Amplifiers

Analog Devices’ specially designed active filter products can accommodate any frequency response (low-pass, high-pass, or band-pass) and a wide range of frequencies. Our line of continuous time and switched capacitor filters provides simple, flexible frequency discrimination solutions.

Analog Devices delivers a broad portfolio of high-performance amplifier-based front-end solutions—from 5G massive MIMO receiver ICs and Hall effect sensors to variable reluctance sensor interfaces and precision analog front ends—engineered to simplify design, enhance accuracy, and ensure robust performance across demanding applications. Our highly integrated 5G receiver front ends reduce external components and development time, while our magnetic and rotational sensing solutions offer exceptional stability, noise immunity, and high-temperature tolerance for automotive and industrial systems. With flexible, space-saving architectures and turnkey evaluation tools, ADI enables faster time to market and superior reliability in applications ranging from advanced wireless infrastructure to battery testing and monitoring.

Our audio amplifiers deliver audiophile performance with proven analog and digital technology. Analog Devices offers a wide range of audio products, including industry-leading microphone preamps, microphone drivers, line drivers, and receivers. ADI’s audio amplifier products also include Class-A, Class-B, and Class-D offerings, along with a breadth of power ICs. Our Class-D amplifiers are among the lowest power and lowest distortion in the industry. Analog Devices amplifier products have been used in many high volume consumer products where the highest audio quality is expected. The lowest power consumption also enables this performance in many battery powered applications as well. The deep technical knowledge of our experts on audio amplifiers is also available to help you fine tune your design to meet your specifications.

A comparator is used to compare a measurable quantity with a reference or standard such as two voltages or currents. It outputs a digital signal showing the results. Analog Devices offers an extensive portfolio of high speed and low power comparators and this allows us to provide our customers with more complete signal chain solutions. Our comparator offerings range from the fastest Si-based comparator on the market today to very low power CMOS comparators that consume only microamperes of power. Find the right comparators for your application with our selection tool and design tool.

Analog Devices’ current mirrors are precision, high dynamic range, wide variable supply parts used for optical power monitoring, voltage biasing with current monitoring, and voltage-to-current conversion. Our portfolio of precision resistor networks is designed to deliver excellent ratiometric stability, making them ideal for high precision applications such as difference amplifiers, voltage references, and bridge circuits, while our dual and quad transistors offer outstanding matching characteristics, including low offset voltages, minimal temperature drift, and tight hFE matching.

Analog Devices’ current sense amplifiers offer excellent performance for a wide array of automotive, motor control, and power management applications. These devices accurately amplify small voltages in the presence of large common-mode voltages and provide high bandwidth, as well as level shifting and bidirectional capability. Excellent DC and AC accuracy over a wide temperature range from –40°C to +125°C minimizes errors in your measurement loop while not sacrificing on cost and package size.

A difference amplifier is a special purpose amplifier designed to measure differential signals, otherwise known as a subtractor. A key feature of a difference amplifier is its ability to remove unwanted common mode signals, known as common mode rejection (CMR). Unlike most types of amplifiers, difference amplifiers are typically able to measure voltages beyond the supply rails, and are used in applications where large dc or ac common-mode voltages are present. They are ideal for current and voltage monitoring. Analog Devices offers a range of difference amplifiers, optimized for low distortion, low power, or high voltage performance.

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 ADCs, and come with a VOCM pin that provides a critical but convenient solution when interfacing with ADCs.

Analog Devices instrumentation amplifiers (in-amps) are precision gain blocks that have a differential input and an output that may be differential or single-ended with respect to a reference terminal. These devices amplify the difference between two input signal voltages while rejecting any signals that are common to both inputs. The in-amps are widely used in many industrial, measurement, data acquisition, and medical applications where dc precision and gain accuracy must be maintained within a noisy environment, and where large common-mode signals (usually at the ac power line frequency) are present.

A linear multiplier/divider is a device that produces an output voltage or current that is proportional to the product of two or more independent input voltages or currents. In addition to multiplying and dividing, multipliers can perform squaring, square-rooting, and modulation functions. Applications include radar, communications, and industrial controls where a real-time response is required. Analog Devices offers the widest selection of linear multipliers and dividers.

Analog Devices offers a broad portfolio of high performance RF amplifiers, including low noise amplifiers (LNAs), power amplifiers, and gain blocks. Our LNAs cover DC to 95 GHz with industry-leading low noise figures and high linearity, ideal for telecom, instrumentation, and aerospace applications. Our power amplifiers and gain blocks offer high output power, thermal reliability, and ease of integration across a wide range of wired, wireless, and military systems.

The operational amplifier (op amp) is an important part of any analog signal chain, often working as a crucial part of the interface between sensors and our world-leading ADCs. Common analog op amp functions include gain, buffering, filtering, and level-shifting. Analog Devices’ portfolio provides the broadest choice of op amps in the industry, delivering unmatched quality, robustness, and performance to enable optimized solutions in automotive, industrial, consumer, and healthcare markets. Explore op amps by parameters and find expert system-level advice on design problems with our reference designs (Circuits from the Lab®), design tools, selection guides, filter design, calculators, and LTSpice®/SPICE models for operational amplifiers.

Rms-to-DC converters manufactured by Analog Devices are used in a wide variety of applications where precision and low power measurement of AC signals is the prime objective. An ADI Rms-to-DC converter offers real-time measurements, meaning there are no latency issues such as those that limit the frequency response of other technologies—the DC output is simply the equivalent of the rms input, over a wide range of input frequencies, and for complex waveforms not limited to sine waves. ADI offers a wide range of rms-to-DC converters optimized for the most demanding performance, power, and cost applications, satisfying true rms needs.

Analog Devices offers a portfolio of sample-and-hold amplifiers that combine speed with precision. ADI sample-and-hold amplifiers can acquire a signal in 700 ns and hold it with a droop rate of 0.01 µV/µs. These devices are up to 14-bit accurate, with low aperture jitter and output impedance, and they are available in commercial, industrial, and military temperature ranges.

Analog Devices’ transimpedance amplifiers (TIAs) offer a complete, high performance, single-chip solution for converting current to voltage. Our TIAs feature low input referred noise current, high input current, and low power dissipation. These TIAs and voltage converting amplifiers are used in a variety of applications including optical power measurement, wide range baseband logarithmic compression, measurement of current and voltage ratios, and optical absorbance measurements.

Variable gain amplifiers (VGAs) are used in a variety of remote sensing and communications equipment. Variable gain amplifiers deliver unmatched performance for signal chains that require high dynamic range. Applications ranging from ultrasound, radar, LIDAR, wireless communications, and speech analysis have utilized VGAs to deliver industry leading performance.