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-inmagnitude. 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.

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