HMC391LP4E

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RF Amplifiers: HMC391LP4E application field and working principle

The HMC391LP4E is an ultra low-noise RF amplifier that is a part of the family of ultralow-noise and low-power amplifier devices. This component can be used in applications such as cellular phones, GPS systems, portable radios, and broadcast RF links. The HMC391LP4E offers a combination of features and performance ideal for a wide variety of RF application fields. This includes high linearity, low noise and high dynamic range.

The HMC391LP4E is a monolithic microwave integrated circuit (MMIC) that operates from frequencies between 800 MHz and 3500 MHz. The chip has a power supply voltage of between +3.15V and +3.45V and consumes a maximum of 5 mA of current. It also has a noise figure of as low as 0.5 dB and a gain of 16.8 dB. It has a gain flatness of +/-0.4 dB and a reverse Isolation of 33 dB.

The device is housed in an 8-lead, 1.8 by 1.8 mm surface mount package and is temperature stable from -40° C to +85° C. It is suitable for applications in harsh environments. It is also RoHS compliant.

The working principle of the HMC391LP4E is based on its two stages of amplification. The first stage consists of a low-noise amplifier (LNA)-designed for high gain and low noise. The LNA\'s gain is set up to optimize noise figure and all the other characteristics, such as supply current and flicker noise. The second stage of amplification is a variable gain amplifier (VGA). This has high gain stages and high linearity stages. To optimize the gain, the forward power from the LNA is split, and the remaining portion is preamplified by the VGA.

The HMC391LP4E is a versatile component with performance very suitable for cellular telephones, GPS systems, portable radios, TV/FM receivers, digital broadcast RF links, hands-free car kits and audio applications. The chip provides optimal performance in these applications while being cost-effective. With its exceptional performance and features, the HMC391LP4E is an ideal RF amplifier that is suitable for use in a wide range of RF applications.

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