SKYWORKS SKY65047

PRELIMINARY DATA SHEET
SKY65047-360LF: 0.4-3.0 GHz Low Noise Amplifier
Applications
Description
• Wireless infrastructure: WLAN, WiMAX, broadband, cellular base
stations
• Test instrumentation
• Satellite receivers
• Paging
• Remote metering
• WLL and ISM receivers
• GPS receivers
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).
Features
• Noise Figure = 0.90 dB @ 915 MHz
• Noise Figure = 0.75 dB @ 1575 MHz
• Noise Figure = 0.95 dB @ 2450 MHz
• Small signal gain = 16.5 dB @ 1575 MHz
• Low operating current = 6.7 mA
• External, adjustable bias setting
• Built-in power-down control
• Single DC supply voltage, 2.7 V to 3.8 V
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.
• Miniature, DFN (8-pin, 2 x 2 mm) Pb-free package (MSL1,
260 °C per JEDEC J-STD-020)
Skyworks offers lead (Pb)-free RoHS (Restriction of
Hazardous Substances) compliant packaging.
Enable
EN
GND
1
8
EN
RF_IN
2
7
RF_OUT/BIAS
GND
3
6
BIAS_R
GND
4
5
VBIAS
RF_OUT/BIAS
RF_IN
Bias
BIAS_R
VBIAS
S1486
S1487
Figure 1. SKY65047-360LF Block Diagram
Figure 2. SKY65047-360LF Pinout – 8-Pin QFN
(Top View)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201084A • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • June 1, 2009
1
PRELIMINARY DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER
Table 1. SKY65047-360LF Signal Descriptions
Pin #
Name
1
GND
2
3
4
Description
Pin #
Name
Description
Ground
5
VBIAS
RF_IN
RF input
6
BIAS_R
Bias reference voltage
GND
Ground
7
RF_OUT/BIAS
RF output/VCC bias
GND
Ground
8
EN
Amplifier enable control
Functional Description
VCC bias voltage
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.
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
Storage temperature
TSTG
Junction temperature
TJ
Case temperature
TCASE
Note:
Symbol
Minimum
Typical
–65
–40
+20
dBm
+125
°C
+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.
Table 3. SKY65047-360LF Recommended Operating Conditions
Parameter
Frequency
Symbol
f
Minimum
0.4
RF input power
PIN
Bias supply voltage (Note 1)
VBIAS
2.7
Amplifier enable control (on)
EN_ON
VCC–0.3
Amplifier enable control (off)
EN_OFF
Operating temperature
TOP
Typical
3.3
0
–40
+25
Maximum
Units
3.0
GHz
–20
dBm
3.8
V
VCC
V
0.2
V
+85
°C
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
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PRELIMINARY DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER
Table 4. SKY65047-360LF Electrical Specifications
(VBIAS and EN = 3.3 V, Characteristic Impedance [ZO] = 50 Ω, TCASE = 25 °C, Unless Otherwise Noted)
Parameter
Gain temperature drift
Symbol
G
Test Condition
25 °C to –40 °C or 25 °C
to +85 °C
Min
Typical
Max
Units
±0.5
dB
17.3
dB
915 MHz Matched Performance
Gain
G
Isolation
Iso
27
dB
Noise Figure
NF
0.90
dB
1 dB input compression point
IP1dB
Input IP3
IIP3
PIN = –30 dBm/tone,
200 kHz spacing
–15.8
dBm
+3
dBm
Input return loss
IRL
With external matching
14
dB
Output return loss
ORL
With external matching
18
dB
Supply current
ICC
Bias resistor = 4.7 kΩ
7.0
mA
1575 MHz Matched Performance
Gain
G
16.5
dB
Isolation
Iso
26
dB
Noise Figure
NF
0.75
dB
1 dB input compression point
IP1dB
–15
dBm
Input IP3
IIP3
PIN = –30 dBm/tone,
200 kHz spacing
0
dBm
Input return loss
IRL
With external matching
11
dB
Output return loss
ORL
With external matching
13
dB
Supply current
ICC
Bias resistor = 4.7 kΩ
6.7
mA
15.7
dB
2450 MHz Matched Performance
Gain
G
Isolation
Iso
21
dB
Noise Figure
NF
0.95
dB
1 dB input compression point
IP1dB
–8
dBm
Input IP3
IIP3
+6.5
dBm
PIN = –30 dBm/tone,
200 kHz spacing
Input return loss
IRL
With external matching
21
dB
Output return loss
ORL
With external matching
13
dB
Supply current
ICC
Bias resistor = 4.7 kΩ
6.8
mA
Ilkg
No RF
0.1
μA
Power-Down
Leakage current
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201084A • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • June 1, 2009
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PRELIMINARY 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 10,
12, and 14. Assembly drawings for the Evaluation Board are
shown in Figures 11, 13, and 15.
Evaluation Board layer detail drawings for the 915 MHz,
1575 MHz, and 2450 MHz boards are shown in Figures 16, 17,
and 18, respectively. Layer detail physical characteristics are
noted in Figure 19.
Circuit Design Considerations
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.
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.
VBIAS (pin 5). The bias supply voltage for the LNA is typically set
to +3.3 V using a bias resistor.
BIAS_R (pin 6). This pin is typically connected to +3.3 V through
a bias resistor.
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 20. Typical case markings are shown in Figure 21.
Package dimensions for the 8-pin DFN are shown in Figure 22,
and tape and reel dimensions are provided in Figure 23.
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.
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.
Application Circuit Notes
Center Ground. It is extremely important to sufficiently ground
the bottom ground pad of the device for both thermal and stability
reasons. Multiple small vias are acceptable and will work well
under the device if solder migration is an issue.
Electrostatic Discharge (ESD) Sensitivity
The SKY65047-360LF 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 • [email protected] • www.skyworksinc.com
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PRELIMINARY DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER
Optional Decoupling
Capacitors
Enable
C9
1 μF
VCC
8
1
GND
C4
22 nF
L1
6.8 nH
EN
RF_IN
C3
0.7 pF
C13
10 nF
RF_OUT/BIAS
C16
1 μF
RF Output
3
C5
2.2 pF
6
GND
BIAS_R
5
4
L6
1 nH
C12
56 pF
L3
12 nH
7
2
RF Input
R3
180 Ω
GND
R1
4.7 kΩ
VBIAS
VCC
S1497
Figure 10. SKY65047-360LF Evaluation Board Schematic
(915 MHz)
C15
C17
L10
R5
J3
J4
L8
R6
L9
C16
R4
C14
L7
C10 C9
J1
C2 L1 C3 C4
R2
C5
L3
C1
L6
R1 C11
C8
L2
C7
C6
R3
C12
C13
J2
R9
R8
L4
L5
P1
S1489
Figure 11. SKY65047-360LF Evaluation Board Assembly Diagram
(915 MHz)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201084A • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • June 1, 2009
5
PRELIMINARY DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER
Optional Decoupling
Capacitors
Enable
C7
1 μF
VCC
8
1
GND
C1
22 nF
L1
2.7 nH
EN
C4
22 pF
L2
8.2 nH
C5
10 nF
C8
1 μF
7
2
RF_IN
RF Input
R2
180 Ω
RF_OUT/BIAS
3
RF Output
C3
3.6 pF
6
GND
BIAS_R
5
4
GND
R1
4.7 kΩ
VBIAS
VCC
S1498
Figure 12. SKY65047-360LF Evaluation Board Schematic
(1575 MHz)
C9
L5
J3
J4
R4
R3
C8
C7
C3
C1 C2 L1
J1
R1 C6
J2
C4
C5
R5
R6
L3
L4
P1
S1490
Figure 13. SKY65047-360LF Evaluation Board Assembly Diagram
(1575 MHz)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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PRELIMINARY DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER
Optional Decoupling
Capacitors
Enable
C9
1 μF
VCC
GND
L1
1.8 nH
C4
22 nF
EN
C16
1 μF
7
RF_IN
C2
1.1 pF
C13
10 nF
L3
68 nH
2
RF Input
C12
10 pF
8
1
RF_OUT/BIAS
RF Output
3
6
GND
BIAS_R
GND
VBIAS
5
4
R2
130 Ω
R1
4.7 kΩ
C5
22 pF
L2
1.5 pF
C6
3.3 nH
L7
12 nH
VCC
C14
10 nF
Note: Some component labels may be different than the
corresponding component symbol shown here.
Component values, however, are accurate as of the
date of this Data Sheet.
S1499
Figure 14. SKY65047-360LF Evaluation Board Schematic
(2450 MHz)
C17
C15
L10
R5
J3
J4
L8
R6
C16
R4
C10
J1
L1
C1
R2
C5
C4
L3
C3
C2
C14
L7
C9
R1
C11
L2
C8
C6
R3
C12
C13
J2
C7
R9
R8
L4
L5
P1
S1491
Figure 15. SKY65047-360LF Evaluation Board Assembly Diagram
(2450 MHz)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201084A • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • June 1, 2009
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PRELIMINARY DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER
Layer 1: Top – Metal
Layer 2: Ground
Layer 3: Power Plane
Layer 4: Solid Ground Plane
S1492
Figure 16. SKY65047-360LF Evaluation Board Layer Detail
(915 MHz)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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PRELIMINARY DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER
Layer 1: Top – Metal
Layer 2: Ground
Layer 3: Power Plane
Layer 4: Solid Ground Plane
S1493
Figure 17. SKY65047-360LF Evaluation Board Layer Detail
(1575 MHz)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201084A • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • June 1, 2009
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PRELIMINARY DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER
Layer 1: Top – Metal
Layer 2: Ground
Layer 3: Power Plane
Layer 4: Solid Ground Plane
S1494
Figure 18. SKY65047-360LF Evaluation Board Layer Detail
(2450 MHz)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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PRELIMINARY DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER
Cross Section
Name Thickness (mm)
Material
Top solder mask
L1
Laminate
L2
Laminate
L3
Laminate
L4
0.025 min.
Cu, 1 oz.
0.400 ± 0.025
Rogers 4003
0.025 min.
Cu, 1 oz
0.400 ± 0.040
Prepreg
0.025 min.
Cu, 1 oz
0.400 ± 0.025 Glass reinforced core
0.025 min.
Cu, 1 oz
Bottom solder mask
S1495
Figure 19. Layer Detail Physical Characteristics
8X 0.70
8X 0.45
R0.20
Pin 1
8X 0.25
0.50 Pitch
2X 0.85
0.25
2X 0.45
Exposed Solder Areas
(Typical)
All dimensions are in millimeters
S1413
Figure 20. SKY65047-360LF PCB Layout Footprint
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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PRELIMINARY DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER
Pin 1
Indicator
Skyworks Part #
S47
S1488
Figure 21. Typical Case Markings
(Top View)
0.90 +0.10/–0.15
C
2
0.20 Ref
Seating Plane
A
B
0.45 +0.05/–0.07
Exposed Pad
Detail A
0.02 +0.03/–0.02
Pin 1
Indicator
-B-
2
0.15 C
2X
8X
3
0.08 C
Detail C
0.90 ± 0.10
0.15 C
2X
1.70 +0.10/–0.15
0.85 +0.05/–0.07
Detail B
2 Places
0.10 C
Top View
Side View
Bottom View
R0.12 Typ
0.25
0.30 ± 0.10
-A-
CL
R0.20
0.5
0.25 +0.05/–0.07 5
0.10 M C A B
0.05 M C
Detail C
8 Places
Detail B
Detail A
All measurements are in millimeters.
Dimensioning and tolerancing according to ASME Y14.5M-1994.
Coplanarity applies to the exposed heat sink slug as well as the terminals..
Plating requirement per source control drawing (SCD) 2504.
Dimension applies to metalized terminal and is measured between 0.15 mm and 0.30 mm from terminal tip.
Figure 22. SKY65047-360LF 8-Pin DFN Package Dimensions
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S1415
PRELIMINARY DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER
∅1.50+ P0.10/–0.00
0.30 ± 0.01 (T)
4.00 ± 0.10
Pin #1
4.00 ± 0.10
2.00 ± 0.05
1.75 ± 0.10
B
A
B
1.20 ± 0.10 (Ko)
8.00 +0.30/–0.10
A
3.50 ± 0.05
2.60 ± 0.10 (Bo)
R0.30 Max
∅1.00 Min.
2.60 ± 0.10 (Ao)
B
R0.30 Max
A
Notes:
1. Carrier tape: black conductive polystyrene.
2. Cover tape material: transparent conductive HSA.
3. Cover tape size: 5.40 mm width.
4. All measurements are in millimeters.
S1480
Figure 23. SKY65047-360LF Tape and Reel Dimensions
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201084A • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • June 1, 2009
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PRELIMINARY DATA SHEET • SKY65047-360LF LOW NOISE AMPLIFIER
Ordering Information
Model Name
SKY65047-360LF Low Noise Amplifier
Manufacturing Part Number
SKY65047-360LF (Pb-free package)
Evaluation Kit Part Number
TW17-D900 (915 MHz)
TW17-D910 (1575 MHz)
TW17-D920 (2450 MHz)
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