GENERAL DESCRIPTION
The ADL5240 is a high performance, digitally controlled variable gain amplifier (VGA) operating from 100 MHz to 4000 MHz. The VGA integrates a high performance, 20 dB gain, internally matched amplifier (AMP) with a 6-bit digital step attenuator (DSA) that has a gain control range of 31.5 dB in 0.5 dB steps with ±0.25 dB step accuracy. The attenuation of the DSA can be controlled using a serial or parallel interface.

FEATURES
    Operating frequency from 100 MHz to 4000 MHz
    Digitally controlled VGA with serial and parallel interfaces
    6-bit, 0.5 dB digital step attenuator
    31.5 dB gain control range with ±0.25 dB step accuracy
    Gain block amplifier specifications
        Gain: 19.7 dB at 2.14 GHz
        OIP3: 41.0 dBm at 2.14 GHz
        P1dB: 19.5 dBm at 2.14 GHz
        Noise figure: 2.9 dB at 2.14 GHz
    Gain block or digital step attenuator can be first
    Single supply operation from 4.75 V to 5.25 V
    Low quiescent current of 93 mA
    Thermally efficient, 5 mm × 5 mm, 32-lead LFCSP
    The companion ADL5243 integrates a ¼ W driver amplifier to the output of the gain block and DSA

APPLICATIONS
    Wireless infrastructure
    Automated test equipment
    RF/IF gain control