en.Wedoany.com Reported - Analog Devices Inc. (ADI) has officially launched the ADRF5440 reflective single-pole four-throw (SP4T) RF switch, capable of continuous frequency coverage from 1 GHz to 81 GHz on a single chip, encompassing both microwave and millimeter-wave bands. The device features a switching time of approximately 25 nanoseconds and an RF settling time of 35 nanoseconds. It uses standard CMOS/LVTTL compatible logic control signals, allowing signal path switching to be performed directly by FPGAs, MCUs, or automated test systems without the need for additional level-shifting circuits. It is suitable for antenna switching, test port routing, and signal redirection between multiple signal processing modules.
The packaging design and power consumption performance of the ADRF5440 are both focused on high-density system integration. The device is packaged in a 56-pin flip-chip die form, measuring approximately 2.39 mm × 2.54 mm, with an operating temperature range extending from -40°C to +105°C. All RF ports are internally matched to a 50-ohm characteristic impedance, eliminating the need for additional external matching components. In terms of power consumption, under ±3.3V dual-supply operation, the positive supply rail draws only 145 µA, and the negative supply rail draws 510 µA, resulting in a typical power consumption of approximately 2.2 mW. The device also supports a single-supply 3.3V operating mode, where power consumption can be further optimized, but logic control timing, port-to-port isolation, and power handling capability will be adjusted accordingly. The recommended power supply filtering scheme involves placing a 100 pF bypass capacitor close to each supply pin, with the option to parallel it with a 1 nF capacitor, allowing the designer to further suppress power supply ripple based on the board-level noise environment.
Signal integrity parameters are characterized by frequency sub-bands. In the 1 GHz to 40 GHz band, the typical insertion loss is 1.9 dB, with path-to-path isolation of approximately 39 dB; in the 40 GHz to 67 GHz band, insertion loss increases to 3.0 dB, with isolation around 30 dB; across the full 67 GHz to 81 GHz band, the maximum insertion loss is controlled at 4.0 dB, and isolation is maintained at no less than 20 dB. Compared to ADI's previously mass-produced silicon-based switches such as the ADRF5040 (100 MHz to 44 GHz) and ADRF5026 (100 MHz to 44 GHz), the ADRF5440 extends the usable upper frequency limit of silicon process switches directly from 44 GHz to 81 GHz, nearly doubling the range. The device also meets the design requirement of being free from low-frequency spurs, generating no additional parasitic tones across its entire operating frequency band.
Regarding power handling and linearity, the device's 0.1 dB compression point is approximately 25 dBm, and its third-order intercept point is approximately 47 dBm. It supports an RF input power of 24 dBm in both through-path and hot-switching operating modes, maintaining signal path linearity in high dynamic range systems.
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