HMC424LH5TR RF/IF and RFID

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Attenuation Value:	31.5dB
Frequency Range:	0Hz ~ 13GHz
Power (Watts):	180mW
Impedance:	50 Ohms
Package / Case:	12-SMD, No Lead
Base Part Number:	HMC424

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Introduction to Attenuators

Attenuators are electronic components used in many different types of circuits to reduce the amplitude of an electrical signal by a predetermined amount. Attenuators are often used in audio, video, and radio circuits to reduce the level of input signals and prevent overload of the circuits. In addition, attenuators are used in power control circuits to reduce the currents and voltages delivered to components.

HMC424LH5TR Attenuator Application and Working Principle

The HMC424LH5TR is a low noise, absorptive SPST mMIMO (Multiple Input, Multiple Output) RF switch attenuator, designed for use in high-performance, low-noise applications. This switch attenuator operates from DC up to 4GHz and can be used in any number of applications, such as Cellular/CellSite, DAS, Satcom/VSAT, WiMAX/LTE, RF Signal Conditioning, and Antenna Tuning and Optimization. The HMC424LH5TR switch attenuator has a low insertion loss of 2.2dB over the entire frequency band of DC up to 4GHz, with an amazingly low 0.3dB insertion loss at 2.5GHz. The switch attenuator provides excellent isolation of 40dB across the entire frequency range. The switch is also capable of supporting high isolation of 20dB up to 10GHz. Additionally, this switch attenuator offers superior linearity performance, with a typical IIP3 of ~27dBm at 1GHz. The switch offers low power consumption, with a typical power consumption of 8.5mW at 3V.The working principle of the HMC424LH5TR switch attenuator is quite simple. The switch attenuator consists of two SPST (Single Pole, Single Throw) switches connected in series, along with an absorbing resistor. The switches can be controlled separately, or they can be controlled together, depending on the application. For example, in a cellular/cell site application, the switches can be used to adjust the power level of each antenna, or to switch between different antennas. In a power control circuit, the switches can be used to adjust the voltage or current delivered to a load, while the absorbing resistor dissipates excess energy as heat. The resistance value of the absorbing resistor determines how much signal amplitude is reduced. By adjusting the resistance value, the signal attenuation can be adjusted over a range of 20dB.

Conclusion

The HMC424LH5TR is an ideal solution for a variety of attenuator applications, from antenna tuning and optimization, to signal conditioning for RF systems. It offers low insertion loss and high isolation, as well as superior linearity performance and low power consumption. The switch attenuator also provides an adjustable attenuation range of 20dB for power control applications. By controlling the resistance value of the absorbing resistor, the signal amplitude can be reduced by up to 20dB. The HMC424LH5TR switch attenuator is an excellent choice for a variety of low noise, high performance attenuator applications.

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