DATA SHEET
SKY65708-51: Low-Noise Amplifier Front-End Module with
GPS/GNSS Pre-Filter
Applications
• GPS/GNSS radio receivers
• Smart phones
• Laptop PCs and tablets
Features
• Small signal gain: 14.4 dB typical
• IIP3: +6.5 dBm
• Low Noise Figure: 1.75 dB typical
• Low current consumption
• Input/output impedance internally matched to 50 Ω
• Single DC supply: 1.8 to 3.6 V
• Minimal number of external components required
• Small, MCM (6-pin, 1.7 x 2.3 mm) package (MSL3, 260 °C per
JEDEC J-STD-020)
Figure 1. SKY65708-51 Block Diagram
Description
The SKY65708-51 is a Front-End Module (FEM) with an integrated
Low Noise Amplifier (LNA) and pre-filter designed for Global
Positioning System/Global Navigation Satellite System
(GPS/GNSS) receiver applications. The device provides high
linearity, excellent gain, a high 1 dB Input Compression Point
(IP1dB), and a superior Noise Figure (NF).
The LNA is fabricated using advanced GaAs pHEMT technology.
The GPS pre-filter provides the low in-band insertion loss and
integrated notch filtering for excellent rejections of the cellular,
PCS, and WLAN frequency bands. The SKY65708-51 uses
Surface Mount Technology (SMT) in the form of a 1.7 x 2.3 mm
Multi-Chip Module (MCM) package, which allows for a highly
manufacturable and low-cost solution.
For applications that require additional rejection for the LTE Band
13, Skyworks SKY65708-11 is the ideal solution.
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.
Figure 2. SKY65708-51 Pinout – 6-Pin MCM
(Top View)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201635F • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • February 8, 2012
1
DATA SHEET • SKY65708-51 LOW-NOISE AMPLIFIER FEM WITH GPS/GNSS FILTER
Table 1. SKY65708-51 Signal Descriptions
Pin #
Name
Description
Pin #
Source voltage
4
Name
FILT_OUT
Description
1
VDD
Filter output
2
VEN
LNA enable
5
LNA_IN
LNA input
3
RF_IN
RF input
6
RF_OUT
RF output
Table 2. SKY65708-51 Absolute Maximum Ratings
Parameter
Symbol
Minimum
Maximum
Units
RF input power
PIN
+10
dBm
Supply voltage
VDD
0
3.6
V
Storage temperature
TSTG
–55
+125
°C
Junction temperature
TJ
+150
°C
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 value. Exceeding any of the limits listed here may result in permanent damage to the device.
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. SKY65708-51 Recommended Operating Conditions
Parameter
Symbol
Frequency range
f
RF input power
PIN
Supply voltage (measured at terminals of
Evaluation Board)
VDD
LNA enable (Note 1):
Enable (high)
Disable (low)
LNAENABLE
LNADISABLE
Case operating temperature
TC
Minimum
Typical
1565
Maximum
Units
1606
MHz
–85
1.80
2.85
dBm
3.60
V
0
0.45
V
V
–40
+85
°C
1.8
Note 1: @ VEN pin of connector J3 on Evaluation Board (see Figure 3) with resistor R1 = 1.2 kΩ.
Technical Description
Electrical and Mechanical Specifications
LNA Enable
The absolute maximum ratings of the SKY65708-51 are provided
in Table 2. The recommended operating conditions are specified
in Table 3 and electrical specifications are provided in Table 4.
The VEN signal (pin 2) enables or disables the LNA. A logic high
signal powers on the LNA and a logic low signal powers off the
device. An external series resistor can be used on this pin to
adjust the LNA bias current.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
2
February 8, 2012 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 201635F
DATA SHEET • SKY65708-51 LOW-NOISE AMPLIFIER FEM WITH GPS/GNSS FILTER
Table 4. SKY65708-51 Electrical Specifications (Note 1)
(VDD = 2.85 V, VEN = 1.8 V, TC= +25 °C, Unless Otherwise Noted)
Parameter
Small signal gain
Symbol
G
Noise Figure
NF
Test Condition
@ 1575.0 MHz
Min
Typical
13.2
14.4
Max
Units
dB
@ 1601.8 MHz
14.0
@ 1575.0 MHz
1.75
dB
@ 1601.8 MHz
1.95
dB
2.40
dB
1 dB Input Compression Point
IP1dB
@ 1575.0 MHz
@ 1601.8 MHz
–4.5
–4.0
dBm
dBm
Third Order Input Intercept Point (in band)
IIP3
f1 = 1575 MHz and
f2 = 1576 MHz
@ PIN = –30 dBm
+6.5
dBm
Third Order Input Intercept Point (in band)
IIP3
f1 = 1601.8 MHz
and
f2 = 1602.8 MHz
@ PIN = –30 dBm
+6
dBm
Cellular band rejection
@ 824.6 MHz
PIN = 0 dBm
–34
dB
DCS band rejection
@ 1712.7 MHz
PIN = 0 dBm
–24
dB
PIN = 0 dBm
WLAN rejection @ 2400 MHz
–34
dB
Reverse isolation
|S12|
21
dB
Input return loss
|S11|
10
dB
Output return loss
|S22|
15
dB
Current consumption (Note 2)
IDD
4.3
mA
Shut down current
ISHUTDOWN
0.5
μA
5
μs
Power gain settling time
Note 1: Performance is guaranteed only under the conditions listed in this Table.
Note 2: Bias resistor value = 1.2 kΩ.
Evaluation Board Description
Package and Handling Information
The SKY65708-51 Evaluation Board is used to test the
performance of the SKY65708-51 LNA. An assembly drawing for
the Evaluation Board is shown in Figure 3. The Evaluation Board
schematic diagram is shown in Figure 4. Table 5 provides the Bill
of Materials (BOM) list for Evaluation Board components.
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.
Package Dimensions
THE SKY65708-51 is rated to Moisture Sensitivity Level 3 (MSL3)
at 260 °C. It can be used for lead or lead-free soldering. For
additional information, refer to the Skyworks Application Note,
PCB Design & SMT Assembly/Rework Guidelines for MCM-L
Packages, document number 101752.
The PCB layout footprint for the SKY65708-51 is provided in
Figure 5. Package dimensions for the 6-pin MCM are shown in
Figure 6, and tape and reel dimensions are provided in Figure 7.
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.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201635F • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • December 8, 201
3
DATA SHEET • SKY65708-51 LOW-NOISE AMPLIFIER FEM WITH GPS/GNSS FILTER
Figure 3. SKY65708-51 Evaluation Board Assembly Diagram
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
4
February 8, 2012 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 201635F
DATA SHEET • SKY65708-51 LOW-NOISE AMPLIFIER FEM WITH GPS/GNSS FILTER
Figure 4. SKY65708-51 Evaluation Board Schematic
Table 5. SKY65708-51 Evaluation Board Bill of Materials
Component
Size
Value
C1
0402
100 pF
C2
0402
1000 pF
L1
0402
10 nH (wire-wound inductor)
L2
0402
4.7 nH (wire-wound inductor)
R1 (Note 1)
0402
0 to 4.7 kΩ
Note 1: The value of R1 can vary between 0 Ω and 4.7 kΩ based on supply current requirements.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201635F • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • December 8, 201
5
DATA SHEET • SKY65708-51 LOW-NOISE AMPLIFIER FEM WITH GPS/GNSS FILTER
Figure 5. SKY65708-51 PCB Layout Footprint
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
6
February 8, 2012 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 201635F
DATA SHEET • SKY65708-51 LOW-NOISE AMPLIFIER FEM WITH GPS/GNSS FILTER
Figure 6. SKY65708-51 6-Pin MCM Package Dimensions
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201635F • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • December 8, 201
7
DATA SHEET • SKY65708-51 LOW-NOISE AMPLIFIER FEM WITH GPS/GNSS FILTER
Figure 7. SKY65708-51 Tape and Reel Dimensions
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
8
February 8, 2012 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 201635F
DATA SHEET • SKY65708-51 LOW-NOISE AMPLIFIER FEM WITH GPS/GNSS FILTER
Ordering Information
Model Name
SKY65708-51 Low-Noise Amplifier FEM with GPS/GNSS
Filter
Manufacturing Part Number
SKY65708-51
Evaluation Board Part Number
TW19-D505-001
Copyright © 2011, 2012 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. Skyworks assumes no responsibility for errors or omissions in these materials or the
information contained herein. Skyworks may change its documentation, products, services, specifications or product descriptions at any time, without notice. Skyworks makes no commitment to
update the materials or information and shall have no responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from any future changes.
No license, whether express, implied, by estoppel or otherwise, is granted to any intellectual property rights by this document. Skyworks assumes no liability for any materials, products or
information provided hereunder, including the sale, distribution, reproduction or use of Skyworks products, information or materials, except as may be provided in Skyworks Terms and Conditions of
Sale.
THE MATERIALS, PRODUCTS AND INFORMATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING FITNESS FOR A
PARTICULAR PURPOSE OR USE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHT; ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY
DISCLAIMED. SKYWORKS DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS
SHALL NOT BE LIABLE FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO ANY SPECIAL, INDIRECT, INCIDENTAL, STATUTORY, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION,
LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THE MATERIALS OR INFORMATION, WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the Skyworks products could lead to personal injury,
death, physical or environmental damage. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any
damages resulting from such improper use or sale.
Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifications as a result of design defects, errors, or operation of
products outside of published parameters or design specifications. Customers should include design and operating safeguards to minimize these and other risks. 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 • sales@skyworksinc.com • www.skyworksinc.com
201635F • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • December 8, 201
9