DATA SHEET SKY65047-360LF: 0.4-3.0 GHz Low-Noise Amplifier Applications Description • Wireless infrastructure: WLAN, WiMAX, broadband, cellular base stations The SKY65047-360LF is a high linearity Low-Noise Amplifier (LNA). The excellent gain, superior low-noise and low current consumption makes the SKY65047-360LF ideal for use in wireless infrastructure applications. The device may also be used in a variety of LNA applications. All active circuitry in the module is contained in a single Microwave Monolithic Integrated Circuit (MMIC). • Test instrumentation • Satellite receivers • Paging • Remote metering • WLL and ISM receivers • GPS receivers Features • Noise Figure = 1.2 dB @ 915 MHz • Noise Figure = 0.8 dB @ 1575 MHz • Noise Figure = 1.1 dB @ 2450 MHz • Small signal gain = 16.6 dB @ 1575 MHz The device is manufactured with an advanced silicon germanium (SiGe) process, which allows a single supply operation while maintaining excellent low-noise performance and linearity. The SKY65047-360LF is provided in a low-cost, miniature 2 x 2 mm 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. • Low operating current = 7.2 mA • External, adjustable bias setting • Built-in power-down control • Single DC supply voltage, 2.7 V to 3.8 V • Miniature DFN (8-pin, 2 x 2 mm) package (MSL1, 260 °C per JEDEC J-STD-020) Figure 1. SKY65047-360LF Block Diagram Figure 2. SKY65047-360LF Pinout – 8-Pin DFN (Top View) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201084D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • April 8, 2011 1 DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER Table 1. SKY65047-360LF Signal Descriptions Pin # Name Description Pin # Name Description 1 GND Ground 5 VBIAS VCC bias voltage 2 RF_IN RF input 6 BIAS_R Bias reference voltage 3 GND Ground 7 RF_OUT/BIAS RF output/VCC bias 4 GND Ground 8 EN Amplifier enable control Functional Description The SKY65047-360LF includes an internal PA enable (pin 8, EN) for fast RF on/off control. A logic low voltage level disables the PA; a logic high voltage level enables the PA. The SKY65047-360LF is a single stage, low noise amplifier in a low-cost surface mount package. The device operates with a single +3.3 V power supply connected through an RF choke to the output pin. Surface mount capacitors provide DC bias decoupling for VCC. Electrical and Mechanical Specifications The absolute maximum ratings of the SKY65047-360LF are provided in Table 2. The recommended operating conditions are specified in Table 3 and electrical specifications are provided in Table 4. The bias current is set by a reference voltage transistor and by resistor R1. Pin 2 (RF_IN) is the RF input and Pin 7 (RF-OUT/BIAS) is the RF output. The part is externally RF matched and DC blocked using surface mount components to facilitate operation over a frequency range of 0.4 to 3.0 GHz. Pins 1, 3, and 4, and the package backside metal provide the DC and RF ground. Typical performance characteristics for the SKY65047-360LF are illustrated in Figures 3 through 8. Table 2. SKY65047-360LF Absolute Maximum Ratings Maximum Units Supply voltage Parameter VCC 4 V Total supply current IBIAS 20 mA RF input power PIN +20 dBm Storage temperature TSTG +125 °C Junction temperature TJ Case temperature TCASE Note: Symbol Minimum Typical –65 –40 +125 °C +85 °C 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. SKY65047-360LF Recommended Operating Conditions Parameter Symbol Minimum Frequency f RF input power PIN Bias supply voltage (Note 1) VBIAS 2.7 Amplifier enable control (on) EN_ON Amplifier enable control (off) EN_OFF Operating temperature TOP Typical 0.4 Maximum 3.0 GHz –20 dBm 3.8 V VCC–0.3 VCC V 0 0.2 V +85 °C –40 3.3 +25 Note 1: Voltage applied to pin 5 (VBIAS) and pin 7 (RF_OUT/BIAS). Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 2 Units April 8, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201084D DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER Table 4. SKY65047-360LF Electrical Specifications (Note 1) (1 of 2) (VBIAS and EN = 3.3 V, Characteristic Impedance [ZO] = 50 Ω, TCASE = 25 °C, Unless Otherwise Noted) Parameter Symbol Test Condition Min Typical Max Units 450 MHz Matched Performance Gain G Gain variation over temperature G 25 °C to –40 °C or 25 °C to +85 °C 19.6 dB ±0.5 dB Isolation Iso –32.7 dB Noise Figure NF 1.4 dB Noise Figure variation over temperature NF ±0.3 dB 3rd Order Input Intercept Point IIP3 –6 dBm ±0.7 dB rd 25 °C to –40 °C or 25 °C to +85 °C 3 Order Input Intercept Point variation over temperature IIP3 25 °C to –40 °C or 25 °C to +85 °C Input return loss IRL With external matching 14 dB Output return loss ORL With external matching 15 dB Supply current ICC Bias resistor = 4.7 kΩ 6.9 mA 17 dB 25 °C to –40 °C or 25 °C to +85 °C ±0.4 dB 915 MHz Matched Performance Gain G Gain variation over temperature G Isolation Iso 28 dB Noise Figure NF 1.2 dB Noise Figure variation over temperature NF ±0.2 dB 1 dB Input Compression Point IP1dB –16.5 dBm rd 25 °C to –40 °C or 25 °C to +85 °C 3 Order Input Intercept Point IIP3 PIN = –30 dBm/tone, 200 kHz spacing +0.8 dBm 3rd Order Input Intercept Point variation over temperature IIP3 25 °C to –40 °C or 25 °C to +85 °C ±0.5 dB Input return loss IRL With external matching 15.5 dB Output return loss ORL With external matching 12.7 dB Supply current ICC Bias resistor = 4.7 kΩ 6.5 mA 16.6 dB ±0.6 dB 1575 MHz Matched Performance Gain G Gain variation over temperature G Isolation Iso Noise Figure NF Noise Figure variation over temperature NF 1 dB Input Compression Point IP1dB rd 25 °C to –40 °C or 25 °C to +85 °C 22 26 0.8 25 °C to –40 °C or 25 °C to +85 °C 3 Order Input Intercept Point IIP3 PIN = –30 dBm/tone, 200 kHz spacing 3rd Order Input Intercept Point variation over temperature IIP3 25 °C to –40 °C or 25 °C to +85 °C dB 1.2 dB ±0.3 dB –18.4 –15.8 dBm +1.0 +3.2 dBm ±0.8 dB Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201084D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • April 8, 2011 3 DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER Table 4. SKY65047-360LF Electrical Specifications (Note 1) (2 of 2) (VBIAS and EN = 3.3 V, Characteristic Impedance [ZO] = 50 Ω, TCASE = 25 °C, Unless Otherwise Noted) Parameter Symbol Test Condition Min Typical 14.5 Max Units 1575 MHz Matched Performance (continued) Input return loss IRL With external matching 10.0 Output return loss ORL With external matching 10 Supply current ICC Bias resistor = 4.7 kΩ dB 12 dB 7.2 mA 15.9 dB ±0.3 dB 1900 MHz Matched Performance Gain G Gain variation over temperature G 25 °C to –40 °C or 25 °C to +85 °C Isolation Iso 22 dB Noise Figure NF 1.3 dB Noise Figure variation over temperature NF ±0.2 dB 1 dB Input Compression Point IP1dB –12.8 dBm rd 25 °C to –40 °C or 25 °C to +85 °C 3 Order Input Intercept Point IIP3 3rd Order Input Intercept Point variation over temperature IIP3 25 °C to –40 °C or 25 °C to +85 °C +4.7 dBm ±0.4 dB Input return loss IRL With external matching 18 dB Output return loss ORL With external matching 23 dB Supply current ICC Bias resistor = 4.7 kΩ 7.1 mA 14.8 dB 25 °C to –40 °C or 25 °C to +85 °C ±0.3 dB 2450 MHz Matched Performance Gain G Gain variation over temperature G Isolation Iso 21 dB Noise Figure NF 1.1 dB Noise Figure variation over temperature NF 25 °C to –40 °C or 25 °C to +85 °C ±0.2 dB 1 dB Input Compression Point IP1dB –9.6 dBm 3rd Order Input Intercept Point IIP3 PIN = –30 dBm/tone, 200 kHz spacing +7.5 dBm 3rd Order Input Intercept Point variation over temperature IIP3 25 °C to –40 °C or 25 °C to +85 °C ±0.3 dB Input return loss IRL With external matching 14 dB Output return loss ORL With external matching 16 dB Supply current ICC Bias resistor = 4.7 kΩ 6.4 mA ILKG No RF 0.1 μA Power-Down Leakage current Note 1: Performance is guaranteed only under the conditions listed in this Table. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 4 April 8, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201084D DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER Typical Performance Characteristics (VBIAS and EN = 3.3 V, Characteristic Impedance [ZO] = 50 Ω, TCASE = 25 °C, Unless Otherwise Noted) Figure 3. Gain Over Temperature and Frequency Figure 4. Gain Over Supply Voltage and Frequency Figure 5. IIP3 Over Temperature and Frequency Figure 6. IIP3 Over Supply Voltage and Frequency Figure 7. Noise Figure Over Temperature and Frequency Figure 8. Noise Figure Over Supply Voltage and Frequency Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201084D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • April 8, 2011 5 DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER Evaluation Board Description The SKY65047-360LF Evaluation Board is used to test the performance of the SKY65047-360LF LNA. Three different boards are available, depending on the desired performance frequency: 915 MHz, 1575 MHz, and 2450 MHz. Evaluation Board schematic diagrams are provided in Figures 9, 11, and 13. Assembly drawings for the Evaluation Board are shown in Figures 10, 12, and 14. reasons. Multiple small vias are acceptable and will work well under the device if solder migration is an issue. GND (pins 1, 3, and 4). Attach all ground pins to the RF ground plane with the largest diameter and lowest inductance via that the layout allows. Multiple small vias are acceptable and will work well under the device if solder migration is an issue. Pin 3 can also be connected to ground with a small inductance of emitter degeneration. RF_IN (pin 2). The LNA requires a DC blocking capacitor as part of the external RF matching. Evaluation Board layer detail drawings for the 915 MHz, 1575 MHz, and 2450 MHz boards are shown in Figures 15, 16, and 17, respectively. Layer detail physical characteristics are noted in Figure 18. VBIAS (pin 5). The bias supply voltage for the LNA is typically set to +3.3 V using a bias resistor. Circuit Design Considerations BIAS_R (pin 6). This pin is typically connected to ground through a bias resistor. The following design considerations are general in nature and must be followed regardless of final use or configuration: 1. Paths to ground should be made as short as possible. 2. The ground pad of the SKY65047-360LF 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 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 slug and ground increases junction temperature (TJ), which reduces the lifetime of the device. Evaluation Board Test Procedure Step 1: Connect RF test equipment to amplifier input/output SMA connectors. Step 2: Connect DC ground. Step 3: Connect VCC to a +3.3 V supply. Verify that the board draws approximately 6.7 mA. Step 4: Connect pin 8 (EN) to a +3.3 V supply to enable the LNA. Set EN to 0 V to disable the LNA. Step 5: Apply an RF input signal of –40 dBm and observe the output signal level. This level should be approximately –23.5 dBm with a gain equal to approximately 16.5 dB. Application Circuit Notes RF_OUT/BIAS (pin 7). The LNA collector supply voltage is supplied through an RF choke (component L3 on the 915 MHz and 2450 MHz Evaluation Boards, and component L2 on the 1575 MHz Evaluation Board) to the output at pin 7. The LNA requires a DC blocking capacitor as part of the external RF matching. EN (pin 8). A logic low voltage level disables the internal PA; a logic high voltage level enables the internal PA. Package Dimensions The PCB layout footprint for the SKY65047-360LF is shown in Figure 19. Typical case markings are shown in Figure 20. Package dimensions for the 8-pin DFN are shown in Figure 21, and tape and reel dimensions are provided in Figure 22. Package and Handling Information 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 SKY65047-360LF 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. Center Ground. It is extremely important to sufficiently ground the bottom ground pad of the device for both thermal and stability Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 6 April 8, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201084D DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER Figure 9. SKY65047-360LF Evaluation Board Schematic (915 MHz) Figure 10. SKY65047-360LF Evaluation Board Assembly Diagram (915 MHz) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201084D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • April 8, 2011 7 DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER Figure 11. SKY65047-360LF Evaluation Board Schematic (1575 MHz) Figure 12. SKY65047-360LF Evaluation Board Assembly Diagram (1575 MHz) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 8 April 8, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201084D DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER Figure 13. SKY65047-360LF Evaluation Board Schematic (2450 MHz) Figure 14. SKY65047-360LF Evaluation Board Assembly Diagram (2450 MHz) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201084D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • April 8, 2011 9 DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER Figure 15. SKY65047-360LF Evaluation Board Layer Detail (915 MHz) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 10 April 8, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201084D DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER Figure 16. SKY65047-360LF Evaluation Board Layer Detail (1575 MHz) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201084D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • April 8, 2011 11 DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER Figure 17. SKY65047-360LF Evaluation Board Layer Detail (2450 MHz) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 12 April 8, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201084D DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER Figure 18. Layer Detail Physical Characteristics Figure 19. SKY65047-360LF PCB Layout Footprint (Top View) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201084D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • April 8, 2011 13 DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER Figure 20. Typical Case Markings (Top View) Figure 21. SKY65047-360LF 8-Pin DFN Package Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 14 April 8, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201084D DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER Figure 22. SKY65047-360LF Tape and Reel Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201084D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • April 8, 2011 15 DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER Ordering Information Model Name SKY65047-360LF Low Noise Amplifier Manufacturing Part Number SKY65047-360LF Evaluation Board Part Number TW17-D900 (915 MHz) TW17-D910 (1575 MHz) TW17-D920 (2450 MHz) Copyright © 2009, 2010, 2011 Skyworks Solutions, Inc. All Rights Reserved. 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Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 16 April 8, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201084D