The AD604 is an ultralow noise, very accurate, dual-channel, linear-in-dB variable gain amplifier (VGA) optimized for time-based 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 300k? input resistance and unipolar gain control for ease of use. User determined gain ranges, gain scaling (dB/V), and dc level shifting of output further optimize performance.
- Two independent linear-in-dB channels
- ±1.0dB gain accuracy
- 40MHz (-3dB) bandwidth
- 300k? input resistance
- 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
