RF Amplifiers

This Product Selection Guide contains information to help select products in the RF Amplifier category on DigiKey.com

RF Amplifiers are used for signal gain and buffering purposes in radio frequency applications. They differ from general purpose op amps in that they are typically suitable for use at much higher frequencies and are more inclined to provide a fixed, non-adjustable amount of gain along with input or output impedances of values that match commonly used transmission line characteristic impedance values.


Specifications to determine which RF Amplifier may be right for your application.

Frequency: An RF amplifier will be chosen largely based upon the frequencies it is intended to work with. While some have a wide range (bandwidth) that does come with a cost in terms of power usage, noise, and range when compared to those with a smaller range.

P1dB: 1 dB compression point; the power level at which a device’s gain or transfer function is reduced by 1 dB relative to its small-signal value.

P1dB image

Gain: Describes the amount of signal power gain provided by a device.

Noise Figure: It characterizes SNR degradation caused by a component, given as the ratio (expressed in dB) between actual output noise power and portion thereof that is caused by the thermal noise of the input termination resistance at a standard temperature.

RF Type: The frequncy, interface, or protocol for which the device was designed for use. Typically these standards are set by a third party.

Voltage Supply: Typically represented by a range, this indicates the low and high voltage limits which one can expect standard operation. Voltages outside this range may damage the device and other system components.

Current-Supply: Typically this represents the maximum current to which a device will meet its given specifications. Exceeding this current may damage the device and/or other system components.

Test Frequency: Indicates a frequency or range thereof at which one or more other device parameters is specified or characterized.

Mounting Type: Indicates how the device is attached.

Package/Case: Indicates the type of protective case used on an electronic component to allow easy handling, installation, and protection. This selection was determined to be the closest industry standard applicable to the suppliers device packaging. Typically it is best to check the actual dimensions from the datasheet rather than depend on this terminology when designing your circuit.

Supplier Device Package: This is what the manufacturer calls the package of this device. They are manufacturer specific. It is typically best to use the actual dimensions from the datasheets rather than to go by this terminology when designing your circuit.


Digi-Key Part Number 3157-MAR-8ASM+TR-ND
Manufacturer Mini-Circuits
Manufacturer Product Number MAR-8ASM+
Data Sheet: Click Here

Digi-Key Part Number 1465-1002-ND
Manufacturer MACOM Technology Solutions
Manufacturer Product Number AM-147-PIN
Description IC RF AMP GP 3MHZ-500MHZ TO8
Data Sheet Click Here

Digi-Key Part Number CMPA1D1E025F-ND
Manufacturer Wolfspeed, Inc.
Manufacturer Product Number CMPA1D1E025F
Description IC AMP 13.75GHZ-14.5GHZ 440208
Datasheet Click Here

Schematic Symbol


Schematic symbol courtesy of Scheme-It please see their website for more information and symbols.


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If you have any questions on the specifications for selecting an RF Amplifier, please reply using the button below. If you have questions on a specific RF Amplifier please post those questions in the RF and RFID category.