GENERAL DESCRIPTION

The AD8264 is a quad, linear-in-dB, general-purpose variable gain amplifier (VGA) with a preamplifier (preamp), and a flexible differential output buffer. DC coupling, combined with wide bandwidth, makes this amplifier a very good pulse processor.

FEATURES

Low noise

Voltage noise: 2.3 nV/√Hz

Current noise: 2 pA/√Hz

Wide bandwidth

Small signal: 235 MHz (VGAx); 80 MHz (output amplifier)

Large signal: 80 MHz (1 V p-p)

Gain range

0 to 24 dB (input to VGA output)

6 to 30 dB (input to differential output)

Gain scaling: 20 dB/V

DC-coupled

Single-ended input and differential output

Supplies: ±2.5 V to ±5 V

Low power: 140 mW per channel at ±3.3 V

APPLICATIONS

Multichannel data acquisition

Positron emission tomography

Gain trim

Industrial and medical ultrasound

Radar receivers