DATA SHEET SKY12208-478LF: 0.02 to 2.7 GHz 50 W High Power Silicon PIN Diode SPDT Switch Applications ANT Transmit/receive and fail-safe switching in land mobile radios, public safety radios, and military communication systems TX RX Features High power handling: 50 W CW, 300 W peak Low insertion loss: 0.3 dB typical Controlled with positive power supply Exposed RX BIAS Paddle High antenna to receive isolation: 45 dB typical Bias driver circuit available on request S2403 Small, QFN (16-pin, 4 x 4 mm) Pb-free package (MSL1, 260 C per JEDEC J-STD-020) Figure 1. SKY12208-478LF Block Diagram Skyworks Green products are compliant with Description all applicable legislation and are halogen-free. The SKY12208-478LF is a high power handling, Single-Pole, For additional information, refer to Skyworks Double-Throw (SPDT) silicon PIN diode switch. The device can Denition of Green, document number cover two frequency bands, 0.02 to 0.70 GHz or 0.05 to 2.7 GHz, SQ04-0074. by changing the value of an RF choke in the SMT bias network. The different Evaluation Board components for each band are noted in Table 10. The SKY12208-478LF features low insertion loss, excellent power handling, and superb linearity with low DC power consumption. The device is well-suited for use as a high power transmit/receive switch in a variety of telecommunication systems. The device is provided in a 4 x 4 mm, 16-pin Quad Flat No-Lead (QFN) package. A functional block diagram is shown in Figure 1. The pin configuration and package are shown in Figure 2. Signal pin assignments and functional pin descriptions are provided in Table 1. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 201671D Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice January 27, 2014 1 DATA SHEET SKY12208-478LF: 50 W PIN DIODE SPDT SWITCH 16 15 14 13 1 12 GND N/C ANT 2 11 N/C 3 10 GND N/C 4 9 N/C RX BIAS 5 6 78 S2401 Figure 2. SKY12208-478LF Pinout 16-Pin QFN (Top View) Table 1. SKY12208-478LF Signal Descriptions Pin Name Description Pin Name Description 1 GND Ground. Must be connected to ground using 9 RX BIAS RF ground port and DC bias input port lowest possible impedance. 2 ANT Antenna RF port and DC bias input port 10 N/C No connection 3 GND Ground. Must be connected to ground using 11 N/C No connection lowest possible impedance. 4 N/C No connection 12 N/C No connection 5 N/C No connection 13 GND Ground. Must be connected to ground using lowest possible impedance. 6 GND Ground. Must be connected to ground using 14 TX Transmit RF input port and DC bias input lowest possible impedance. port 7 RX Receive output port and DC bias input port 15 GND Ground. Must be connected to ground using lowest possible impedance. 8 GND Ground. Must be connected to ground using 16 N/C No connection lowest possible impedance. The state of the SKY12208-478LF is determined by the logic Electrical and Mechanical Specifications provided in Table 8. Table 9 provides the logic for use with the The absolute maximum ratings of the SKY12208-478LF are SKY12208-478LF Evaluation Board. provided in Table 2. Recommended operating conditions are specified in Table 3 and electrical specifications are provided in Power derating data is plotted against temperature in Figures 19 Table 4 (28 V bias 0.25 GHz), Table 5 (5 V bias 0.25 GHz), and 20. Equivalent circuit diagrams for transmit and receive are Table 6 (5 V bias 2.0 GHz), and Table 7 (28 V bias 2.0 GHz). shown in Figure 21. Typical performance characteristics of the SKY12208-478LF are illustrated in Figures 3 through 8 (0.25 GHz) and Figures 9 through 18 (2.0 GHz). Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 January 27, 2014 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice 201671D N/C N/C GND GND RX TX GND GND