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