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Partname:AD8334-EVAL
Description: Ultralow Noise VGAs with Preamplifier and Programmable RIN
Manufacturer:Analog Devices
Datasheet:PDF (867K).
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The AD8331/AD8332/AD8334 are single-, dual-, and quadchannel ultralow noise, linear-in-dB, variable gain amplifiers (VGAs). Optimized for ultrasound systems, they are usable as a low noise variable gain element at frequencies up to 120 MHz. Included in each channel are an ultralow noise preamplifier (LNA), an X-AMP VGA with 48 dB of gain range, and a selectable gain postamplifier with adjustable output limiting. The LNA gain is 19 dB with a single-ended input and differential outputs. Using a single resistor, the LNA input impedance can be adjusted to match a signal source without compromising noise performance. The 48 dB gain range of the VGA makes these devices suitable for a variety of applications. Excellent bandwidth uniformity is maintained across the entire range. The gain control interface provides precise linear-in-dB scaling of 50 dB/V for control voltages between 40 mV and 1 V. Factory trim ensures excellent part-to-part and channel-to-channel gain matching.

Click here to download AD8334-EVAL Datasheet
Click here to download AD8334-EVAL Datasheet
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