HMC890LP5E

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The HMC890LP5E is an active filter component developed by HITTITE Microwave Corporation. It operates between DC and 8 GHz, and has a very wide range of applications due to its multiple configuration options, high linearity, and excellent noise figure.

Features

The HMC890LP5E is a fully integrated, low-noise RF filter optimized for high linearity and high performance. It has a low insertion loss of only 0.75 dB, a high gain of 18dB, and a wide 3-dB bandwidth of 4-20 GHz. This is coupled with excellent input/output return loss, typically better than -15dB, which ensures good system-level performance. It also has two internal levels of gain and attenuation control, providing up to 6.2 dB of additional on-chip gain. This feature allows for better dynamic range adjustment and improved out-of-band rejection.

In addition, the HMC890LP5E has a wide corner frequency range and selectable filter responses, from low-pass, high-pass and band-pass, to notch and complex transfer functions. This makes the device ideal for many different applications, including wideband amplification, antenna signal enhancement and wideband signal splitting. The HMC890LP5E also features a low power consumption and wide operating voltage, making it ideal for mobile and automotive applications.

Application Field

The HMC890LP5E is a highly versatile component, and its wide range of applications include:

• RF and microwave switching
• Wideband amplification
• RF signal splitting and combing
• High-power radar applications
• Base station applications
• Wideband transmitters and receivers
• Wireless communication systems
• Cable TV, satellite and terrestrial systems
• Testing and measurement equipment

Working Principle

The HMC890LP5E is a single-pole, double-throw (SPDT) active filter, designed to be configured as a low-noise, high-linearity RF filter, with programmable gain and attenuation. When configured as a low-pass filter, it offers a high level of linearity and low insertion loss, making it an ideal choice for a wide range of RF applications. It can also be configured as a high-pass filter, providing excellent rejection of out-of-band signals.

When configured as a band-pass, notch or complex transfer function filter, the device uses multiple active filter circuits together, along with its low-noise and high linearity amplifier, for a better system-level performance. The HMC890LP5E\'s integrated digital control logic and SPI port allows for easy programming of gain, corner frequency and filter response, which makes it a versatile and easy to use component.

Conclusion

The HMC890LP5E active filter is a great option for applications requiring a wide range of filter responses. With its two onboard levels of gain and attenuation control, along with easy programming via its SPI port, the HMC890LP5E offers an attractive solution for many RF applications. Its low power consumption and high performance make it suitable for a variety of applications, from mobile and automotive, to high power radar and communication systems. All these features, combined with its excellent linearity and low noise figure, make the HMC890LP5E an optimal choice for many RF filter applications.

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