GENERAL DESCRIPTION
●The AD605 is a low noise, accurate, dual-channel, linear-in-dB variable gain amplifier (VGA), optimized for any application requiring high performance, wide bandwidth variable gain control. Operating from a single 5 V supply, the AD605 provides differential inputs and unipolar gain control for ease of use. Added flexibility is achieved with a user-determined gain range and an external reference input that provide user-determined gain scaling (dB/V).
●FEATURES
● 2 independent linear-in-dB channels
● Input noise at maximum gain: 1.8 nV/√Hz, 2.7 pA/√Hz
● Bandwidth: 40 MHz (–3 dB)
● Differential input
● Absolute gain range programmable
● –14 dB to +34 dB (FBK shorted to OUT) through
● 0 dB to 48 dB (FBK open)
● Variable gain scaling: 20 dB/V through 40 dB/V
● Stable gain with temperature and supply variations
● Single-ended unipolar gain control
● Output common mode independently set
● Power shutdown at lower end of gain control
● Single 5 V supply
● Low power: 90 mW/channel
● Drives ADCs directly
●APPLICATIONS
● Ultrasound and sonar time-gain controls
● High performance AGC systems
● Signal measurement
