GENERAL DESCRIPTION

The AD8370 is a low cost, digitally controlled, variable gain amplifier (VGA) that provides precision gain control, high IP3, and low noise figure. The excellent distortion performance and wide bandwidth make the AD8370 a suitable gain control device for modern receiver designs.

FEATURES

Programmable low and high gain (<2 dB resolution)

Low range: −11 dB to +17 dB

High range: 6 dB to 34 dB

Differential input and output

200 Ω differential input

100 Ω differential output

7 dB noise figure @ maximum gain

Two-tone IP3 of 35 dBm @ 70 MHz

−3 dB bandwidth of 750 MHz

40 dB precision gain range

Serial 8-bit digital interface

Wide input dynamic range

Power-down feature

Single 3 V to 5 V supply

APPLICATIONS

Differential ADC drivers

IF sampling receivers

RF/IF gain stages

Cable and video applications

SAW filter interfacing

Single-ended-to-differential conversion

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