AD605ARZ-R7

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 5V supply, it 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). The high performance linear-in-dB response of the AD605 is achieved with the differential input, single-supply, exponential amplifier (DSX-AMP) architecture. Each of the DSX-AMPs comprises a variable attenuator of 0dB to -48.4dB followed by a high speed, fixed-gain amplifier. The attenuator is based on a 7-stage R-1.5R ladder network. Application includes ultrasound and sonar time-gain controls, high performance AGC systems, signal measurement.

• 2 independent linear-in-dB channels
• Typical input voltage noise is 1.8nV/√Hz (TA = 25°C, VS = 5V, RS = 50 ohm, RL = 500 ohm)
• Typical -3dB bandwidth is 40MHz (constant with gain, TA = 25°C, VS = 5V, RS = 50 ohm)
• Differential input
• Typical absolute gain error is +1dB (-14dB to -11dB, 0.25V <lt/> VGN <lt/> 0.40V, TA = 25°C)
• Typical gain scaling factor is 20dB/V (TA = 25°C, VREF = 2.5V, 0.4V <lt/> VGN <lt/> 2.4V)
• Stable gain with temperature and supply variations
• Single-ended unipolar gain control, drives ADCs directly
• Output common mode independently set, power shutdown at lower end of gain control
• 16 lead SOIC-N package, operating temperature range from -40°C to +85°C

Note

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