Analog Devices adds broadband module pair to GaN PA portfolio

Two broadband 6GHz modules have been added by Analog Devices to its power amplifier (PA) range. The pair of high-performance gallium nitride (GaN) power amplifier modules offer one of the highest power-density levels in their class, says the company, minimising size and weight of a subsystem.

The HMC7885 and HMC7748 broadband modules target applications operating between 2.0 and 6.0GHz, including test and measurement, communications, travelling wave tube (TWT) replacement, military/aerospace surveillance and countermeasures, and radar systems. The fully integrated, all solid-state devices expand Analog Device’s existing line of GaN-based PAs, and feature ease of use to accelerate prototyping and system design.

The HMC7885 is a 32W, hermetically sealed, hybrid amplifier housed in a hermetic flange-mount package. It is designed for high-reliability applications. The hybrid amplifier typically provides 21dB of small-signal gain and 45dBm of saturated RF-output power. The HMC7885 draws 2.2A of quiescent current from a 28V DC supply. Both RF input and output are DC blocked and matched to 50 Ohms for ease of use, says Analog Devices. An evaluation board is available with layout and bill of materials to facilitate design-in and user application.

The HMC7748 is an integrated, multi-stage power amplifier module which delivers 25W of saturated output power. It accepts inputs up to -8dBm maximum, and provides small-signal gain of 60dB. It includes bias sequencing and regulation, and is also internally matched to 50 Ohms. This power amplifier draws 0.7A from a 12V supply and up to 4.0A from a 28V supply. The HMC7748 includes an enable pin to provide shutdown capability so the amplifier can be turned on and off without cycling the power supplies.

The GaN power amplifiers can be used in broadband, medium-power applications up to 6.0GHz.

The HMC7885 is offered in an 18-lead hermetic, ceramic/metal multichip module, and the HMC7748 is offered in a six-lead module with a connector interface.



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