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 Access points, routers, gateways RF_IN RF_OUT Wireless video systems –7 dB S2581 Features Ultra-low Noise Figure 4.9 GHz to 5.9 GHz operation Enable/disable/bypass modes High IIP3 High gain 2.8 V to 3.6 V single-supply operation QFN (6-pin, 1.5 x 1.5 mm) package (MSL1, 260 C per JEDEC J-STD-020) Skyworks Pb-free products are compliant with all applicable legislation. For additional information, refer to Skyworks Definition of Lead (Pb)-Free, document number SQ04-0073. Figure 1. SKY65981-11 LNA Block Diagram Description The SKY65981-11 is an ultra Low-Noise Amplifier (LNA) intended for 5 GHz, IEEE 802.11ac/n wireless receiver applications. Its industry-leading Noise Figure (NF), together with high linearity, make it ideal as a first-stage LNA in IEEE 802.11ac/n Wireless Local Area Network (WLAN) radios. Operating with a single supply voltage, the SKY65981-11 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. The tiny package footprint of the SKY65981-11, requiring only four external components, enables the industry’s smallest PCB area needed to implement a fully-matched 5 GHz LNA. 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 • [email protected] • 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 Technical Description Production quantities of this product are shipped in a standard tape and reel format. The SKY65981-11 is fully matched at 50 Ω 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 SKY65981-11 are provided in Table 2. The recommended operating conditions are specified in Table 3 and electrical specifications are provided in Table 4. Package and Handling Information Instructions on the shipping container label regarding exposure to moisture after the container seal is broken must be followed. Otherwise, problems related to moisture absorption may occur when the part is subjected to high temperature during solder assembly. Performance characteristics for the SKY65981-11 are illustrated in Figures 3 through 9. An application schematic diagram for the SKY65981-11 is shown in Figure 10. The PCB footprint drawing for the SKY65981-11 is provided in Figure 11. Typical part markings are shown in Figure 12. The package dimensions for the 6-pin QFN are shown in Figure 13, and the tape and reel dimensions are provided in Figure 14. The SKY65981-11 is rated to Moisture Sensitivity Level 1 (MSL1) at 260 C. It can be used for lead or lead-free soldering. For additional information, refer to the Skyworks Application Note, Solder Reflow Information, document number 200164. Care must be taken when attaching this product, whether it is 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) Minimum Maximum Units Supply voltage Parameter VCC Symbol 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 • [email protected] • www.skyworksinc.com 2 February 24, 2014 • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • 201632I DATA SHEET • SKY65981-11 5 GHZ LNA Table 3. SKY65981-11 Recommended Operating Conditions (@ +25 °C, VCC = 3.3 V) Parameter Symbol Minimum Typical Maximum Units 0 3.6 V Supply voltage VCC RF frequency range f 5.15 5.85 GHz Operating temperature range TA –40 +85 C DC voltage at control port: High Low VENABLE_H VENABLE_L 1.8 0 3.6 0.2 V V Table 4. SKY65981-11 Electrical Characteristics (Note 1) (VCC = 3.3 V, TA = +25 C, f = 5.15 to 5.85 GHz, VENABLE = 3.3 V, Unless Otherwise Noted) Parameter Symbol Test Conditions Minimum Typical Maximum Units 11 13 dB 0.5 dB Enable Mode (LNA_EN = 3.3 V) Gain |S21| Gain flatness across 80 MHz channel |S21| Out-of-band gain @ 2.462 GHz S21_2.462 –6 Noise Figure NF 1.5 rd dB 1.7 dB 3 Order Input Intercept Point IIP3 +7 dBm In-band 1 dB compression point at input IP1dB –1.5 dBm Out-of-band (2.462 GHz injected signal) 1 dB compression point at input IP1dB +3 dBm Input return loss |S11| ZS/L = 50 7 Output return loss |S22| ZS/L = 50 10 Reverse isolation S12 Maximum RF input (compliant) Maximum RF input (no damage) dB dB –20 dB –10 dBm +10 Drain current ISUBCC Control enable current IEN 12 dBm 15 mA 100 μA Bypass Mode (LNA_EN = 0 V) Gain S21 –7 dB Gain flatness across 80 MHz channel |S21| 0.5 dB Noise Figure NF 1 dB Input Compression Point IP1dB Input return loss |S11| 7 Output return loss |S22| 12 Maximum RF input with harmonic < –50 dBm/MHz (Note 2) Switching speed: LNA to bypass mode and bypass mode to LNA tS 7 dB +18.5 dBm dB dB +11 dBm 300 ns Note 1: Performance is guaranteed only under the conditions listed in this Table. Note 2: Harmonic leakage is measured at RF_IN port. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201632I • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • February 24, 2014 3 DATA SHEET • SKY65981-11 5 GHZ LNA Typical Performance Characteristics +20 +10 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 +15 +10 S-Parameters (dB) S-Parameters (dB) (VCC = 3.3 V, TA = +25 C, f = 4.90 to 5.85 MHz, VENABLE = 3.3 V, Unless Otherwise Noted) S11 S12 S21 S22 0 2 4 6 8 10 14 12 +5 S11 S12 S21 S22 0 –5 –10 –15 –20 –25 –30 4.9 16 5.0 5.1 5.2 Frequency (GHz) 5.3 5.4 5.5 5.6 5.7 5.8 5.9 Frequency (GHz) Figure 3. Broadband S-Parameters vs Frequency (“On” State) Figure 4. Narrow Band S-Parameters vs Frequency (“On” State) 0 0 S-Parameters (dB) S-Parameters (dB) –10 –20 –30 –40 –50 S11 S12 S21 S22 –60 –70 –80 0 2 4 6 8 10 14 12 –5 –10 –15 –20 –30 4.9 16 S11 S12 S21 S22 –25 5.0 Frequency (GHz) 5.3 5.4 5.5 5.6 1.6 1.4 5.8 5.9 4 1.2 1.0 0.8 0.6 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 Frequency (GHz) Figure 7. Noise Figure vs Frequency 5.8 5.9 3 5100 MHz 5180 MHz 5500 MHz 5805 MHz 5850 MHz 2 1 0 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 +1 +2 +3 +4 +5 Output Power (dBm) Figure 8. EVM vs Output Power Over Frequency Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 4 5.7 Figure 6. Narrow Band S-Parameters vs Frequency (Bypass Mode) EVM (%) Noise Figure (dB) 5.2 Frequency (GHz) Figure 5. Broadband S-Parameters vs Frequency (Bypass Mode) 0.4 0.2 0 4.9 5.1 February 24, 2014 • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • 201632I DATA SHEET • SKY65981-11 5 GHZ LNA +9 +8 IP1dB (dBm) +7 +6 +5 +4 +3 +2 +1 0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 Frequency (GHz) Figure 9. IP1dB vs Frequency 1 LNA_EN/BYPASS Control Input 10 pF VCC 2 RF Input RF_IN RF_OUT 3 6 100 pF 5 0.1 μF 2.2 μF VCC RF Output 4 GND GND S2672 Figure 10. SKY65981-11 Schematic Diagram Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201632I • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • February 24, 2014 5 0.53 1.90 0 0.48 DATA SHEET • SKY65981-11 5 GHZ LNA 0.375 Typ. 0.70 3X ø0.25 0.55 0.25 Typ. 6 1 0.500 Typ. 2 5 0 3 4 0.55 0 3 4 2X 1.185 Via Pattern (Note 1) 0 Board Metal 2X ø0.457 2.00 1.90 0.475 Typ. 0.55 6 1 0.40 0.35 Typ. 6 1 0.25 Typ. 0.500 Typ. 0.500 Typ. 1.40 0.375 Typ. 2 5 3 4 1.20 2 5 3 4 62% Solder Coverage on Center Pad Solder Mask Pattern (Note 2) Package Outline Stencil Pattern (Note 3) NOTES: 1. Via hole recommendations: 0.025 mm Cu via wall plating (minimum), via holes to be plated shut or plugged and capped, both sides. 2. Soldermask recommendations: Contact board fabricator for recommended soldermask offset and tolerance. 3. Stencil recommendations: 0.10 mm stencil thickness, laser cut apertures, trapezoidal walls and rounded corners offer better paste release. Dimension and tolerancing according to ASME Y14.5M-1994. Unless specified, dimensions are symmetrical about center lines. All dimensions are in millimeters. Figure 11. SKY65981-11 PCB Layout Footprint (Top View) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 6 February 24, 2014 • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • 201632I S3352 DATA SHEET • SKY65981-11 5 GHZ LNA Pin 1 Indicator Skyworks Part # Figure 12. Typical Part Markings (Top View) C A 1.5 0.02 +0.03/–0.02 B Pin 1 Indicator 0.15 X 45o Pin 1 Ind. Seating Plane 0.70 +0.10/–0.15 2X 0.05 1.5 1.20 +0.10/–0.15 Detail B 0.10 C 2X 6X 3 Detail C 0.08 C 2X 0.10 C Exposed Pad 0.41/0.50 0.10 C Top View Side View Bottom View 6X 0.20 Min 0.175 ± 0.10 0.5 CL 0.25 +0.05/–0.07 5 0.10 C A B 2X R0.05 Detail C Detail B 6 Places All measurements are in millimeters. Dimensioning and tolerancing according to ASME Y14.5M-1994. Coplanarity applies to the exposed heat sink slug as well as the terminals.. Plating requirement per source control drawing (SCD) 2504. Dimension applies to metalized terminal and is measured between 0.15 mm and 0.30 mm from terminal tip. S1350 Figure 13. SKY65981-11 6-Pin QFN Package Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201632I • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • February 24, 2014 7 DATA SHEET • SKY65981-11 5 GHZ LNA Pin 1 4.00 ± 0.10 ϕ1.50± 0.10 2.00 ± 0.05 0.20 ± 0.02 (T) 5o Max A 3.50 ± 0.05 1.78 ± 0.05 (Bo) B A 8.00 +0.30/–0.10 1.75 ± 0.10 B 0.69 ± 0.05 (Ko) ϕ0.50± 0.05 B 5o Max 1.78 ± 0.05 (Ao) A Notes: 1. Carrier tape: black conductive polycarbonate or polystyrene. 2. Cover tape material: transparent conductive PSA. 3. Cover tape size: 5.4 mm width. 4. All measurements are in millimeters. Figure 14. SKY65981-11 Tape and Reel Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 8 February 24, 2014 • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • 201632I S1382a DATA SHEET • SKY65981-11 5 GHZ LNA Ordering Information Model Name SKY65981-11 5 GHz LNA Manufacturing Part Number SKY65981-11 Evaluation Board Part Number SKY65981-11-EK1 Copyright © 2011-2014 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials or the information contained herein. Skyworks may change its documentation, products, services, specifications or product descriptions at any time, without notice. Skyworks makes no commitment to update the materials or information and shall have no responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from any future changes. No license, whether express, implied, by estoppel or otherwise, is granted to any intellectual property rights by this document. Skyworks assumes no liability for any materials, products or information provided hereunder, including the sale, distribution, reproduction or use of Skyworks products, information or materials, except as may be provided in Skyworks Terms and Conditions of Sale. 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Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the Skyworks products could lead to personal injury, death, physical or environmental damage. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any damages resulting from such improper use or sale. Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifications as a result of design defects, errors, or operation of products outside of published parameters or design specifications. Customers should include design and operating safeguards to minimize these and other risks. Skyworks assumes no liability for applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters. Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201632I • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • February 24, 2014 9