GENERAL DESCRIPTION

The AD8368 is a variable gain amplifier (VGA) with analog linear-in-dB gain control that can be used from low frequencies to 800 MHz. Its excellent gain range, conformance, and flatness are attributed to the Analog Devices, Inc., X-AMP® architecture, an innovative technique for implementing high performance variable gain control.

FEATURES

Analog variable gain range: −12 dB to +22 dB

Linear-in-dB scaling: 37.5 dB/V

3 dB bandwidth: 800 MHz @ VGAIN = 0.5 V

Integrated rms detector

P1dB: 16 dBm @ 140 MHz

Output IP3: 33 dBm @ 140 MHz

Noise figure at maximum gain: 9.5 dB @ 140 MHz

Input and output impedances: 50 Ω

Single-supply voltage from 4.5 V to 5.5 V

RoHS-compliant, 24-lead LFCSP

APPLICATIONS

Complete IF AGC amplifiers

Gain trimming and leveling

Cellular base stations

Point-to-point radio links

RF instrumentation