched pair of full-scale range centered about a 500 mV common mode. The broadband variable gain amplifiers whose outputs are summed. maximum modulation bandwidth is 230 MHz, which can be The separate gain controls for each amplifier are linear-in- reduced by adding external capacitors to limit the noise bandwidth magnitude. If the two input RF signals are in quadrature, the on the control lines. vector multiplier can be configured as a vector modulator or as Both the RF inputs and outputs can be used differentially or a variable attenuator/phase shifter by using the gain control pins single-ended and must be ac-coupled. The impedance of each as Cartesian variables. In this case, the output amplitude can be VGA RF input is 250 Ω to ground, and the differential output controlled from a maximum of +5 dB to less than –30 dB, and impedance is nominally 50 Ω over the operating frequency the phase can be shifted continuously over the entire 360° range. range. The DSOP pin allows the output stage to be disabled Since the signal paths are linear, the original modulation on the quickly to protect subsequent stages from overdrive. The inputs is preserved. If the two signals are independent, then the ADL5390 operates off supply voltages from 4.75 V to 5.25 V vector multiplier can function as a 2:1 multiplexer or can while consuming 135 mA. provide fading from one channel to another. The ADL5390 is fabricated on Analog Devices’ proprietary, The ADL5390 operates over a wide frequency range of 20 MHz high performance 25 GHz SOI complementary bipolar IC to 2400 MHz. For a maximum gain setting on one channel at process. It is available in a 24-lead, Pb-free CSP package and 380 MHz, the ADL5390 delivers an OP1dB of 11 dBm, an OIP3 operates over a −40°C to +85°C temperature range. Evaluation of 24 dBm, and an output noise floor of −148 dBm/Hz. The gain boards are available. and phase matching between the two VGAs is better than 0.5 dB and 1°, respectively, over most of the operating range.
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Document Outline Features Applications Functional Block Diagram General Description Table of Contents Revision History Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics General Structure Theory of Operation Noise and Distortion Applications Information Using the ADL5390 RF Input and Matching RF Output and Matching Driving the I-Q Baseband Gain Controls Interfacing to High Speed DACs Generalized Modulator Vector Modulator Vector Modulator Example—CDMA2000 Quadrature Modulator RF Multiplexer Evaluation Board Outline Dimensions Ordering Guide