The SKY5A2105 is a highly integrated, 5.9 GHz front-end module (FEM) incorporating a 5.9 GHz single-pole, quad throw (SP4T) switch, low-noise amplifier (LNA), power amplifier (PA), a band-pass BAW filter (BPF), and a digital step attenuator (DSA) for C-V2X LTE and 5G NR applications and systems.

A BAW bypass state and high gain state in RX and TX mode extends dynamic range in compensator mode. LNA and PA functions are disabled in off mode to insure low leakage current.

An integrated logarithmic power detector is included to provide closed-loop power control over more than 25 dB dynamic range.

In addition, the front-end module offers a temperature sensor function to allow system implementation of reliability or safety algorithms.

A MODE control pin supports either compensator or ECU mode:

In compensator mode, a digital SPI interface controls the DSA from 0 dB to 31.75 dB in 0.25 dB steps.

In ECU mode, a GPIO interface controls the DSA from 0 dB to 31.75 dB in 5 dB steps.

GPIO control pins enable fast switching in both compensator mode and ECU mode.

The device is housed in a compact 24-pin 3 x 5 mm Land Grid Array (LGA) package which may reduce the front-end board space by more than 50 percent.