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PRELIMINARY DATA SHEET
SKY65052-372LF: 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
Features
* Externally matched for wideband operation * Noise Figure = 0.6 dB @ 2.4 GHz of device only * Noise figure = 0.85 dB @ 2.4 GHz including matching network loss * Gain = 16 dB @ 2.4 GHz * OIP3 = +34 dBm @ 2.4 GHz * P1dB = +19 dBm @ 2.4 GHz * Adjustable supply current, 15 to 100 mA * Unconditionally stable to 18 GHz with reference design circuit * Small, SC-70 (4-pin, 2.20 x 1.35 x 1.10 mm) Pb-free package (MSL3, 260 C per JEDEC J-STD-020)
Figure 1. SKY65052-372LF Block Diagram
Description
The SKY65052-372LF is a high performance, n-channel lownoise transistor. The device is fabricated from Skyworks advanced depletion mode pHEMT process and is provided in a 2.20 x 1.35 x 1.10 mm, 4-pin SC-70 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. 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.
SOURCE
1
4
GATE
SOURCE
S1417
Figure 2. SKY65052-372LF Pinout - 4-Pin SC-70 (Top View)
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
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DRAIN
2
3
PRELIMINARY DATA SHEET * SKY65052-372LF LOW NOISE TRANSISTOR
Table 1. SKY65052-372LF Signal Descriptions
Pin # 1 2 Name SOURCE DRAIN Description Source lead. Provides DC self-biasing point and AC ground. RF output. Supply voltage required through external RF choke. Pin # 3 4 Name SOURCE GATE Description Source lead. Provides DC self-biasing point and AC ground. RF input
Functional Description
The SKY65052-372LF is a depletion mode pHEMT designed for low noise, high frequency applications. The SKY65052-372LF has a typical NF of 0.6 dB tested at the 2.4 GHz wireless LAN frequency band. A gain of 15.5 dB typical is achieved using the same circuit. If the frequency of operation is lowered to the 1 GHz range, NF performance of the device can approach 0.85 dB including input matching network losses.
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY65052-372LF are provided in Table 2. The recommended operating conditions are specified in Table 3 and electrical specifications are provided in Table 4. Performance characteristics for the SKY65052-372LF are illustrated in Figures 3 through 7.
Table 2. SKY65052-372LF Absolute Maximum Ratings
Parameter Supply voltage Input power Gate to source voltage Gate to drain voltage Drain to source current Gate to drain current Power dissipation Junction temperature Storage temperature Operating temperature Thermal resistance
Note:
Symbol VDD PIN VGS VGD IDS IGD PDIS TJ TSTG TOP JC
Minimum
Typical 6 +15 -5.0 -5.0 110 100 240 150
Maximum
Units V dBm V V mA A mW C C C C/W
-65 -40 220
+125 +85
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.
Table 3. SKY65052-372LF Recommended Operating Conditions
Parameter Operating frequency Supply voltage Supply current f VDD IDD Symbol Minimum 0.45 2.00 15 5.00 55 Typical Maximum 6.0 5.25 100 Units GHz V mA
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PRELIMINARY DATA SHEET * SKY65052-372LF LOW NOISE TRANSISTOR
Table 4. SKY65052-372LF Electrical Specifications (TOP = +25 C, Characteristic Impedance [ZO] = 50 , VDD = 5 V, IDD = 55 mA, Parameters Include Recommended Matching Networks, Unless Otherwise Noted)
Parameter Saturated drain current Pinchoff voltage Transconductance Symbol IDSS VP gM Test Condition VDS = 6 V, VGS = 0 V VDS = 6 V, IDS = 2.5% of IDSS VDS = 6 V, gM = IDS/VGS, measured at IDS = 20% of IDSS VGD = VGS = -3 V Min 80 -0.95 80 Typical 100 -0.80 120 Max 120 -0.65 160 Units mA V mS
Gate leakage current Noise Figure
IGSS NF1 (Note 1) NF2 (Note 2)
1 0.60 0.85 16 -15 -9 -25
200
A dB dB dB dB dB dB dBm dBm dBm dBm K
Gain Input return loss Output return loss Reverse isolation 3 Order Output Intercept Point 3rd Order Input Intercept Point 1 dB Output Compression Point 1 dB Input Compression Point Stability
rd
|S21| |S11| |S22| |S12| OIP3 IIP3 OP1dB IP1dB Unconditionally stable up to 18 GHz POUT = +5 dBm/tone, 1 MHz spacing POUT = +5 dBm/tone, 1 MHz spacing
+34 +18 +19 +4 >1
Note 1: NF of device only. Input RF connector, board, and input matching network loss de-embedded from measurement. Note 2: 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 , VDD = 5 V, IDD = 55 mA, Includes Recommended 2.4 GHz Matching Network, Unless Otherwise Noted)
18 17
2.0
Small Signal Gain (dB)
16 15 14 13 12 2000
Input Return Loss (dB)
-2.0
-6.0
-10
-14
2200
2400
2600
2800
3000
-18 2000
2200
2400
2600
2800
3000
Frequency (MHz)
Frequency (MHz)
Figure 3. Small Signal Gain vs Frequency Over Temperature (PIN = -20 dBm)
Figure 4. Input Return Loss vs Frequency Over Temperature (PIN = -20 dBm)
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PRELIMINARY DATA SHEET * SKY65052-372LF LOW NOISE TRANSISTOR
0
+2
Output Return Loss (dB)
Reverse Isolation (dB)
-10.0
-2
-20.0
-6
-30
-10
-40
-14
-50 2000
-18
2200 2400 2600 2800 3000
2000
2200
2400
2600
2800
3000
Frequency (MHz)
Frequency (MHz)
Figure 5. Reverse Isolation vs Frequency Over Temperature (PIN = -20 dBm)
Figure 6. Output Return Loss vs Frequency Over Temperature (PIN = -20 dBm)
1.00 0.95
Noise Figure (dB)
0.90 0.85 0.80 0.75 0.70 1800
2000
2200
2400
2600
Frequency (MHz)
Figure 7. Noise Figure vs Frequency, Input RF Connector and Board Trace De-Embedded From Measurement
Evaluation Board Description
The SKY65052-372LF Evaluation Board is used to test the performance of the SKY65052-372LF low noise transistor. An assembly drawing for the Evaluation Board is shown in Figure 8. The Evaluation Board schematic diagram is shown in Figure 9. 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.
Board material is 10 mil VT47 FR4 with 1 oz. copper cladding. The RF traces are 50 . 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 * sales@skyworksinc.com * www.skyworksinc.com
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PRELIMINARY DATA SHEET * SKY65052-372LF LOW NOISE TRANSISTOR
S1511
Figure 8. SKY65052-372LF Evaluation Board Assembly Diagram
C11 C12 L4 C1 L2 C2 L1 C6 C4 C14 L3 C5 R1 C10 C7 C15 R2 C3 C13
L5
RF Output
L6
RF Input
VDD
S1509
Figure 9. SKY65052-372LF Evaluation Board Schematic
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
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PRELIMINARY DATA SHEET * SKY65052-372LF LOW NOISE TRANSISTOR
Table 5. SKY65052-372LF Evaluation Board Bill of Materials
Component C1 C2 C3 C4, C5, C8, C9, C14 C6 C7 C10 C11 C12 C13 C15 L1 L2 L3 L4 L5 L6 R1 R2 33 pF 1.2 pF 0.3 pF DNP 10000 pF 10000 pF 10000 pF 4.7 pF 0.3 pF 3.9 pF 1000 pF 12 nH 2 nH DNP 5.6 nH 0 6.8 nH 4.7 7.5 0402 0402 0402 0402 0402 Coilcraft HP Panasonic Taiyo Yuden HK Panasonic Panasonic 0402 0402 0402 0402 0402 0402 0402 0402 0402 Murata GRM015 Murata GRM015 Murata GRM015 Murata GJM015 Murata GJM015 Murata GRM015 Murata GRM015 Coilcraft HP Coilcraft HP Value 0402 0402 0402 Size Manufacturer/Part Series Murata GRM015 Murata GJM015 Murata GJM015
Package Dimensions
The PCB layout footprint for the SKY65052-372LF is shown in Figure 10. Typical case markings are shown in Figure 11. Package dimensions for the 4-pin SC-70 are shown in Figure 12, and tape and reel dimensions are provided in Figure 13.
THE SKY65052-372LF 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.
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.
Electrostatic Discharge (ESD) Sensitivity
The SKY65052-372LF is a static-sensitive electronic device. Do not operate or store near strong electrostatic fields. Take proper ESD precautions.
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
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PRELIMINARY DATA SHEET * SKY65052-372LF LOW NOISE TRANSISTOR
Exposed Solder Areas (Hatched Areas)
0.650
Package Outline
4X 0.750
4X 0.450
3X 0.400 0.500
All dimensions are in millimeters
0.822
S1408
Figure 10. SKY65052-372LF PCB Layout Footprint
** TBD **
Figure 11. Typical Case Markings (Top View)
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
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PRELIMINARY DATA SHEET * SKY65052-372LF LOW NOISE TRANSISTOR
1.80/2.20
0.65 0.65
0.10/0.30
1.80/2.40
1.15/1.35
Pin 1 0.15/0.30
0.5
0.10/0.40 0.10/0.18
0.575/0.700
0.80/1.00
0.80/1.10
A
Pin 1
0.00/0.10
0.10 A
Dimensioning and tolerancing according to ASME Y14.5M-1994. All measurements are in millimeters
S1409
Figure 12. SKY65052-372LF 4-Pin SC-70 Package Dimensions
4.00 0.25 0.05 4.00 (See Note 1) 2.00 0.05 (See Note 3) 1.50 + 0.10/-0.0 1.00 Min. 1.75 0.10
A
R0.20 Max
0.75
3.50 0.05 (See Note 3)
Bo Ko (0.55) Ao R0.25 Typ.
A
A
0.70
Notes: 1. 10 sprocket hole pitch cumuilative tolerance 0.2. 2. Camber in compliance with EIA 481. 3. Pocket position relative to sprocket hole measured as true position of pocket, not pocket hole. 4. Ao and Bo are calculated on a plane at a distance "R" above the bottom of the pocket. 5. Carrier tape: black conductive polycarbonate or polystyrene. 6. Cover tape material: transparent conductive PSA. 7. Cover tape size: 21.3mm width. 8. All measurements are in millimeters.
Ao = 2.35 Bo = 2.55 Ko = 1.25
S1510
Figure 13. SKY65052-372LF Tape and Reel Dimensions
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8.0 + 0.3/-0.1
PRELIMINARY DATA SHEET * SKY65052-372LF LOW NOISE TRANSISTOR
Ordering Information
Model Name SKY65052-372LF Low Noise Transistor Manufacturing Part Number SKY65052-372LF (Pb-free package) Evaluation Kit Part Number *** TBD ***
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