DATA SHEET SKY65981-11: 5 GHz, 802.11ac/n Low-Noise Amplifier Applications LNA EN/BYPASS VCC IEEE 802.11ac/n WLANs 5 GHz ISM radios Bias SmartPhones Notebooks, netbooks, tablets RF IN RF OUT Access points, routers, gateways Wireless video systems 7 dB S2581 Features Figure 1. SKY65981-11 LNA Block Diagram Ultra-low Noise Figure 4.9 GHz to 5.9 GHz operation Description Enable/disable/bypass modes The SKY65981-11 is an ultra Low-Noise Amplifier (LNA) intended High IIP3 for 5 GHz, IEEE 802.11ac/n wireless receiver applications. Its industry-leading Noise Figure (NF), together with high linearity, High gain make it ideal as a first-stage LNA in IEEE 802.11ac/n Wireless 2.8 V to 3.6 V single-supply operation Local Area Network (WLAN) radios. QFN (6-pin, 1.5 x 1.5 mm) package (MSL1, 260 C per Operating with a single supply voltage, the SKY65981-11 JEDEC J-STD-020) consumes only 12 mA of current. The device includes a bypass mode for near field applications and to save power when the receiver is inactive. Skyworks Pb-free products are compliant with The tiny package footprint of the SKY65981-11, requiring only all applicable legislation. For additional four external components, enables the industrys smallest PCB information, refer to Skyworks Denition of area needed to implement a fully-matched 5 GHz LNA. Lead (Pb)-Free, document number SQ04-0073. A block diagram of the SKY65981-11 is shown in Figure 1. The device package and pinout for the 6-pin Quad Flat No-Lead (QFN) are shown in Figure 2. LNA EN/BYPASS 1 6 VCC RF IN 2 5 RF OUT GND 3 4 GND S2582 Figure 2. SKY65981-11 Pinout 6-Pin QFN Package (Top View) Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 201632I Skyworks Proprietary Information Products and Product Information Are Subject To Change Without Notice February 24, 2014 1 DATA SHEET SKY65981-11 5 GHZ LNA Production quantities of this product are shipped in a standard Technical Description tape and reel format. The SKY65981-11 is fully matched at 50 and requires only a simple bypass circuit on pin 6 (VCC). The bypass/shutdown mode is achieved by switching the LNA EN signal (pin 1) to 0 V. Electrical and Mechanical Specifications Signal pin assignments and functional pin descriptions are described in Table 1. The absolute maximum ratings of the Package and Handling Information SKY65981-11 are provided in Table 2. The recommended Instructions on the shipping container label regarding exposure to operating conditions are specified in Table 3 and electrical moisture after the container seal is broken must be followed. specifications are provided in Table 4. Otherwise, problems related to moisture absorption may occur when the part is subjected to high temperature during solder Performance characteristics for the SKY65981-11 are illustrated assembly. in Figures 3 through 9. The SKY65981-11 is rated to Moisture Sensitivity Level 1 (MSL1) An application schematic diagram for the SKY65981-11 is shown at 260 C. It can be used for lead or lead-free soldering. For in Figure 10. The PCB footprint drawing for the SKY65981-11 is additional information, refer to the Skyworks Application Note, provided in Figure 11. Typical part markings are shown in Solder Reflow Information, document number 200164. Figure 12. The package dimensions for the 6-pin QFN are shown in Figure 13, and the tape and reel dimensions are provided in Care must be taken when attaching this product, whether it is Figure 14. done manually or in a production solder reflow environment. Table 1. SKY65981-11 Signal Descriptions Pin Name Description 1 LNA EN/BYPASS LNA enable (when pulled high) or bypass (when pulled low) control input 2 RF IN LNA RF input 3 GND Ground 4 GND Ground 5 RF OUT LNA RF output 6 VCC Supply voltage for LNA Table 2. SKY65981-11 Absolute Maximum Ratings (Note 1) Parameter Symbol Minimum Maximum Units Supply voltage VCC 0 3.6 V DC voltage at control ports VENABLE 0 3.6 V Power into LNA inputs PIN, LNA +10 dBm Operating temperature TA 40 +85 C Storage temperature TSTG 40 +125 C Note 1: Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other parameters set at or below their nominal values. Exceeding any of the limits listed here may result in permanent damage to the device. CAUTION: Although this device is designed to be as robust as possible, Electrostatic Discharge (ESD) can damage this device. This device must be protected at all times from ESD. Static charges may easily produce potentials of several kilovolts on the human body or equipment, which can discharge without detection. Industry-standard ESD precautions should be used at all times. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 February 24, 2014 Skyworks Proprietary Information Products and Product Information Are Subject To Change Without Notice 201632I