DATA SHEET SKY85712-21: 5 GHz WLAN Front-End Module Applications 802.11ac networking and personal computing systems PC cards, PCMCIA cards, mini-cards, and half mini-cards WLAN-enabled wireless video systems TX PA VDET ANT Features RX LNA Integrated high-performance 5 GHz PA, LNA with bypass, and T/R switch Fully-matched input and output S2325a Integrated power detector and directional coupler Transmit gain: 27 dB Figure 1. SKY85712-21 Block Diagram Receive gain: 12 dB Output power: +19 dBm 1.8% EVM, HT80, MCS9, 5 V/4.2 V Description Output power: +20 dBm 3% EVM, HT40, MCS7, 5 V/4.2 V The SKY85712-21 is a highly integrated, 5 GHz front-end module Small QFN (16-pin, 3 x 3 mm) package (FEM) incorporating a 5 GHz single-pole, double-throw (SPDT) (MSL3, 260 C per JEDEC J-STD-020) transmit/receive (T/R) switch, a 5 GHz low-noise amplifier (LNA) with bypass, and a 5 GHz power amplifier (PA) intended for mobile/portable 802.11ac applications and systems. TM Skyworks Green products are compliant with The LNA and PA disable functions ensure low leakage current in all applicable legislation and are halogen-free. off mode. An integrated power detector is included to provide For additional information, refer to Skyworks TM closed-loop power control within the system. Denition of Green , document number SQ040074. The device is provided in a compact, 16-pin 3 x 3 mm 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. 16 15 14 13 1 GND 12 GND 2 11 RX VCC2 3 10 GND VCC1 4 9 VDD N/C 5 6 78 Y0007 Figure 2. SKY85712-21 Pinout (Top View) Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 202994I Skyworks Proprietary and Confidential Information Products and Product Information are Subject to Change Without Notice December 3, 2015 1 VDET LNA EN PA EN CRX GND GND TX ANT PA EN LNA EN CRXDATA SHEET SKY85712-21: 5 GHz WLAN FRONT-END MODULE Table 1. SKY85712-21 Signal Descriptions Pin Name Description Pin Name Description 1 GND Ground 9 N/C No connection 2 RX RF receive output 10 VCC1 PA supply voltage 3 GND Ground 11 VCC2 PA supply voltage 4 VDD LNA supply voltage 12 GND Ground 5 VDET Detector output voltage 13 ANT Antenna 6 PA EN PA enable 14 GND Ground 7 GND Ground 15 CRX Switch control voltage 8 TX RF transmit input 16 LNA EN LNA enable Technical Description Electrical and Mechanical Specifications The SKY85712-21 is comprised of a high-performance 5 GHz The absolute maximum ratings of the SKY85712-21 are PA, 5 GHz LNA, and broadband SPDT switch. The device is provided in Table 2. The recommended operating conditions are fully-matched, and requires few external components for specified in Table 3, and electrical specifications are provided in optimal performance, which makes it ideal for small Table 4. portable/mobile applications. The FEM provides up to +27 dB of The state of the SKY85712-21 is determined by the logic gain over the frequency band. The LNA supports an provided in Table 5. enable/disable mode for power savings when not in receive mode and a bypass function for increased receive dynamic range. The PA can be shut off using the PA EN signal (pin 6). The low-loss broadband switch provides the T/R switching function on the SKY85712-21 and has a 1 dB Output Compression Point (OP1dB) of approximately +25 dBm. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 December 3, 2015 Skyworks Proprietary and Confidential Information Products and Product Information are Subject to Change Without Notice 202994I