AD605BR

The Analog Devices AD605BR is a dual-channel, low-noise, single-supply variable gain amplifier (VGA) designed for high-performance applications requiring wide bandwidth variable gain control. Operating from a single 5 V supply, it features differential inputs and a unipolar gain control for ease of use.

Key electrical specifications include a bandwidth of 40 MHz (−3 dB), a maximum gain of 34 dB, and an input noise spectral density of 1.8 nV/√Hz at maximum gain. The device offers programmable gain ranges from -14 dB to +34 dB or 0 dB to +48 dB, and variable gain scaling from 20 dB/V to 40 dB/V. It consumes a low power of 90 mW/channel and operates with a supply voltage range of 4.5 V to 5.5 V.

The AD605BR is housed in a 16-SOIC package and is designed for surface mount applications. Its stable gain with temperature and supply variations, along with its ability to drive ADCs directly, makes it suitable for applications such as ultrasound and sonar time-gain controls and high-performance AGC systems.

This VGA provides independent control for each of its two channels, offering flexibility in signal processing designs. The output common mode is independently settable, and power shutdown is available at the lower end of the gain control.