AD604
FEATURES
Ultralow input noise at maximum gain 0.80 n V/√Hz, 3.0 p A/√Hz
2 independent linear-in-d B channels Absolute gain range per channel programmable
0 d B to 48 d B (preamplifier gain = 14 d B) through 6 d B to 54 d B (preamplifier gain = 20 d B)
±1.0 d B gain accuracy Bandwidth: 40 MHz (- 3 d B) Input resistance: 300 kΩ Variable gain scaling: 20 d B/V through 40 d B/V Stable gain with temperature and supply variations Single-ended unipolar gain control Power shutdown at lower end of gain control Drive ADCs directly
APPLICATIONS
Ultrasound and sonar time-gain controls High performance AGC systems Signal measurement
GENERAL DESCRIPTION
The AD604 is an ultralow noise, very accurate, dual-channel, linear-in-d B variable gain amplifier (VGA) optimized for timebased variable gain control in ultrasound applications; however, it supports any application requiring low noise, wide bandwidth, variable gain control. Each channel of the AD604 provides a 300 kΩ input resistance and unipolar gain control for...
