HMC641LC4

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RF switches play an essential role in signal flow in a wide range of applications. HMC641LC4 is one of the most popular RF switches featured by Skyworks, offering multiplexer performance and wide bandwidth, low ON-state resistance and high isolation for high-speed sampling applications. The device is suitable for applications such as phased array radar and satellite communications.

The HMC641LC4 is a SP4T (Single Pole Four Throw) non-reflective absorptive RF switch that operates in the frequency range of 400 MHz – 6 GHz. It offers wideband operation with a nominal insertion loss of 4 dB and an excellent ON-state resistance of 0.2 Ω. The device exhibits high isolation of 53 dB at 6 GHz, which makes it well suited for applications that require high isolation between different ports.

The HMC641LC4 operates with a supply voltage of +2.7/-2.7 VDC. Its low supply voltage and very low current consumption (<0.1 µA) makes it an ideal choice for portable applications that require low power consumption. This RF switch also includes ESD protection on all control and RF ports.

The operating principle of the HMC641LC4 is based on a MEMS (Micro Electro-Mechanical System) Switch technology developed by Skyworks. The switch consists of a series of suspended piezoelectric layers that move in response to an electrical input. These layers control the flow of electrical energy between the contacts and the substrate, thus allowing for switching between different RF paths. In the off-state, the flow of current is blocked between the contacts and the substrate and no RF energy is allowed to pass.

The MEMS switch also includes a high impedance isolator that prevents current leakage in the off-state and helps prevent crosstalk between the different RF paths. In addition, a high-precision temperature compensator ensures that the device operates over a wide temperature range (-40 to +85°C).

The HMC641LC4 is an ideal switching solution for a variety of high-speed sampling applications such as phased-array radar systems, satellite communications systems, and other RF applications in which high isolation between RF ports is desirable. It can also be used in signal jamming and suppression applications.

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