DATA SHEET SKY67102-396LF: 2.0-3.0 GHz High Linearity, Active Bias Low-Noise Amplifier Applications • CDMA, WCDMA, TD-SCDMA, WiMAX, and LTE cellular infrastructure • Ultra low-noise systems Features • Ultra Low Noise Figure: 0.8 dB @ 2.6 GHz • Input and output return loss > 18 dB @ 2.6 GHz • High IIP3 performance: +16.7 dBm @ 2.6 GHz • Adjustable supply current and gain • Temperature and process-stable active bias • Miniature DFN (8-pin, 2 x 2 mm) package (MSL1 @ 260 °C per JEDEC J-STD-020) Figure 1. SKY67102-396LF Block Diagram Description The SKY67102-396LF is GaAs, pHEMT Low-Noise Amplifier (LNA) with an active bias and high linearity performance. The advanced GaAs pHEMT enhancement mode process provides excellent return loss, low noise, and high linearity performance. The internal active bias circuitry provides stable performance over temperature and process variation. The device offers the ability to externally adjust supply current and gain. Supply voltage is applied to the RFOUT/VDD pin through an RF choke inductor. Pin 4 (VIN) should be connected to RFOUT/VDD through an external resistor to control the supply current. The RFIN and RFOUT/VDD pins should be DC blocked to ensure proper operation. Pin 5 (FEEDBACK) is connected through an RC network to externally adjust the gain of the device without affecting the Noise Figure (NF) of the LNA. The SKY67102-396LF operates in the frequency range of 2.0 to 3.0 GHz with proper tuning. For lower frequency operation, the pin-compatible SKY67100-396LF or SKY67101-396LF should be used. Figure 2. SKY67102-396LF Pinout – 8-Pin DFN (Top View) The LNA is manufactured in a compact, 2 x 2 mm, 8-pin Dual Flat No-Lead (DFN) 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. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201631B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • September 28, 2011 1 DATA SHEET • SKY67102-396LF HIGH LINEARITY, ACTIVE BIAS LNA Table 1. SKY67102-396LF Signal Descriptions Pin # Name Description Pin # Name Description 1 N/C No connection. May be connected to ground with no change in performance. 5 FEEDBACK LNA external gain control. Connect to RFOUT using a series RD network. 2 RFIN RF input. DC blocking capacitor required. 6 N/C No connection. May be connected to ground with no change in performance. 3 RFGND RF ground. Connect to ground through a capacitor. 7 RFOUT/VDD RF output. Apply VDD through RF choke inductor. DC blocking capacitor required. 4 VIN LNA supply current. Connect through series resistor to VDD. 8 N/C No connection. May be connected to ground with no change in performance. Table 2. SKY67102-396LF Absolute Maximum Ratings Parameter Symbol Minimum Typical Maximum Units Supply voltage VDD 5.5 V Supply current IDD 100 mA RF input power PIN +20 dBm Storage temperature TSTG –65 +25 +125 °C Operating temperature TA –40 +25 +85 °C Junction temperature TJ +150 °C Notes: 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. Thermal resistance = 83 °C/W @ 4 V bias. 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. The SKY67102-396LF is a Human Body Model (HBM) Class 1A ESD device. Electrical and Mechanical Specifications The absolute maximum ratings of the SKY67102-396LF are provided in Table 2. Electrical specifications are provided in Table 3. Typical performance characteristics of the SKY67102-396LF are illustrated in Figures 3 through 14. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 2 September 28, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201631B DATA SHEET • SKY67102-396LF HIGH LINEARITY, ACTIVE BIAS LNA Table 3. SKY67102-396LF Electrical Specifications (Note 1) (VDD = 4.0 V, IDD = 50 mA, TA = +25 °C, PIN = –20 dBm, Characteristic Impedance [ZO] = 50 Ω, Unless Otherwise Noted) Parameter Symbol Test Condition Min Typical Max Units 1.10 0.80 1.10 0.95 dB dB dB 18.2 dB dB dB RF Specifications Noise Figure (Note 2) Small signal gain NF |S21| Input return loss |S11| Output return loss |S22| Reverse isolation |S12| @ 2.0 GHz @ 2.6 GHz @ 3.0 GHz @ 2.0 GHz @ 2.6 GHz @ 3.0 GHz 16.2 18.2 17.2 1.12 @ 2.0 GHz @ 2.6 GHz @ 3.0 GHz 15 10 18 12 dB dB dB @ 2.0 GHz @ 2.6 GHz @ 3.0 GHz 14 9 17 13 dB dB dB @ 2.0 GHz @ 2.6 GHz @ 3.0 GHz 34 37 37 38 dB dB dB +16.7 dBm +33.8 dBm 3rd Order Input Intercept Point IIP3 @ 2.6 GHz, Δf = 5 MHz, PIN = –18 dBm/tone 3rd Order Output Intercept Point OIP3 @ 2.6 GHz, Δf = 5 MHz, PIN = –18 dBm/tone 1 dB Input Compression Point IP1dB @ 2.6 GHz –1 dBm 1 dB Output Compression Point OP1dB @ 2.6 GHz +15.1 dBm Stability μ1, μ2 Up to 18 GHz, –40 °C to +85 °C >1 – +32.0 DC Specifications Supply voltage VDD Supply current IDD Set with external resistor 3.3 4.0 5.0 V 15 50 90 mA Note 1: Performance is guaranteed only under the conditions listed in this Table. Note 2 Loss from the input SMA connector and Evaluation Board up to component C1 has been de-embedded from the NF measurement. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201631B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • September 28, 2011 3 DATA SHEET • SKY67102-396LF HIGH LINEARITY, ACTIVE BIAS LNA Typical Performance Characteristics (VDD = 4.0 V, IDD = 50 mA, TA = +25 °C, PIN = –20 dBm, Characteristic Impedance [ZO] = 50 Ω, Unless Otherwise Noted) Figure 3. Broadband Gain Response vs Frequency Over Temperature Figure 4. Narrowband Gain Response vs Frequency Over Temperature Figure 5. Broadband Input Return Loss vs Frequency Over Temperature Figure 6. Narrowband Input Return Loss vs Frequency Over Temperature Figure 7. Broadband Reverse Isolation vs Frequency Over Temperature Figure 8. Narrowband Reverse Isolation vs Frequency Over Temperature Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 4 September 28, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201631B DATA SHEET • SKY67102-396LF HIGH LINEARITY, ACTIVE BIAS LNA Figure 9. Broadband Output Return Loss vs Frequency Over Temperature Figure 10. Narrowband Output Return Loss vs Frequency Over Temperature Figure 11. Noise Figure vs Frequency Over Temperature Figure 12. μ1 Stability vs Frequency Over Temperature @ 4 V Figure 13. μ2 Stability vs Frequency Over Temperature @ 4 V Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201631B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • September 28, 2011 5 DATA SHEET • SKY67102-396LF HIGH LINEARITY, ACTIVE BIAS LNA Evaluation Board Description Package and Handling Information The SKY67102-396LF Evaluation Board is used to test the performance of the SKY67102-396LF LNA. An assembly drawing for the Evaluation Board is shown in Figure 14. An Evaluation Board schematic diagram is provided in Figure 15. Table 4 provides the Bill of Materials (BOM) list for Evaluation Board components. 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 test board uses a 10 mil Rogers 4350B substrate on a 50 mil FR4 supporting substrate. The Rogers 4350B material was selected for the RF circuit because of its low dielectric constant (εr) and low εr variation over temperature for the best possible noise performance. Package Dimensions THE SKY67102-396LF 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. Production quantities of this product are shipped in a standard tape and reel format. The PCB layout footprint for the SKY67102-396LF is provided in Figure 16. Typical case markings are shown in Figure 17. Package dimensions for the 8-pin DFN are shown in Figure 18, and tape and reel dimensions are provided in Figure 19. Figure 14. SKY67102-396LF Evaluation Board Assembly Diagram Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 6 September 28, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201631B DATA SHEET • SKY67102-396LF HIGH LINEARITY, ACTIVE BIAS LNA Figure 15. SKY67102-396LF Evaluation Board Schematic Table 4. SKY67102-396LF Evaluation Board Bill of Materials Component Value Size Manufacturer C1 10 pF SMT 0402 Murata GJM (high Q) C2 3.6 pF SMT 0402 Murata GJM (high Q) C3 0.1 μF SMT 0402 Murata GRM C4 DNI – – C5 100 pF SMT 0402 Murata GRM C6 10 pF SMT 0402 Murata GRM C7 1000 pF SMT 0402 Murata GRM C8 DNI – – L1 3.3 nH SMT 0402 Murata LQW L2 2.4 nH SMT 0402 Murata LQG R1 3600 Ω SMT 0402 Panasonic R2 DNI – – Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201631B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • September 28, 2011 7 DATA SHEET • SKY67102-396LF HIGH LINEARITY, ACTIVE BIAS LNA Figure 16. SKY67102-396LF PCB Layout Footprint (Top View) Figure 17. Typical Case Markings (Top View) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 8 September 28, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201631B DATA SHEET • SKY67102-396LF HIGH LINEARITY, ACTIVE BIAS LNA Figure 18. SKY67102-396LF 8-Pin DFN Package Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201631B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • September 28, 2011 9 DATA SHEET • SKY67102-396LF HIGH LINEARITY, ACTIVE BIAS LNA Figure 19. SKY67102-396LF Tape and Reel Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 10 September 28, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201631B DATA SHEET • SKY67102-396LF HIGH LINEARITY, ACTIVE BIAS LNA Ordering Information Model Name SKY67102-396LF LNA Manufacturing Part Number SKY67102-396LF Evaluation Board Part Number SKY67102-396LF-EVB Copyright © 2011 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 201631B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • September 28, 2011 11