DATA SHEET SKY85712-21: 5 GHz WLAN Front-End Module PA_EN 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 Features Integrated high-performance 5 GHz PA, LNA with bypass, and T/R switch RX ANT LNA Integrated power detector and directional coupler Transmit gain: 27 dB Receive gain: 12 dB CRX LNA_EN Fully-matched input and output S2325a Figure 1. SKY85712-21 Block Diagram Output power: +19 dBm @ 1.8% EVM, HT80, MCS9, 5 V/4.2 V Output power: +20 dBm @ 3% EVM, HT40, MCS7, 5 V/4.2 V Description Small QFN (16-pin, 3 x 3 mm) package (MSL3, 260 C per JEDEC J-STD-020) The SKY85712-21 is a highly integrated, 5 GHz front-end module (FEM) incorporating a 5 GHz single-pole, double-throw (SPDT) 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. LNA_EN CRX GND ANT Skyworks GreenTM products are compliant with all applicable legislation and are halogen-free. For additional information, refer to Skyworks Definition of GreenTM, document number SQ04–0074. 16 15 14 13 RX 2 11 VCC2 GND 3 10 VCC1 VDD 4 9 N/C 5 6 7 8 TX GND GND 12 PA_EN 1 VDET GND The LNA and PA disable functions ensure low leakage current in off mode. An integrated power detector is included to provide closed-loop power control within the system. 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. Y0007 Figure 2. SKY85712-21 Pinout (Top View) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202994I • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • December 3, 2015 1 DATA SHEET • SKY85712-21: 5 GHz WLAN FRONT-END MODULE Table 1. SKY85712-21 Signal Descriptions Pin Name Description Ground Pin 9 Name N/C Description 1 GND 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 PA, 5 GHz LNA, and broadband SPDT switch. The device is fully-matched, and requires few external components for optimal performance, which makes it ideal for small portable/mobile applications. The FEM provides up to +27 dB of gain over the frequency band. The LNA supports an 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 absolute maximum ratings of the SKY85712-21 are provided in Table 2. The recommended operating conditions are specified in Table 3, and electrical specifications are provided in Table 4. The state of the SKY85712-21 is determined by the logic provided in Table 5. 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 • [email protected] • www.skyworksinc.com 2 December 3, 2015 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 202994I DATA SHEET • SKY85712-21: 5 GHz WLAN FRONT-END MODULE Table 2. SKY85712-21 Absolute Maximum Ratings (Note 1) Parameter Symbol Supply voltage VCC1, VCC2 Supply voltage VDD DC input on control pins (PA_EN, LNA_EN, CRX) VIN Minimum Maximum Units –0.3 +6.0 V +6.0 V –0.3 +3.6 V Input power (50 Ω load) PIN +10 dBm Supply current ICC 400 mA Storage temperature TST +150 C Junction temperature TJ 170 C 1000 V –40 Electrostatic discharge: Human Body Model (HBM), Class 1C 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 value. 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. Table 3. SKY85712-21 Recommended Operating Conditions (Note 1) Minimum Typical Maximum Units Supply voltage Parameter VCC1, VCC2, VDD Symbol 3.9 5.0 5.5 V Control logic: High Low VIH VIL 2.5 0 3.6 0.4 V V Operating temperature TOP –40 +85 C Note 1: During production test, devices will be tested at 5 V. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202994I • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • December 3, 2015 3 DATA SHEET • SKY85712-21: 5 GHz WLAN FRONT-END MODULE Table 4. SKY85712-21 Electrical Specifications (1 of 2) (VCC = VDD = 5 V, Unless Otherwise Specified, TOP = 25 °C, Unless Otherwise Noted) (Note 1) Parameter Frequency range Symbol f Test Condition Main frequency band Min Typical 5.15 Max Units 5.85 GHz 31 dB +0.5 dB Transmit Mode Gain G Gain flatness 24 Over any 40 MHz bandwidth Output power POUT 27 –0.5 With –45 dB EVM source, VCC = 5.0 V: MCS9, HT80, 1.8 % DEVM, AT off MCS7, HT40, 3 % DEVM, AT off MCS0, mask compliance +17 +18 +21 +19 +20 +24 dBm dBm dBm +19 +20 +24 dBm dBm dBm With –45 dB EVM source, VCC = 4.2 V: MCS9, HT80, 1.8 % DEVM, AT off MCS7, HT40, 3 % DEVM, AT off MCS0, mask compliance Current consumption 2nd and 3rd harmonics ITOT 2fo, 3fo Modulated signal: Idle current, VEN = 0 @ Quiescent @ +19 dBm @ +20 dBm @ +22 dBm 20 230 275 300 330 +22 dBm MCS0 35 μA mA mA mA mA –50 dBm/MHz –25 dBm All spurious +22 dBm OFDM, 6 Mbps –28 Isolation From ANT to either TX or RX pin 40 dB Input return loss |S11| 7 10 dB Output return loss |S22| 10 12 dB VCC1 = VCC2 = VDD = 5.0 V: @ No RF @ +19 dBm @ +23 dBm 0.30 0.75 1.05 V V V VCC1 = VCC2 = VDD = 4.2 V: @ No RF @ +19 dBm @ +23 dBm 0.3 0.7 1.0 V V V Power detector output: Power detector output impedance ZOUT_DET PA enable current IENABLE Ruggedness RU RF output = –30 dBm Maximum input power at which PA can survive 10:1 mismatch with no permanent damage. 700 Ω 0.5 mA +10 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 4 December 3, 2015 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 202994I dBm DATA SHEET • SKY85712-21: 5 GHz WLAN FRONT-END MODULE Table 4. SKY85712-21 Electrical Specifications (2 of 2) (VCC = VDD = 5 V Unless Otherwise Specified, TOP = 25 °C, Unless Otherwise Noted) (Note 1) Parameter Symbol Test Condition Min Typical Max 12 16 Units Receive Mode Gain G 1 dB Input compression point IP1dB 9 LNA active LNA bypass Gain step 19 Gain flatness Over any 40 MHz bandwidth Noise figure NF Input return loss |S11| Output return loss |S22| Third order input intercept point IIP3 Switching time tSW dB –5 +10 21 –0.25 2.7 LNA active LNA bypass dBm dBm 23 dB +0.25 dB 3.0 dB 6 10 5 dB dB 8 dB +8 dBm LNA ↔ bypass 200 ns RX ↔ TX： From 10% ↔ 90% power change of rising or falling edge, state 1 400 ns 15 mA LNA enable current 10 μA CRX enable current 10 μA 20 μA LNA bias current IDD Idle current IIDLE 11 State 1 Receive Bypass Mode Insertion loss |S21| –9 dB Note 1: Performance is guaranteed only under the conditions listed in this table. Table 5. SKY85712-21 Logic State CRX (J5, Pin 15) LNA_EN (J5, Pin 16) (Note 1) PA_EN (J5, Pin 6) (Note 2) All off (switch in TX mode) 1 0 0 0 WLAN receive 2 1 1 0 WLAN receive bypass mode 3 1 0 0 WLAN transmit 4 0 0 1 Mode Note 1: LNA is on while LNA_EN is high. LNA is off and in bypass mode when LNA_EN is low. Note 2: PA_EN controls only the PA. It does not control the switch. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202994I • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • December 3, 2015 5 DATA SHEET • SKY85712-21: 5 GHz WLAN FRONT-END MODULE Evaluation Board Description Circuit Design Considerations The SKY85712-21 Evaluation Board is used to test the performance of the SKY85712-21 FEM. A suggested application schematic diagram is shown in Figure 3. A photograph of the Evaluation Board is shown in Figure 4. Table 6 provides the Bill of Materials (BOM) list for Evaluation Board components. The following design considerations are general in nature and must be followed regardless of final use or configuration: Evaluation Board Setup Procedure 1. Connect system ground to pin 2 of the J4 header and to pin 2 of the J5 header. 2. Apply 5 V to pins 1 and 3 of the J4 header and to pin 3 of the J5 header. 3. Select a path according to the information in Table 5: L=0V H = 3.3 V 4. Connect a DMM to pin 12 of the J5 header to monitor the power detector voltage. Paths to ground should be made as short as possible. The ground pad of the SKY85712-21 has special electrical and thermal grounding requirements. This pad is the main thermal conduit for heat dissipation. Because the circuit board acts as the heat sink, it must shunt as much heat as possible from the device. Therefore, design the connection to the ground pad to dissipate the maximum wattage produced by the circuit board. Multiple vias to the grounding layer are required. NOTE: A poor connection between the ground pad and ground increases junction temperature (TJ), which reduces the life of the device. Place component C7 close to pin 11. Place component C6 close to pin 10. The ANT port is DC-blocked and does not require a DC blocking capacitor. There is no DC present on the RX port. This pin needs to be DC-blocked with a general purpose 4.7 pF capacitor if there is > 2.6 V DC on the trace connecting to the RX port. There is no DC present on the TX port. This pin needs to be DC-blocked with a general purpose 4.7 pF capacitor if there is > 3.2 V DC on the trace connecting to the TX port. Each VCC pin needs to be individually decoupled as shown in the Evaluation Board schematic. Place C7 close to pin 11. Place C6 close to pin 10. VCC1 and VCC2 should not be shorted together at the device pins. Refer to the layout for details. The DNI components and 0 Ω resistors can be eliminated. The ANT and LNA OUT trace losses are 0.18 dB. The TX IN trace losses are 0.22 dB. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 6 December 3, 2015 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 202994I DATA SHEET • SKY85712-21: 5 GHz WLAN FRONT-END MODULE VDD VDD J5 J5 J5 J4 1 2 3 LEN 4 5 6 7 8 9 CRX 10 11 12 VCC2 VCC1 × PEN VDET 1 2 3 4 5 6 7 8 J3 RF Output VDD 5 1 RX GND 2 GND 3 VDD 4 VDET VDET LNA_EN 6 PEN PA_EN CRX GND GND TX ANT 15 CRX L1 1.3 nH 13 10 11 GND N/C 9 VCC2 8 VCC1 J1 LEN 14 7 RF Input 16 C19 0.3 pF J2 Antenna C20 0.3 pF 12 × VCC1 VCC2 R6 33 Ω (see BOM for details) Note: C6 0.22 μF C7 47000 pF 0 Ω resistors and DNI components are not shown in schematic. Y1576 Figure 3. SKY85712-21 Application Schematic Figure 4. SKY85712-21 Evaluation Board Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202994I • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • December 3, 2015 7 Table 6. SKY85712-21 Evaluation Board Bill of Materials Component Value Size Vendor Mfr Part Number Description C6 0.22 μF 0402 Murata GRM155R60J224KE01 Multilayer ceramic C7 47000 pF 0402 Murata GRM155R71E473KA88 Multilayer ceramic R6 33 Ω when VCC = 5 V 0 Ω when VCC = ≤ 4.2 V 0402 Panasonic ERJ2GEJ330 Thick film chip resistor C19, C20 0.3 pF 0402 Murata GJM1555C1HR30BB01 Multilayer ceramic L1 1.3 nH 0402 Murata LQG15HN1N3S02D High-frequency multilayer Note: 0 Ω resistors and DNI components are not shown in the Bill of Materials. Package Dimensions Package and Handling Information The PCB layout footprint for the SKY85712-21 is shown in Figure 5. Typical part markings are shown in Figure 6. Package dimensions for the 16-pin QFN are shown in Figure 7, and tape and reel dimensions are provided in Figure 8. Since the device package is sensitive to moisture absorption, it is baked and vacuum packed before shipping. 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. The SKY85712-21 is rated to Moisture Sensitivity Level 3 (MSL3) 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. Production quantities of this product are shipped in a standard tape and reel format. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202994I • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • December 3, 2015 8 1.95 16 15 14 13 1 3X 0 3X 0.60 3.40 14 3X 0.60 DATA SHEET • SKY85712-21: 5 GHz WLAN FRONT-END MODULE 1 12 12 3X 0.60 3.40 2 11 3 10 4 9 3X 0 1.95 0 3 3X 0.60 0.53 Typ. 6 7 0.500 Typ. 8 0 5 0.250 Typ. Board Metal Via Pattern (Note 1) 3.50 3.40 0.73 Typ. 1.85 16 15 9X ∅0.254 7 14 1 0.20 Typ. Component Outline 13 12 16 15 14 13 1 12 0.73 Typ. 2 11 2 11 3 10 3 10 4 9 4 9 3.50 1.85 3.40 0.20 Typ. 0.63 Typ. 5 6 0.500 Typ. 7 0.53 Typ. 5 8 0.350 Typ. 6 7 0.500 Typ. Solder Mask Pattern (Note 2) 8 0.250 Typ. Stencil Pattern (Note 3) 61% solder coverage on center pad Notes: 1. Via hole recommendations: 0.025 mm Cu via wall plating (minimum), solder mask on the far side should tent or plug via holes. 2. Solder mask recommendations: Contact board fabricator for recommended solder mask offset and tolerance. 3. Stencil recommendations: 0.125 mm stencil thickness, laser cut apertures, trapezoidal walls and rounded corners offer better paste release. 4. Dimensions and tolerances according to ASME Y14.5M-1994. 5. Unless specified, dimensions are symmetrical about center lines. 6. All dimensions are in millimeters. S3179 Figure 5. SKY85712-21 PCB Layout Footprint (Top View) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202994I • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • December 3, 2015 9 DATA SHEET • SKY85712-21: 5 GHz WLAN FRONT-END MODULE Pin 1 Indicator Skyworks Part Number Y0266 Lot Code Figure 6. Typical Part Markings (Top View) 3.00 ± 0.05 A 0.55 ± 0.05 0.05 C 1.955 ± 0.05 0.152 Ref B 0.02 + 0.03 –0.02 R 0.20 Pin 1 Indicator Pin 1 Indicator Exposed Pad 3.00 ± 0.05 1.955 ± 0.05 3X R0.10 16X 0.20 Min 0.05 C 2X 16X 0.05 C C Top View Seating Plane 2X 0.05 C 0.50 Detail A 4 NOTES: 1. All measurements are in millimeters. 2. Dimensioning and tolerancing according to ASME Y14.5M-1994. 3. Unless otherwise specified, the following values apply: Decimal Tolerance: Angular Tolerance: X.X (1 place) ± 0.1 mm ± 0.5° X.XX (2 places) ± 0.05 mm X.XXX (3 places) ± 0.025 mm 4. Coplanarity applies to the terminals as well as other bottom surface metallization. 5. Dimension applies to metallized terminal. If terminal tip has a radius, dimension should not be measured in that radius area. 6. Unless specified, dimensions are symmetrical about center lines. Bottom View Detail A 0.27 ± 0.05 0.25 ± 0.05 5 Scale: 2X 16 Places 0.10 M C A B 0.05 M C Figure 7. SKY85712-21 Package Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 10 December 3, 2015 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 202994I Y0267 DATA SHEET • SKY85712-21: 5 GHz WLAN FRONT-END MODULE 0.80 ± 0.1 (Ko) 3.30 ± 0.1 (Bo) Re f 3° . CL B Po 4.00 ± 0.1 (Note 2) E1 1.75 ± 0.1 Pin 1 Location ∅1.5 Min. (D1) A B 8.00 ± 0.1 (P1) 12.00 ± 0.3 0.30 ± 0.05 (T) P2 2.00 ± 0.1 (Note 1) 5.50 ± 0.1 (Note 1) ∅1.55 ± 0.05 (Do) 3.30 ± 0.1 (Ao) Section B Ref. R0.6 Notes: 1. 2. 3. 4. Measured from center line of sprocket hole to center line of pocket. Cumulative tolerance of 10 sprocket holes is ± 0.20 mm. Other material available. Typical ESD surface resistivity is from 105 to 1011 Ohms/square per EIA, JEDEC tape and reel specification. 5. All measurements are in millimeters. f. Re .50 R0 f. Re .35 R0 Detail A S2615 Figure 8. SKY85712-21 Tape and Reel Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202994I • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • December 3, 2015 11 DATA SHEET • SKY85712-21: 5 GHz WLAN FRONT-END MODULE Ordering Information Model Name SKY85712-21: 5 GHz WLAN Front-End Module Manufacturing Part Number SKY85712-21 Evaluation Board Part Number SKY85712-EK1 Copyright © 2013-2015 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. 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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 and the Skyworks symbol 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 12 December 3, 2015 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 202994I