AD604ARZ

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 300Kohm 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. The very accurate linear-in-dB response of the AD604 is achieved with the differential input exponential amplifier (DSX-AMP) architecture. Typical application includes ultrasound and sonar time-gain controls, high performance AGC systems and signal measurement.

• Ultralow input noise at maximum gain of 0.80nV/√Hz, 3.0pA/√Hz
• 2 independent linear-in-dB channels
• Absolute gain range per channel programmable
• 0dB to 48dB (preamplifier gain = 14dB) through 6dB to 54dB (preamplifier gain = 20dB)
• ±1.0dB gain accuracy, bandwidth of 40MHz (-3dB) and input resistance of 300Kohm
• Variable gain scaling of 20dB/V through 40dB/V and power shutdown at lower end of gain control
• Stable gain with temperature and supply variations and single-ended unipolar gain control
• Drive ADCs directly
• 24 lead WSOIC package
• Operating temperature range from -40°C to 85°C

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ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party