The ADL5243 is a high performance digitally controlled variable gain amplifier operating from 100 MHz to 4000 MHz. The VGA integrates two high performance amplifiers and a digital step attenuator (DSA). Amplifier 1 is a 20 dB gain internally matched amplifier, and amplifier 2 is a broadband ? W driver amplifier. The DSA is 6-bit with 31.5 dB gain control range, 0.5 dB steps, and ±0.25 dB step accuracy. The attenuation of the DSA can be controlled using a serial or parallel interface.

The ADL5243 consumes just 195 mA and operates off a single supply ranging from 4.75 V to 5.25 V. The VGA is packaged in a thermally enhanced 5 mm × 5 mm 32-lead LFCSP, and is fully specified for operation from -40°C to +85°C. A fully populated evaluation board is available.