DATA SHEET SKY65388-11: 695 to 866 MHz Variable Gain Amplifier Applications Description WCDMA base stations Femto cells The SKY65388-11 is a high linearity, Variable Gain Amplifier (VGA) module. The device includes an input amplifier driver, a Variable Voltage Attenuator (VVA), and an output Power Amplifier (PA). The two amplifiers and voltage attenuator are optimized for superior ACLR performance with WCDMA signals. Features Frequency range: 695 to 866 MHz High gain: >25 dB Attenuation range: > 30 dB OP1dB: >+26 dBm ACLR < –68 dBc for POUT = +8 dBm Single DC supply: +5 V The high linearity (high OP1dB, OIP3, and ACLR) and high efficiency of this device make it ideal for use at the final stage (or close to the final stage) of a WCDMA transmit chain. Small MCM (12-pin, 8.385 x 8.385 mm) SMT package (MSL3, 260 C per JEDEC J-STD-020) The SKY65388-11 VGA uses low-cost Surface Mount Technology (SMT) in the form of a compact, 8 x 8 mm 12-pin Multi-Chip Module (MCM), which allows for a highly manufacturable low-cost solution. 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. The output of the first PA (PA1) is matched to the input of the VVA. The output of the VVA is matched to the input of the second PA (PA2). The RF_IN and RF_OUT signals (pins 1 and 8, respectively) are both internally matched, including DC blocking capacitors. 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. VCTRL RF_IN Input Match PA1 PA2 Output Match RF_OUT Variable Attenuator S2326 Figure 1. SKY65388-11 Block Diagram Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202691C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • February 6, 2014 1 VCC_AMP1 12 11 VCC_AMP2 GND DATA SHEET • SKY65388-11: VARIABLE GAIN AMPLIFIER 10 GND GND 2 8 RF_OUT VCTRL 3 7 GND 4 5 6 GND 9 GND 1 GND RF_IN S2328 Figure 2. SKY65388-11 Pinout – 12-Pin MCM (Top View) Table 1. SKY65388-11 Signal Descriptions Pin Name Description Pin Name Description 1 RF_IN RF input 7 GND Ground 2 GND Ground 8 RF_OUT RF output 3 VCTRL Variable attenuator control voltage 9 GND Ground 4 GND Ground 10 VCC_AMP2 Voltage supply for PA2 (after the variable voltage attenuator) 5 GND Ground 11 VCC_AMP1 Voltage supply for PA1 (before the variable voltage attenuator) 6 GND Ground 12 GND Ground Electrical and Mechanical Specifications The absolute maximum ratings of the SKY65388-11 are provided in Table 2. The recommended operating conditions are specified in Table 3 and electrical specifications are provided in Table 4. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 2 February 6, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 202691C DATA SHEET • SKY65388-11: VARIABLE GAIN AMPLIFIER Table 2. SKY65388-11 Absolute Maximum Ratings (Note 1) Parameter Supply voltage Control voltage Symbol Minimum Maximum Units VCC_AMP1, VCC_AMP2 5.5 V VCTL 5.0 V RF output power (CW) POUT +26 dBm Operating case temperature TC –40 +85 C Storage case temperature TSTG –55 +125 C Junction temperature TJ +150 C Thermal resistance θJC 27 C/W 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. 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. SKY65388-11 Recommended Operating Conditions Parameter Symbol Frequency range f RF output power (CW) POUT Supply voltage, measured at terminals of Evaluation Board VCC_AMP1, VCC_AMP2 Variable voltage attenuator control range VCTRL Ruggedness, load VSWR with no permanent damage PMAX_LOAD Operating case temperature TC Minimum Typical 695.5 4.75 0 –40 5.00 Maximum Units 865.5 MHz +8 dBm 5.25 V 3.3 V 8:1 – +85 C Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202691C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • February 6, 2014 3 DATA SHEET • SKY65388-11: VARIABLE GAIN AMPLIFIER Table 4. SKY65388-11 Electrical Specifications (Note 1) (VCC_AMP1 = VCC_AMP2 = 5 V, VCTRL = 0 V, f = 780.5 MHz, TC = +25 C, Characteristic Impedance [ZO] = 50 Ω, Unless Otherwise Noted) Parameter Symbol Frequency range f Small signal gain |S21| Main band gain flatness 26 695.5 to 865.5 MHz ATTN_RANGE CW, VCTRL = 0 ~ 3.3 V OP1dB CW 3rd Order Output Intercept Point OIP3 PTONE = +8 dBm, Δf = 1 MHz ACLR Typical 695.5 CW Output 1dB Compression Point Adjacent Channel Leakage Ratio Min 758 to 803 MHz Extended band gain flatness Attenuation control range Test Condition Max Units 865.5 MHz 29 dB 0.32 0.50 1.15 1.50 dB dB 28 34 dB +24.5 +26 dBm +40 +43 dBm WCDMA, test mode 1, POUT = +8 dBm –70 –68.0 dBc 4.5 6.0 dB Noise Figure NF At maximum gain Input return loss |S11| Measured at 695 MHz and 865.5 MHz 10 15 dB Output return loss |S22| Measured at 695 MHz and 865.5 MHz 10 15 dB Quiescent current IQ No RF Maximum VSWR for stable operation VSWR_MAX CW 285 Operating current IOP POUT = +12 dBm, CW 330 8:1 mA – 290 330 mA Note 1: Performance is guaranteed only under the conditions listed in this Table. Evaluation Board Description The Skyworks SKY65388-11 Evaluation Board is used to test the performance of the SKY65388-11 VGA. An Evaluation Board schematic diagram is provided in Figure 3. An assembly drawing for the Evaluation Board is shown in Figure 4 and the layer detail is provided in Figure 5. The layer detail physical characteristics are noted in Figure 6. Capacitors C1, C2, and C3 provide DC bias decoupling and RF bypass for VCC_AMP1 (pin 11). Capacitors C4, C5, and C6 provide DC bias decoupling and RF bypass for VCC_AMP2 (pin 10). Capacitor C7 provides decoupling for VCTRL (pin 3). Pins 1 and 8 are the RF input and output signals, respectively. Pins 2, 4, 5, 6, 7, 9, 12, and the package backside metal are ground pins that provide the DC, RF, and thermal ground. Circuit Design Configurations The following design considerations are general in nature and must be followed regardless of final use or configuration. Proper isolation must be provided between the VCC_AMP1 and VCC_AMP2 pins. Paths to ground should be made as short as possible. The ground pad of the SKY65388-11 VGA has special electrical and thermal grounding requirements. This pad is the main thermal conduit for heat dissipation. Since the circuit board acts as the heat sink, it must shunt as much heat as possible from the amplifier. As such, design the connection to the ground pad to dissipate the maximum wattage produced to the circuit board. Multiple vias to the grounding layer are required. Filled or capped vias are recommended. It is recommended that the layout for the VCC_AMP1 and VCC_AMP2 signals follow what is shown in Figure 4. The VCC_AMP1 and VCC_AMP2 traces can be tied together to share the same power supply. The connecting node should not be placed close to the package pins. The connecting node should be connected closer to components C1 and C4 (see Figure 3). This is to provide isolation between VCC_AMP1 and VCC_AMP2. NOTE: Junction temperature (Tj) of the device increases with a poor connection to the ground pad and ground. This reduces the life of the device. Testing Procedure Use the following procedure to set up the SKY65388-11 Evaluation Board for testing: 1. Connect a 5.0 V supply to the VCC_AMP1 and VCC_AMP2 pins. Connect the VCTRL signal to a power supply and set the power supply to 0 V. If available, enable the current limiting function of the power supply to 450 mA. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 4 February 6, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 202691C DATA SHEET • SKY65388-11: VARIABLE GAIN AMPLIFIER related to moisture absorption may occur when the part is subjected to high temperature during solder assembly. 2. Connect a signal generator to the RF signal input port. Set it to the desired RF frequency at a power level of –20 dBm or less to the Evaluation Board but do NOT enable the RF signal. THE SKY65388-11 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, PCB Design & SMT Assembly/Rework Guidelines for MCM-L Packages, document number 101752. 3. Connect a spectrum analyzer to the RF signal output port. 4. Enable the power supply. 5. Enable the RF signal. 6. Take measurements. 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. CAUTION: If any of the output signals exceed the rated maximum values, the SKY65388-11 Evaluation Board can be permanently damaged. Package Dimensions Package and Handling Information The PDB footprint drawing for the SKY65388-11 is shown in Figure 7. Package dimensions for the 12-pin MCM are shown in Figure 8, and tape and reel dimensions are provided in Figure 9. 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 J3 2 VCTRL VDD 1 VCC 4-Header 11 GND 12 J1 1 RF Input RF_IN 10 VCC_AMP2 3 VCC_AMP1 4 C3 22 pF C2 1000 pF C1 10 μF C6 22 pF C5 1000 pF C4 10 μF PA1 Voltage Supply PA2 Voltage Supply 9 GND J2 8 2 GND 3 7 GND 4 5 GND VCTRL GND C7 1000 pF GND Variable Attenuator Control Voltage RF Output RF_OUT 6 S2329 Figure 3. SKY65388-11 Evaluation Board Schematic Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202691C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • February 6, 2014 5 DATA SHEET • SKY65388-11: VARIABLE GAIN AMPLIFIER J3 J1 J2 S2330 Figure 4. SKY65388-11 Evaluation Board Assembly Drawing Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 6 February 6, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 202691C DATA SHEET • SKY65388-11: VARIABLE GAIN AMPLIFIER Layer 1: Top – Metal Layer 2: Ground Layer 3: Power Plane Layer 4: Solid Ground Plane S2331 Figure 5. SKY65388-11 Evaluation Board Layer Detail Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202691C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • February 6, 2014 7 DATA SHEET • SKY65388-11: VARIABLE GAIN AMPLIFIER Cross Section Name Thickness (mm) Material εr Pri 0.035 Cu-1 oz. – Die1 0.250 Rogers 4350 – L2 0.035 Cu-1 oz. – Die2 0.200 FR4 4.0 L3 0.035 Cu-1 oz. – Die3 0.250 FR4 4.0 Sec 0.035 Cu-1 oz. – S2631 Figure 6. Layer Detail Physical Characteristics Pin 12 Stencil aperture size of 80% to 100% of the module/pkg solder mask openings 8.685 4X 1.65 Pitch Pin 1 Indicator 0.20 X 0.20 12X 1.091 Pin 1 12X 0.81 25X 0.875 8.685 4X 1.91 Pitch Exposed Center Pad Component Outline 0.125 Typ 25X 0.875 Stencil Aperture Top View 8.685 Thermal Via Array, ∅0.3 mm on 0.6 mm pitch will improve thermal performance. NOTE: thermal vias should be tented with solder mask, 30-35 mm Cu plating recommended. Pin 12 Pin 12 8.785 1.65 Pitch 4X 1.65 Pitch Pin 1 Indicator 0.20 X 0.20 12X 1.191 0.25 Typ. Pin 1 Pin 1 12X 0.91 8.685 8.785 4X 1.91 Pitch 2X 2.4375 0.6 Pitch 5X 0.81 Component Outline Component Outline 5X 1.091 Exposed Center Pad Metallization Top View 2X 2.4375 Solder Mask Opening Top View S2367 All dimensions are in millimeters Figure 7. SKY65388-11 PCB Layout Footprint Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 8 Opening size of 60% to 100% of exposed center opening shown February 6, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 202691C B Pin 1 Indicator C 10X 2 8.385 6X 4.0925 DATA SHEET • SKY65388-11: VARIABLE GAIN AMPLIFIER Pin 1 Indicator See Detail B 6X 4.0925 Pin 1 10X 2 10X 1 8.385 0 A 0.15 A B C 0.10 12x SMT Pad 0.1 M A B C Side View Top View 0.841 ± 0.1 10X 1 A 1.35 ± 0.1 (0.1) 0.875 0 4X 1.65 4X 1.91 24X Solder Mask Opening See Detail C 0.2 A B C Bottom View 0.875 0.2 x 0.2 Metal Pad Edge 0.81 ± 0.05 0.875 0.875 5X R0.05 Max Soldermask Edges Detail A Pad Scale: 2X 4X R0.05 Max Soldermask Edges Detail B 24X Detail C Scale: 2X Scale: 2X 1X This Rotation 24X This Rotation 3X This Rotation 3X Rotated 180° 3X Rotated 90° CW 3X Rotated 90° CCW Dimensioning and tolerancing according to ASME Y14.5M-1994. Pads are metal defined. All measurements are in millimeters S2366 Figure 8. SKY65388-11 12-Pin MCM Package Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202691C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • February 6, 2014 9 DATA SHEET • SKY65388-11: VARIABLE GAIN AMPLIFIER Pin 1 ∅1.50 ± 0.10 2.00 ± 0.10 12.00 ± 0.10 4.00 ± 0.10 0.318 ± 0.013 T 1.75 ± 0.10 B A A 7.50 ± 0.10 5° Max 8.88 ± 0.10 (Bo) 16.00 +0.30/–0.10 B 2.14 ± 0.10 (Ko) ∅1.50 ± 0.25 B 8° Max 8.89 ± 0.10 (Ao) A Notes: 1. Carrier tape material: black conductive polycarbonate or polystyrene. 2. Cover tape material: transparent conductive material. 3. Typical ESD surface resistivity is ≤108 Ohms/square per EIA, JEDEC tape and reel specification. 4. Tolerance: .XX = ±0.10 mm. 5. All measurements are in millimeters. Y0636 Figure 9. SKY65388-11 Tape and Reel Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 10 February 6, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 202691C DATA SHEET • SKY65388-11: VARIABLE GAIN AMPLIFIER Ordering Information Model Name SKY65388-11 695-866 MHz Variable Gain Amplifier Manufacturing Part Number SKY65388-11 Evaluation Board Part Number TW16-D590 Copyright © 2013-2014 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. 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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 202691C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • February 6, 2014 11