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AD8368 - Linear-in-dB VGA

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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.

The gain range of −12 dB to +22 dB is scaled accurately to 37.5 dB/V with excellent conformance error.

Key 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.

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