SKYWORKS SKY65038-70LF

DATA SHEET
SKY65038-70LF: 0.25-6.0 GHz Low Noise Amplifier
Applications
x Wireless infrastructure: WLAN, WiMAX, broadband, cellular base
stations
x Test instrumentation
x Cable television
1
Features
2
RF Input
3
Ground
RF Output
x Broadband frequency range: 0.25 to 6.0 GHz
x Gain = 15 dB @ 1 GHz
x Noise Figure = 2 dB @ 1 GHz
x OIP3= +40 dBm
x OP1dB = +21.5 dBm @ 1 GHz
x Wideband 50 Ω output impedance
x Single, +5 V supply
x SOT-89 (4-pin, 2.4 x 4.5 mm) package (MSL1, 260 °C per
JEDEC J-STD-020)
S669
Figure 1. SKY65038-70LF Functional Block Diagram
Description
Skyworks SKY65038-70LF is a general purpose, broadband Low
Noise Amplifier (LNA). The device is fabricated from Skyworks
pHEMT process and packaged in a miniature Small Outline
Transistor (SOT-89) package.
The LNA’s high gain, low noise, and 3rd Order Output Intercept
Point (OIP3) allow the SKY65038-70LF to be used a various
transmitter and receiver application. The device’s 50 Ω output
impedance allows it to be easily cascaded with a simple input
impedance matching network. The typical useable bandwidth of
the SKY65038-70LF is 0.25 to 6.0 GHz.
A functional block diagram is provided in Figure 1. The device
package and pinout are shown in Figure 2.
GND
4
1
2
RF_IN
GND
3
RF_OUT
S244
Figure 2. SKY65038-70LF Pinout – 4-Pin SOT Package
(Top View)
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DATA SHEET • SKY65038-70LF LNA
Functional Description
Electrical and Mechanical Specifications
The SKY65038-70LF is a single stage, low-noise LNA that
operates with a single 5 V power supply connected through an RF
choke (inductor L1) to the output signal (pin 3). The device is
externally RF matched using surface mount components to
facilitate operation over a frequency range of 0.25 to 6.0 GHz.
Signal pin assignments and functional pin descriptions are
described in Table 1. The absolute maximum ratings of the
SKY65038-70LF are provided in Table 2. The recommended
operating conditions are specified in Table 3 and electrical
specifications are provided in Table 4.
Typical performance characteristics of the SKY65038-70LF are
illustrated in Figures 3 through 9.
Table 1. SKY65038-70LF Signal Descriptions
Pin #
Name
Description
1
RF_IN
RF input
2
GND
Ground
3
RF_OUT
RF output
4
GND
Ground
Table 2. SKY65038-70LF Absolute Maximum Ratings
Parameter
Symbol
Min
Typical
Max
6
Units
Supply voltage
VDD
V
RF input power
PIN
Operating case temperature
TC
–40
+85
°C
Storage temperature
TST
–65
+125
°C
+10
dBm
Junction temperature
TJ
150
°C
Thermal resistance
ΘJC
53
°C/W
Note:
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 values.
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. SKY65038-70LF Recommended Operating Conditions
Parameter
Symbol
Min
Operating frequency
f
0.25
Supply voltage
VDD
3.0
Typical
5.0
Max
Units
6.0
GHz
5.5
V
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DATA SHEET • SKY65038-70LF LNA
Table 4. SKY65038-70LF Electrical Characteristics (Note 1)
(VDD = +5 V, TC = 25 °C, Characteristic Impedance [ZO] = 50 Ω, f = 1 GHz, Tested With Unmatched Device, Unless Otherwise Noted)
Parameter
Symbol
Noise Figure
NF
Small signal gain
|S21|
Input return loss
Test Conditions
Min
Typical
Max
Units
2
dB
f = 1 GHz
f = 2 GHz
f = 6 GHz
15.0
13.5
8.5
dB
dB
dB
|S11|
f = 0.25 to 1.0 GHz
f = 1 to 6 GHz
–15
–8
dB
dB
Output return loss
|S22|
f = 0.25 to 6.0 GHz
Reverse isolation
|S12|
Third order output intercept point
OIP3
Output power @ 1 dB compression
OP1dB
Supply current
IDD
10 MHz spacing,
POUT = +5 dBm/tone
+37
110
–20
dB
–20
dB
+40
dBm
+21.5
dBm
150
165
mA
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.
Typical Performance Characteristics
0
20
–2
18
–4
16
Small Signal Gain (dB)
Input Return Loss (dB)
(VDD = +5 V, TC = 25 °C, Characteristic Impedance [ZO] = 50 Ω, IDD = 150 mA, Tested With Unmatched Device, Unless Otherwise Noted)
–6
–8
–10
–12
+85 oC
+25 oC
–40 oC
–14
–16
–18
+85 oC
+25 oC
–40 oC
14
12
10
8
6
4
2
–20
0
0
1000
2000
3000
4000
5000
6000
7000
8000
Frequency (MHz)
Figure 3. Input Return Loss vs Frequency Over Temperature
(PIN = –20 dBm)
0
1000
2000
3000
4000
5000
6000
7000
8000
Frequency (MHz)
Figure 4. Small Signal Gain vs Frequency Over Temperature
(PIN = –20 dBm)
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DATA SHEET • SKY65038-70LF LNA
0
0
+85 C
+25 oC
–40 oC
–10
Output Return Loss (dB)
Reverse Isolation (dB)
–5
–5
o
–15
–20
–25
–30
–35
–40
–10
–15
–20
–25
+85 oC
+25 oC
–40 oC
–30
–35
–40
–45
0
1000
2000
3000
4000
5000
6000
7000
–50
8000
0
1000
2000
3000
Frequency (MHz)
Figure 5. Reverse Isolation vs Frequency Over Temperature
(PIN = –20 dBm)
5000
6000
7000
8000
Figure 6. Output Return Loss vs Frequency Over Temperature
(PIN = –20 dBm)
16.0
7
+85 oC
+25 oC
–40 oC
15.5
6
Noise Figure (dB)
15.0
Gain (dB)
4000
Frequency (MHz)
14.5
14.0
+85 oC
+25 oC
–40 oC
5
4
3
2
13.5
1
13.0
+10
+12
+14
+16
+18
+20
0
+22
0
1000
2000
Output Power (dBm)
Figure 7. Gain vs Output Power Over Temperature
S(2,2)
S(1,1)
3000
4000
Figure 8. Noise Figure vs Frequency Over Temperature
m2
m1
m1
freq = 250.0 MHz
S(1,1) = 0.195 /–78.662
impedance = Z0 x (1.001 – j0.398)
freq (250.0 MHz to 6.0 GHz)
m2
freq = 250.0 MHz
S(2,2) = 0.103 /–99.144
impedance = Z0 x (0.948 – j0.195)
Figure 9. Input and Output Return Loss vs Frequency
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5000
Frequency (MHz)
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6000
DATA SHEET • SKY65038-70LF LNA
Evaluation Board Description
the ground pad to dissipate the maximum wattage produced
to the circuit board. Multiple vias to the grounding layer are
required.
The Skyworks SKY65038-70LF Evaluation Board is used to test
the performance of the SKY65038-70LF LNA. An assembly
drawing for the Evaluation Board is shown in Figure 10.
Instead of using external surface mount components to test the
Evaluation Board, broadband bias Ts were used to highlight the
performance of the device, itself. Evaluation Boards are available
for 250 MHz, 900 MHz, 1900 MHz, and 2100 MHz. Typical
reference schematic diagrams are provided in Figures 11
(250 MHz), 13 (900 MHz), 15 (1900 MHz), and 17 (2100 MHz).
These are relatively wideband circuits that are useful for many
applications.
The following Tables describe the S-parameter performance and
provide the Bill of Materials (BOMs) for the four available
Evaluation Boards:
5. All surface mount components are 0402-sized to reduce
component parasitics. Use of 0603 or larger components is
not recommended.
The different Evaluation Boards for the SKY65038-70LF are
provisioned with two RF connectors and a DC launch. All boards
have space for additional RF matching components. Unused
series locations should be populated with 0 Ω resistors or strip
lines. Unused shunt locations should be left unpopulated.
Components in the feedback path from the RF input to the DC
header should only be used if operating at less than +5 V.
Testing Procedure
Use the following procedure to set up the SKY65038-70LF
Evaluation Board for testing:
250 MHz: Tables 5 and 6.
900 MHz: Tables 7 and 8.
1900 MHz: Tables 9 and 10.
1. Connect RF test equipment to the input/output SMA
connectors.
2100 MHz: Tables 11 and 12.
2. Connect DC ground.
Table 13 provides scattering parameters for 250 MHz up to
6000 MHz, calibrated to package leads.
3. Connect VDD to a +5 V supply with a current of 200 mA.
Verify that the board draws approximately 150 mA.
Biasing
4. Apply an RF signal or noise source.
The voltage supply (VDD) should be applied to the RF_OUT pin
through inductor L2. Decoupling capacitors C3 and C4 should be
placed closely to L2.
Package Dimensions
If a bias level lower than +5 V is used, the feedback resistor R1 is
required. Use the following equation to determine the value of R1
(do not install R1 for +5 V operation):
§ VDD 0.37 ·
¸¸
R1 30 u 10 3 u ¨¨
© VDD 5 ¹
(1)
Circuit Design Configurations
The following design considerations are general in nature and
must be followed regardless of final use or configuration.
1. External components should be placed close to the package
pins to reduce parasitics.
2. Care should be taken to ensure that all RF traces are 50 Ω.
3. Paths to ground should be made as short as possible.
4. The ground pad of the SKY65038-70LF LNA 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
Typical case markings for the SKY65038-70LF are shown in
Figure 19. The PCB layout footprint is shown in Figure 20.
Package dimensions for the 4-pin SOT-89 are provided in
Figure 21, and tape and reel dimensions are shown in Figure 22.
Package and Handling Information
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 SKY65038-70LF is rated to Moisture Sensitivity Level 1
(MSL1) at 260 qC. 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 Tape and Reel, document number 101568.
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DATA SHEET • SKY65038-70LF LNA
S1523
Figure 10. Evaluation Board Assembly Drawing
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DATA SHEET • SKY65038-70LF LNA
250 MHz Application Circuit
+20
+10
VDD
R1
Response (dB)
0
C4
4
1
2
–20
–30
S11
S12
S21
S22
–40
C3
L2
C1
–10
–50
3
L1
–60
RF_IN
RF_OUT
C2
0
250
500
750
Figure 11. SKY65038-70LF Evaluation Board Schematic
(250 MHz)
1000
1250
1500
1750
2000
Frequency (MHz)
S1521
Figure 12. S-Parameters with 250 MHz External Matching
Network
Table 5. Typical 250 MHz Circuit Performance
Parameter
Value
Input Return Loss |S11|
–18 dB
Gain |S21|
15.75 dB
Reverse Isolation |S12|
–20 dB
Output Return Loss |S22|
–20 dB
OIP3
+40 dBm
Table 6. SKY65038-70LF (250 MHz) Evaluation Board Bill of Materials
Component
Value
Manufacturer/Part #
C1
82 pF
Murata GRM1555C1H820JZ01
C2
82 pF
Murata GRM1555C1H820JZ01
C3
10 pF
Murata GRM1555C1H100JZ01
C4
0.1 μF
Murata GRM1555R60J104KA01
L1
15 nH
Taiyo Yuden HK100515NJ
L2
82 nH
Taiyo Yuden HK100582NJ
R1
See Equation (1)
–
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DATA SHEET • SKY65038-70LF LNA
900 MHz Application Circuit
+20
+10
0
Response (dB)
VDD
R1
C4
4
–10
–20
–30
–40
S11
S12
S21
S22
C3
L2
C1
1
2
–50
3
–60
L1
RF_IN
RF_OUT
C2
0
1000
2000
3000
S1521
Figure 13. SKY65038-70LF Evaluation Board Schematic
(900 MHz)
4000
5000
6000
Parameter
Value
Input Return Loss |S11|
–20 dB
Gain |S21|
14.75 dB
Reverse Isolation |S12|
–20 dB
Output Return Loss |S22|
–25 dB
OIP3
+40 dBm
Table 8. SKY65038-70LF (900 MHz) Evaluation Board Bill of Materials
Value
Manufacturer/Part #
C1
10 pF
Murata GRM1555C1H100JZ01
C2
10 pF
Murata GRM1555C1H100JZ01
C3
10 pF
Murata GRM1555C1H100JZ01
C4
0.1 μF
Murata GRM1555R60J104KA01
L1
5.6 nH
Taiyo Yuden HK10055N6S
L2
22 nH
Taiyo Yuden HK100522NJ
R1
See Equation (1)
–
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8000
Figure 14. S-Parameters with 900 MHz External Matching
Network
Table 7. Typical 900 MHz Circuit Performance
Component
7000
Frequency (MHz)
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DATA SHEET • SKY65038-70LF LNA
1900 MHz Application Circuit
VDD
+20
R1
+10
Response (dB)
C4
4
C3
L2
1
C1
2
0
–10
–20
3
RF_IN
RF_OUT
C2
S1522
L3
L1
S11
S12
S21
S22
–30
–40
1000
1500
2000
2500
3000
3500
4000
Frequency (MHz)
Figure 15. SKY65038-70LF Evaluation Board Schematic
(1900 MHz)
Figure 16. S-Parameters with 1900 MHz External Matching
Network
Table 9. Typical 1900 MHz Circuit Performance
Parameter
Value
Input Return Loss |S11|
–17.5 dB
Gain |S21|
13.5 dB
Reverse Isolation |S12|
–20 dB
Output Return Loss |S22|
–18 dB
OIP3
+40 dBm
Table 10. SKY65038-70LF (1900 MHz) Evaluation Board Bill of Materials
Component
Value
Manufacturer/Part #
C1
2.2 pF
Murata GRM1555C1H2R2CZ01
C2
3.3 pF
Murata GRM1555C1H3R3CZ01
C3
10 pF
Murata GRM1555C1H100JZ01
C4
0.1 μF
Murata GRM1555R60J104KA01
L1
3.9 nH
Taiyo Yuden HK10053N9S
L2
22 nH
Taiyo Yuden HK100522NJ
L3
6.8 nH
Taiyo Yuden HK10056N8J
R1
See Equation (1)
–
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DATA SHEET • SKY65038-70LF LNA
2100 MHz Application Circuit
+20
VDD
R1
+10
Response (dB)
C4
4
C3
L2
1
C1
2
0
–10
–20
3
RF_IN
RF_OUT
C2
L1
S1522
L3
S11
S12
S21
S22
–30
–40
1000
1500
2000
2500
3000
3500
4000
Frequency (MHz)
Figure 17. SKY65038-70LF Evaluation Board Schematic
(2100 MHz)
Figure 18. S-Parameters with 2100 MHz External Matching
Network
Table 11. Typical 2100 MHz Circuit Performance
Parameter
Value
Input Return Loss |S11|
–18 dB
Gain |S21|
15.75 dB
Reverse Isolation |S12|
–20 dB
Output Return Loss |S22|
–20 dB
OIP3
+40 dBm
Table 12. SKY65038-70LF (2100 MHz) Evaluation Board Bill of Materials
Component
Value
Manufacturer/Part #
C1
1.8 pF
Murata GRM1555C1H1R8CZ01
C2
3.3 pF
Murata GRM1555C1H3R3CZ01
C3
10 pF
Murata GRM1555C1H100JZ01
C4
0.1 μF
Murata GRM1555R60J104KA01
L1
3.9 nH
Taiyo Yuden HK10053N9S
L2
22 nH
Taiyo Yuden HK100522NJ
L3
6.8 nH
Taiyo Yuden HK10056N8J
R1
See Equation (1)
–
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DATA SHEET • SKY65038-70LF LNA
Table 13. Device S-Parameters Calibrated to Package Leads (VDD = +5 V, IDD = 150 mA)
Freq
(MHz)
S11 (dB)
S11 (ang)
S21 (dB)
S21 (ang)
S12 (dB)
S12 (ang)
S22 (dB)
S22 (ang)
250
–14.32
–79.08
15.77
156.66
–19.33
1.19
–20.04
–100.02
500
–16.02
–93.74
15.39
147.98
–19.33
–10.54
–32.87
–140.85
750
–15.51
–110.59
15.19
136.65
–19.40
–19.14
–32.61
92.85
1000
–14.52
–127.62
14.98
124.78
–19.51
–26.89
–26.30
65.55
1250
–13.48
–143.76
14.74
112.73
–19.66
–34.19
–23.28
50.90
1500
–12.43
–159.87
14.47
100.20
–19.81
–41.57
–21.41
38.39
1750
–11.50
–174.51
14.19
88.34
–19.98
–48.37
–20.18
28.05
2000
–10.67
171.57
13.89
76.59
–20.16
–55.04
–19.45
18.39
2250
–9.93
158.31
13.57
65.05
–20.37
–61.37
–18.93
9.50
2500
–9.23
145.00
13.22
53.17
–20.57
–68.04
–18.70
0.40
2750
–8.62
132.83
12.89
41.96
–20.78
–74.24
–18.67
–7.95
3000
–8.07
121.02
12.54
30.91
–20.97
–80.10
–18.75
–15.52
3250
–7.55
109.65
12.20
20.03
–21.21
–86.03
–19.07
–23.18
3500
–7.08
98.74
11.85
9.29
–21.39
–91.71
–19.53
–29.87
3750
–6.62
87.70
11.48
–1.84
–21.62
–97.49
–20.23
–36.11
4000
–6.21
77.37
11.14
–12.33
–21.86
–102.95
–21.16
–41.42
4250
–5.83
67.27
10.79
–22.73
–22.08
–108.07
–22.22
–45.74
4500
–5.47
57.47
10.45
–33.07
–22.30
–113.24
–23.66
–47.75
4750
–5.13
47.48
10.08
–43.78
–22.52
–118.11
–25.38
–46.29
5000
–4.83
38.15
9.74
–53.93
–22.75
–122.70
–27.22
–38.86
5250
–4.55
28.99
9.39
–64.06
–22.90
–127.21
–28.56
–22.36
5500
–4.30
20.01
9.03
–74.03
–23.05
–131.10
–28.10
–0.97
5750
–4.06
10.76
8.67
–84.43
–23.22
–134.97
–25.81
13.20
6000
–3.85
2.15
8.31
–94.37
–23.22
–138.54
–23.40
18.50
Note:
S-parameters for additional frequencies are available. Refer to the Designer Info S2P file posted on www.skyworksinc.com (see Technical Documents or the SKY65038-70LF product
page).
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DATA SHEET • SKY65038-70LF LNA
Skyworks P/N
YY = Calendar Year
WW = Work Week
SK038
YYWW
Figure 19. SKY65038-70LF Typical Case Markings
1.73
2X 1.50
0.86
R0.254 Typ.
2.70
Exposed Soldering
Area Typ.
4.55
Pin 1
1.40
0.42
0.42
0.50
S1524
Figure 20. SKY65038-70LF PCB Layout Footprint
4.50 ± 0.10
0.381 ± 0.025
Sharp
R0.10
R0.25
1.70 ± 0.05
1.50
7o
7o
2.44 ± 0.10
4.09 ± 0.10
0.51 ± 0.10
R0.10
1.04 ± 0.15
0.46
1.50 ± 0.10
0.41
Side View
End View
Bottom View
S253
All measurements are in millimeters
Figure 21. SKY65038-70LF 4-Pin SOT-89 Package Dimensions
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DATA SHEET • SKY65038-70LF LNA
2.00 ± 0.05
8.00 ± 0.10
4.00 ± 0.10
∅1.50 ± 0.10
1.75 ± 0.10
0.30 ± 0.05
B
Pin #1
Indicator
7° Max
5.50 ± 0.05
12.0 ± 0.30
A
A
4.90 ± 0.10
B
1.90 ± 0.10
∅1.00 Min.
4.60 ± 0.10
B
Notes:
1. Carrier tape material: black conductive polycarbonate
2. Cover tape material: transparent conductive PSA
3. Cover tape size: 9.2 mm width
4. All measurements are in millimeters
8° Max
S264
Figure 22. SKY65038-70LF Tape and Reel Dimensions
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200794C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • November 9, 2009
13
DATA SHEET • SKY65038-70LF LNA
Ordering Information
Model Name
SKY65038-70LF Low Noise Amplifier
Ordering Part Number
SKY65038-70LF (Pb-free package)
Evaluation Kit Part Number
SKY65038-70LF (250 MHz)
SKY65038-70LF (900 MHz)
SKY65038-70LF 1900 MHz)
SKY65038-70LF (2100 MHz)
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November 9, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200794C