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