PRODUCT DESCRIPTION
The AD600 and AD602 dual channel, low noise variable gain amplifiers are optimized for use in ultrasound imaging systems, but are applicable to any application requiring very precise gain, low noise and distortion, and wide bandwidth. Each independent channel provides a gain of 0 dB to +40 dB in the AD600 and –10 dB to +30 dB in the AD602. The lower gain of the AD602 results in an improved signal-to-noise ratio at the output. However, both products have the same 1.4 nV/√Hz input noise spectral density. The decibel gain is directly proportional to the control voltage, is accurately calibrated, and is supplyand temperature-stable.

FEATURES
   Two Channels with Independent Gain Control
      “Linear in dB” Gain Response
   Two Gain Ranges:
      AD600: 0 dB to +40 dB
      AD602: –10 dB to +30 dB
   Accurate Absolute Gain: ±0.3 dB
   Low Input Noise: 1.4 nV/√Hz
   Low Distortion: –60 dBc THD at ±1 V Output
   High Bandwidth: DC to 35 MHz (–3 dB)
   Stable Group Delay: ±2 ns
   Low Power: 125 mW (max) per Amplifier
   Signal Gating Function for Each Amplifier
   Drives High Speed A/D Converters
   MIL-STD-883 Compliant and DESC Versions Available

APPLICATIONS
   Ultrasound and Sonar Time-Gain Control
   High Performance Audio and RF AGC Systems
   Signal Measurement