DATA SHEET SKY65053-377LF: 0.45-6.0 GHz Low Noise Transistor Applications • Wireless infrastructure: WLAN, WiMAX, broadband, cellular base stations • Test instrumentation • LNA for GPS receivers • Satellite receivers Figure 1. SKY65053-377LF Block Diagram The SKY65053-377LF is a high performance, n-channel lownoise transistor. The device is fabricated from Skyworks advanced depletion mode pHEMT process and is provided in a 2 x 2 mm, 4-pin Quad Flat No-Lead (QFN) package. The transistor’s low Noise Figure (NF), high gain, and excellent 3rd Order Intercept Point (IP3) allow the device to be used in various receiver and transmitter applications. SOURCE 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. 1 2 4 3 GATE • Small, QFN (4-pin, 2 x 2 mm) Pb-free package (MSL3, 260 °C per JEDEC J-STD-020) Description DRAIN • Externally matched for wideband operation • Noise Figure = 0.6 dB @ 2.4 GHz of device only • Noise Figure = 0.8 dB @ 2.4 GHz including matching network loss • Gain = 16.5 dB @ 2.4 GHz, 5 V, 55 mA • OIP3 = +33.5 dBm @ 2.4 GHz, 5 V, 55 mA • OP1dB = +15.5 dBm @ 2.4 GHz, 5 V, 55 mA • Adjustable supply current, 15 to 100 mA • Unconditionally stable to 18 GHz with reference design circuit SOURCE Features Figure 2. SKY65053-377LF Pinout – 4-Pin QFN (Top View) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201089C • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • July 7, 2009 1 DATA SHEET • SKY65053-377LF LOW NOISE TRANSISTOR Table 1. SKY65053-377LF Signal Descriptions Pin # Name Description Pin # Name Description 1 DRAIN RF output. Supply voltage required through external RF choke. 3 GATE RF input 2 SOURCE Source lead. Provides DC self-biasing point and AC ground. 4 SOURCE Source lead. Provides DC self-biasing point and AC ground. Functional Description The SKY65053-377LF is a depletion mode pHEMT designed for low noise, high frequency applications that demand high linearity. The SKY65053-377LF has a typical NF of 0.8 dB tested at the 2.4 GHz wireless LAN frequency band. A gain of 16.5 dB typical is achieved using the same circuit. The SKY65053-377LF can be used for any application from 450 MHz up to 6 GHz. Biasing To properly bias a depletion mode pHEMT, both the gate and drain of the device must be properly biased. At VGS = 0 V and VDS ≥ 2V, the device is in its saturated state and draws the maximum amount of current, IDSS. Typically, the device achieves the best balance of noise and linearity performance at VDS = 5V and IDS = 55 mA. To control IDS, VGS must be biased with a negative voltage supply. To eliminate the need for a negative DC supply, self-biasing should be used when a resistor is placed between one of the source leads and ground. A bypass capacitor should be placed in parallel to this resistor to provide an RF ground and to ensure performance at the operating frequency remains unchanged. input matching structure losses on the input of the amplifier add directly to the overall NF of the amplifier. It is critical to minimize RF trace lengths and to use high-Q components to achieve optimal NF performance. Components R1 and C10 provide self-bias for the device and RF grounding for one of the two source leads. Component C6 is placed on the opposing source lead and is used to tune the transistor’s internal source inductance. The effect of source inductance varies with frequency. Too little source inductance increases gain and high frequency stability, but at the cost of decreased in-band stability. Too much source inductance decreases high frequency stability and gain, but increases in-band stability. It is very important to find the optimum tuning of source inductance that balances all of these variables. The output matching topology is typical for an RF amplifier. Component L4 is the RF choke that prevents RF signals from reaching the DC supply. Component C11 is the output DC blocking capacitor. Components C12 and L6 provide the best impedance match for best linearity performance. When current flows from drain to source and through the resistor, the source voltage becomes biased above DC ground. The gate pin of the device should be left unbiased at 0 V, which creates the desired negative VGS value. This greatly simplifies the design by eliminating the need for a second DC supply. Electrical and Mechanical Specifications RF Matching Networks Performance characteristics for the SKY65053-377LF are illustrated in Figures 3 through 10. The circuit schematic (see Figure 12) shows the recommended RF matching network used for the 2.4 GHz wireless LAN frequency band. Components C1, C2, L1, and L2 provide the necessary impedance match for NF and input return loss. Circuit board and The absolute maximum ratings of the SKY65053-377LF 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 July 7, 2009 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 201089C DATA SHEET • SKY65053-377LF LOW NOISE TRANSISTOR Table 2. SKY65053-377LF Absolute Maximum Ratings Parameter Symbol Supply voltage VDD Input power Gate to source voltage Minimum Typical Maximum Units 6 V PIN +15 dBm VGS –5.0 V Gate to drain voltage VGD –5.0 V Drain to source current IDS 110 mA Gate to drain current IGD 100 μA Power dissipation PDIS 240 mW Junction temperature TJ 150 °C Storage temperature TSTG –65 Operating temperature TOP –40 Thermal resistance ΘJC Note: °C +125 °C +85 °C/W 220 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. SKY65053-377LF Recommended Operating Conditions Parameter Symbol Minimum Operating frequency f 0.45 Supply voltage VDD 2.00 Supply current IDD 15 Typical Maximum Units 6.0 GHz 5.00 5.25 V 55 100 mA Table 4. SKY65053-377LF Electrical Specifications (Note 1) (1 of 2) (TOP = +25 °C, Characteristic Impedance [ZO] = 50 Ω, VDD = 5 V, IDD = 55 mA, Parameters Include Recommended Matching Networks, Unless Otherwise Noted) Parameter Symbol Test Condition Saturated drain current IDSS VDS = 6 V, VGS = 0 V Pinchoff voltage VP VDS = 6 V, IDS = 2.5% of IDSS Transconductance gM VDS = 6 V, gM = ΔIDS/ΔVGS, measured at IDS = 20% of IDSS Gate leakage current IGSS VGD = VGS = –3 V Noise Figure NF1 (Note 2) Min Typical Max Units 80 100 120 mA –0.95 –0.80 –0.65 V 80 120 160 mS 1 200 μA 0.6 dB NF2 (Note 3) 0.8 dB Gain |S21| 16.5 dB Input return loss |S11| –12 dB Output return loss |S22| –7 dB Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201089C • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • July 7, 2009 3 DATA SHEET • SKY65053-377LF LOW NOISE TRANSISTOR Table 4. SKY65053-377LF Electrical Specifications (Note 1) (2 of 2) (TOP = +25 °C, Characteristic Impedance [ZO] = 50 Ω, VDD = 5 V, IDD = 55 mA, Parameters Include Recommended Matching Networks, Unless Otherwise Noted) Parameter Symbol Reverse isolation Test Condition Min Typical |S12| rd Max Units –25 dB 3 Order Output Intercept Point OIP3 POUT = +5 dBm/tone, 1 MHz spacing +33.5 dBm 3rd Order Input Intercept Point IIP3 POUT = +5 dBm/tone, 1 MHz spacing +17 dBm 1 dB Output Compression Point OP1dB +15.5 dBm 1 dB Input Compression Point IP1dB 0 dBm >1 K Stability Unconditionally stable up to 18 GHz Note 1: Performance is guaranteed only under the conditions listed in this Table and is not guaranteed over the full operating or storage temperature ranges. Exceeding any of the conditions listed here may result in permanent damage to the device. Operation at elevated temperatures may reduce reliability of the device. Note 2: NF of device only. Input RF connector, board, and input matching network loss de-embedded from measurement. Note 3: NF of device and matching network. Input RF connector and board loss de-embedded from measurement. Typical Performance Characteristics (TOP = +25 °C, Characteristic Impedance [ZO] = 50 Ω, VDD = 5 V, IDD = 55 mA, Includes Recommended 2.4 GHz Matching Network, Unless Otherwise Noted) 0 20 19 Input Return Loss (dB) Small Signal Gain (dB) –40 oC +25 oC +85 oC –5 18 17 16 15 14 –10 –15 13 –40 oC +25 oC +85 oC 12 11 –20 –25 10 1.6 1.8 2.0 2.2 2.4 2.6 2.8 Frequency (GHz) Figure 3. Small Signal Gain vs Frequency Over Temperature (PIN = –20 dBm) 3.0 1.6 1.8 2.0 2.2 2.4 2.6 Figure 4. Input Return Loss vs Frequency Over Temperature (PIN = –20 dBm) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 4 2.8 Frequency (GHz) July 7, 2009 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 201089C 3.0 DATA SHEET • SKY65053-377LF LOW NOISE TRANSISTOR 0 0 –40 oC +25 oC +85 oC –5 –4 Output Return Loss (dB) Recverse Isolation (dB) –10 –2 –15 –20 –25 –30 –35 –6 –8 –10 –12 –40 oC +25 oC +85 oC –14 –40 –16 –45 –18 –20 –50 1.6 1.8 2.0 2.2 2.4 2.6 2.8 1.6 3.0 1.8 2.0 2.2 2.4 2.6 2.8 3.0 Frequency (GHz) Frequency (GHz) Figure 6. Output Return Loss vs Frequency Over Temperature (PIN = –20 dBm) Figure 5. Reverse Isolation vs Frequency Over Temperature (PIN = –20 dBm) +40 1.2 +35 1.0 +25 OIP3 (dBm) Noise Figure (dB) +30 0.8 –40 oC +25 oC +85 oC 0.6 0.4 +20 –40 oC +25 oC +85 oC +15 +10 0.2 +5 0 0 2.30 2.35 2.40 2.45 2.50 2.55 4.0 2.60 4.2 4.4 4.8 5.0 5.2 Figure 8. OIP3 vs Supply Voltage (f = 2.4 GHz, Tone Spacing = 10 MHz, POUT = +5 dBm/Tone) Figure 7. Noise Figure vs Frequency Over Temperature 17.5 8 17.0 7 16.5 6 μ1 –40 oC μ1 +25 oC μ1 +85 oC μ2 –40 oC μ2 +25 oC μ2 +85 oC 5 16.0 μ1, μ2 Gain (dB) 4.6 Supply Voltage (V) Frequency (GHz) 15.5 4 3 –40 oC +25 oC +85 oC 15.0 14.5 2 1 14.0 0 –20 –15 –10 –5 0 Input Power (dBm) Figure 9. Gain vs Input Power Over Temperature (f = 2.4 GHz) +5 0 2 4 6 8 10 12 14 16 18 Frequency (GHz) Figure 10. Stability vs Frequency Over Temperature (PIN = –20 dBm) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201089C • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • July 7, 2009 5 DATA SHEET • SKY65053-377LF LOW NOISE TRANSISTOR Evaluation Board Description The SKY65053-377LF Evaluation Board is used to test the performance of the SKY65053-377LF low noise transistor. An assembly drawing for the Evaluation Board is shown in Figure 11. The Evaluation Board schematic diagram is shown in Figure 12. Table 5 provides the Bill of Materials (BOM) list for Evaluation Board components. Circuit Design Considerations Input and output traces have been minimized to reduce losses. All surface mount components are 0402-sized to reduce component parasitics. Use of 0603 or larger components is not recommended. Component spacing has also been minimized. The board is provisioned with two RF connectors and a DC launch. RF connector and board loss up to component C1 is approximately 0.1 dB at 2.4 GHz. It is very important to place multiple ground vias as close to shunt components as possible. This ensures proper grounding and circuit performance. Board material is 10 mil VT47 FR4 with 1 oz. copper cladding. The RF traces are 50 Ω. Caution: Do not ground the exposed pad. Evaluation Board Test Procedure Step 1: Connect RF test equipment to amplifier input/output SMA connectors. Step 2: Connect DC ground. Step 3: Connect VDD to a +5 V supply with a current limit of 100 mA. Verify that the board draws approximately 55 mA. Step 4: Apply RF signal or noise source. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 6 July 7, 2009 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 201089C DATA SHEET • SKY65053-377LF LOW NOISE TRANSISTOR Caution: Do not ground the exposed pad. S1512 Figure 11. SKY65053-377LF Evaluation Board Assembly Diagram C11 L5 RF Output C12 L6 L4 C1 L2 RF Input C2 C13 C3 L1 C6 C14 C4 L3 C5 R2 R1 C10 C7 C15 VDD S1509 Figure 12. SKY65053-377LF Evaluation Board Schematic Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201089C • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • July 7, 2009 7 DATA SHEET • SKY65053-377LF LOW NOISE TRANSISTOR Table 5. SKY65053-377LF Evaluation Board Bill of Materials Component Value Size Manufacturer/Part Series C1 33 pF 0402 Murata GRM015 C2 1.2 pF 0402 Murata GJM015 C3 0.3 pF 0402 Murata GJM015 C4, C5, C7, C8, C9, C14 DNP C6 10000 pF 0402 Murata GRM015 C10 10000 pF 0402 Murata GRM015 C11 3.6 pF 0402 Murata GJM015 C12 0.3 pF 0402 Murata GJM015 C13 3.9 pF 0402 Murata GRM015 C15 1000 pF 0402 Murata GRM015 L1 12 nH 0402 Coilcraft HP L2 2 nH 0402 Coilcraft HP L3 DNP L4 5.6 nH 0402 Coilcraft HP L5 0Ω 0402 Panasonic L6 6.8 nH 0402 Taiyo Yuden HK R1 4.7 Ω 0402 Panasonic R2 39 Ω 0402 Panasonic Package Dimensions The PCB layout footprint for the SKY65053-377LF is shown in Figure 13. Typical case markings are shown in Figure 14. Package dimensions for the 4-pin QFN are shown in Figure 15, and tape and reel dimensions are provided in Figure 16. 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 SKY65053-377LF is rated to Moisture Sensitivity Level 3 (MSL3) at 260 °C. It can be used for lead or lead-free soldering. 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. For packaging details, refer to the Skyworks Application Note, Discrete Devices and IC Switch/Attenuators Tape and Reel Package Orientation, document number 200083. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 8 July 7, 2009 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 201089C DATA SHEET • SKY65053-377LF LOW NOISE TRANSISTOR 4X 0.600 2X 0.300 See Detail A for Solderable Area 2X 0.600 0.650 1.250 1.300 0.600 Pin 1 See Detail B for Solderable Area Package Outline 0.55 0.55 0.40 0.30 Detail B Detail A (3X) Caution: Do not ground the exposed pad. S1416 Figure 13. SKY65053-377LF PCB Layout Footprint Pin 1 Indicator Skyworks Part # S53 Figure 14. Typical Case Markings (Top View) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201089C • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • July 7, 2009 9 DATA SHEET • SKY65053-377LF LOW NOISE TRANSISTOR 0.6+0.1/–0.15 2.00 C A (0.300) 0.02+0.03/–0.02 B Exposed Pad Detail B 1.2+0.1/–0.15 2X 0.65 1.25 2.00 2X 0.10 C 2X Pin 1 Indicator 0.10 C 1.30 (0.600) Detail A 0.55+0.05/–0.04 4X 0.20 Min 4X 0.08 C 0.10 C 3 Top View Side View Bottom View 0.4 ± 0.1 0.4 ± 0.1 0.4 ± 0.05 0.3 ± 0.05 0.10 M C A B R 0.15 Detail A 5 Detail B (3 Places) All measurements are in millimeters. Dimensioning and tolerancing according to ASME Y14.5M-1994. Figure 15. SKY65053-377LF 4-Pin QFN Package Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 10 July 7, 2009 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 201089C S1411 DATA SHEET • SKY65053-377LF LOW NOISE TRANSISTOR ∅1.50+ 0.10/–0.00 0.30 ± 0.05 (T) Pin #1 4.00 ± 0.10 2.00 ± 0.05 4.00 (Note 4) 1.75 ± 0.10 3.50 ± 0.05 A 2.30 (Bo) A B 1.00 (Ko) 2.30 (Ao) 8.00 +0.30/–0.10 B ∅1.00 Min. R0.30 Typ. B A Notes: 1. Carrier tape: black conductive polystyrene. 2. Cover tape material: transparent conductive HSA. 3. Cover tape size: 5.40 mm width. 4. Ten sprocket hole pitch cumulative tolerance ±0.20 mm. 5. Ao and Bo measurement point to be 0.30 mm from bottom pocket. 6. All measurements are in millimeters. S1555 Figure 16. SKY65053-377LF Tape and Reel Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201089C • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • July 7, 2009 11 DATA SHEET • SKY65053-377LF LOW NOISE TRANSISTOR Ordering Information Model Name SKY65053-377LF Low Noise Transistor Manufacturing Part Number SKY65053-377LF (Pb-free package) Evaluation Board Part Number SKY65053-377LF (2.4 GHz) Copyright © 2009 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. 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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 12 July 7, 2009 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 201089C