RF Amplifiers

Analog Devices driver amplifiers are available in a wide range of medium power general purpose amplifiers covering the frequency range from 400 MHz (IF) to RF microwave and W-Band (86 GHz). These driver amplifiers include output powers from 15 dBm up to approximately 1 watt while covering various frequencies, bandwidths and gain levels. Most designs are internally matched to 50 Ohms with designs that include both bare die and packaged parts. All Analog Devices driver amplifiers are fully specified over frequency, temperature, and supply voltage.

Fully differential amplifiers from Analog Devices offer precision DC specs and are designed to better reject high frequency PSRR and CMRR through their differential input and output architectures. The differential input and output also offer system improvement by reducing the total harmonic distortion received by the ADC. Differential amplifiers allow the process of single-ended input to complementary differential outputs or differential inputs to differential outputs. These amplifiers offer low distortion to drive precision and high speed analog-to-digital converters (ADCs). Analog Devices fully differential amplifiers are configured for both precision and high speed and come with a VOCM pin, providing a critical but convenient solution when interfacing with analog-to-digital converters (ADCs). This provides a convenient solution when interfacing with ADCs. Differential outputs allow twice the output signal of conventional amplifiers, to get the most signal on low supplies.

Gain block amplifiers are used in industrial applications, wireless infrastructure, aerospace and defense. Analog Devices offer a large family of Gain Block amplifiers covering DC to 15 GHz (IF to RF microwave). The devices are internally matched to 50 ohms at the input and output for ease of use. These gain block amplifiers have output power ranging from 5 dBm up to approximately 1 watt while covering various bandwidths and gain levels. All Analog Devices gain block amplifiers are fully specified over frequency, temperature, and supply voltage.

Analog Devices low noise amplifiers cover the frequency range from DC (IF) to RF Microwave and W-Band (95 GHz). These MMIC-based designs cover various gains and bandwidths with noise figures as low as 0.7 dB. Our low noise amplifiers offer some of the lowest noise and highest linearity available in the industry. Many of the designs offer a self-biased topology, and are internally matched to 50 ohms. They are used in a wide range of applications including telecom, instrumentation, and military/aerospace. All Analog Devices low noise amplifiers are fully specified over frequency, temperature, and supply voltage.

Low Phase Noise amplifiers are critical for many applications requiring high signal integrity. This is especially relevant in instrumentation, defense, and telecommunication applications where low phase noise amplifiers are becoming increasingly important as the oscillators improve. Phase noise is described as the close-in noise to the carrier that can often appear as jitter on a clock signal. Analog Devices offers a large portfolio of low phase noise amplifiers to meet a variety of requirements in the LO network, receiver, as well as in the transmitter. Our portfolio supports a wide range of power levels and frequencies to provide the right solution for the given application.

Analog Devices power amplifiers are based in GaN and GaAs semiconductor technology spanning kilohertz to 95GHz. In addition to bare die and surface mount components, our portfolio also includes GaN-based power amplifier modules with output power exceeding 8 kW. Designed for excellent linearity at high output power, our power amplifiers maintain good heat dissipation and high reliability at elevated temperatures for a wide variety of wired and wireless applications. Many of the power amplifiers cover decades of bandwidths supporting instrumentation and military applications with a single IC. There are numerous narrowband products supporting both telecommunication and satellite communication links as well. The large selection of products offers the ability to choose the right product for the application.

RF amplifier bias controllers generate a regulated drain voltage and actively adjusts the gate voltage of an external amplifier to achieve constant bias current. It can be used to bias any enhancement and depletion type amplifier operating in Class-A regime with drain voltages (VDRAIN) as specified. These devices achieve excellent bias stability over supply, temperature and process variations, and eliminates the required calibration procedures used to prevent RF performance degradation due to such variations.

Analog Devices offers RF Front-End ICs for phased array antenna solutions. These RF Front-End ICs are placed right at the antenna element and can quickly switch between transmit and receive functions in radar applications. The power amplifier on the transmit side is highly efficient operating in short pulse durations. The low noise amplifier on the receive side has a low noise figure with high linearity so that it won’t distort the incoming return signal. The RF Front-End IC also incorporates a high performance switch to toggle between the transmit and receive paths. Highly integrated planar phased array antennae need small form factor solutions, and Analog Devices has integrated the switch, low noise amplifier, and power amplifier into a small surface mount package as well as the decoupling capacitors, providing an optimal solution.

Analog Devices GaAs MMIC-based wideband distributed amplifiers cover the dc to 65 GHz frequency range in various ultrawide bandwidths. Our design catalog includes low noise amplifiers, power amplifiers, and driver amplifier designs to meet your needs in applications such as electronic warfare, radar, electronic countermeasures, optical applications, and instrumentation. To meet diverse design requirements, some of our LNAs also offer internal-self biasing that requires only a signal drain voltage to operate.