GENERAL DESCRIPTION

The AD8366 is a matched pair of fully differential, low noise and low distortion, digitally programmable variable gain amplifiers (VGAs). The gain of each amplifier can be programmed separately or simultaneously over a range of 4.5 dB to 20.25 dB in steps of 0.25 dB. The amplifier offers flat frequency performance from dc to 70 MHz, independent of gain code.

FEATURES

Matched pair of differential, digitally controlled VGAs

Gain range: 4.5 dB to 20.25 dB

0.25 dB gain step size

Operating frequency

DC to 150 MHz (2 V p-p)

3 dB bandwidth: 600 MHz

Noise figure (NF)

11.4 dB at 10 MHz at maximum gain

18 dB at 10 MHz at minimum gain

OIP3: 45 dBm at 10 MHz

HD2/HD3

Better than −90 dBc for 2 V p-p output at 10 MHz at

maximum gain

Differential input and output

Adjustable output common-mode

Optional dc output offset correction

Serial/parallel mode gain control

Power-down feature

Single 5 V supply operation

APPLICATIONS

Baseband I/Q receivers

Diversity receivers

Wideband ADC drivers

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