AD8367

FEATURES Broad-range analog variable gain: −2.5 dB to +42.5 dB 3 dB cutoff frequency of 500 MHz Gain up and gain down modes Linear-in-dB, scaled 20 mV/dB Resistive ground referenced input Nominal ZIN = 200 Ω On-chip, square-law detector Single-supply operation: 2.7 V to 5.5 V APPLICATIONS Cellular base stations Broadband access Power amplifier control loops Complete, linear IF AGC amplifiers High speed data I/O GENERAL DESCRIPTION The AD8367 is a high performance 45 dB variable gain amplifier with linear-in-dB gain control for use from low frequencies up to several hundred megahertz. The range, flatness, and accuracy of the gain response are achieved using Analog Devices’ X-AMP® architecture, the most recent in a series of powerful proprietary concepts for variable gain applications, which far surpasses what can be achieved using competing techniques. The input is applied to a 9-stage, 200 Ω resistive ladder network. Each stage has 5 dB of loss, giving a total attenuation of 45 ...