DATA SHEET
SKY65605-21: BDS/GPS/GNSS Low-Noise Amplifier
Applications
BDS/GPS/GNSS radio receivers
Global Navigation Satellite Systems (GLONASS)
Smartphones
Tablet/laptop PCs
Personal navigation devices
RF_IN
Input
Match
Enable
Output
Match
Y2224
VCC
VEN
LNA
RF_OUT
Features
Small signal gain: 19 dB typical
High in-band IIP3: –5 dBm
Low noise figure: 0.6 dB typical
High IP1dB: –14.5 dBm
Low current consumption: 3.6 mA
Input/output impedance internally matched to 50
Ω
Single DC supply: 1.8 to 2.85 V
Minimal number of external components required
Ultra-small QFN (6-pin, 0.7 x 1.1 mm) package
(MSL1, 260
C
per JEDEC J-STD-020)
Figure 1. SKY65605-21 Block Diagram
Description
The SKY65605-21 is a Microwave Monolithic Integrated Circuit
(MMIC) front-end low-noise amplifier (LNA) designed for BeiDou
Satellite Navigation System/Global Positioning System/Global
Navigation Satellite System (BDS/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 SKY65605-21 is optimized to operate from 1.559 to
1.606 GHz, which makes it ideal for BDS/GPS/GNSS radio
receiver applications.
The SKY65605-21 is fabricated using advanced SiGe BiCMOS
technology. The LNA uses surface-mount technology (SMT) in the
form of a 0.7 x 1.1 mm Quad Flat No-Lead (QFN) package, which
allows for a highly manufacturable and low-cost 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.
Skyworks Green
TM
products are compliant with
all applicable legislation and are halogen-free.
For additional information, refer to
Skyworks
Definition of Green
TM
, document number
SQ04–0074.
VEN
RF_IN
5
GND
6
4
1
2
3
Y0213
GND
VCC
RF_OUT
Figure 2. SKY65605-21 Pinout
(Top View)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
203118D • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • August 19, 2015
1
DATA SHEET • SKY65605-21: LOW-NOISE AMPLIFIER
Table 1. SKY65605-21 Signal Descriptions
Pin
1
2
3
GND
VCC
RF_OUT
Name
Ground
Source voltage
RF output
Description
Pin
4
5
6
GND
RF_IN
VEN
Name
Ground
RF input
LNA enable
Description
Technical Description
Power Shutdown
The VEN signal (pin 6) enables or disables the LNA DC power. A
logic high signal powers on the LNA and a logic low signal powers
off the device.
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY65605-21 are provided
in Table 2. The recommended operating conditions are specified
in Table 3 and electrical specifications are provided in Tables 4
and 5.
Table 2. SKY65605-21 Absolute Maximum Ratings (Note 1)
Parameter
RF input power
Supply voltage
Storage temperature
Junction temperature
Case operating temperature
P
IN
V
CC
T
STG
T
J
T
C
–40
0
–55
Symbol
Minimum
Maximum
+10
3.1
+125
+150
Units
dBm
V
C
C
+85
Note 1:
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. SKY65605-21 Recommended Operating Conditions
Parameter
Frequency range
Supply voltage (measured at terminals of the
Evaluation Board)
LNA enable:
Enable (high)
Disable (low)
f
V
CC
1.50
LNA
ENABLE
LNA
DISABLE
1.5
0
1.80
2.85
V
CC
0.3
V
V
V
Symbol
Minimum
1559
Typical
1575
Maximum
1606
Units
MHz
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
2
August 19, 2015 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 203118D
DATA SHEET • SKY65605-21: LOW-NOISE AMPLIFIER
Table 4. SKY65605-21 Electrical Specifications (Note 1)
(V
CC
= 2.85 V, VEN = 1.5 V, f = 1575 MHz, T
C
= +25
C,
Unless Otherwise Noted)
Parameter
Small signal gain
1 dB input compression point
Noise figure
In-band third order input intercept point
Out-of-band third order input intercept point
Reverse isolation
Input return loss
Output return loss
Supply current
Shutdown current
Symbol
|S
21
|
IP1dB
NF
IIP3
OOB-IIP3
|S
12
|
|S
11
|
|S
22
|
I
CC
I
LEAK
f1 = 1575 MHz, P1 = –30 dBm
f2 = 1574 MHz, P2 = –30 dBm
f1 = 1713 MHz, P1 = –20 dBm
f2 = 1851 MHz, P2 = –20 dBm
P
IN
= –30 dBm
P
IN
= –30 dBm
P
IN
= –30 dBm
Test Condition
P
IN
= –30 dBm
Min
17
Typical
19
–14.5
0.6 (Note 2)
–5
–2
37
7.5
10
3.5
0.1
4.5
1.0
Max
21
Units
dB
dBm
dB
dBm
dBm
dB
dB
dB
mA
μA
Note 1:
Performance is guaranteed only under the conditions listed in this table.
Note 2:
0.1dB has been de-embedded for input connector and trace loss.
Table 5. SKY65605-21 Electrical Specifications (Note 1)
(V
CC
= 1.8 V, VEN = 1.5 V, f = 1575 MHz, T
C
= +25
C,
Unless Otherwise Noted)
Parameter
Small signal gain
1 dB input compression point
Noise figure
In-band third order input intercept point
Out-of-band third order input intercept point
Reverse isolation
Input return loss
Output return loss
Supply current
Shutdown current
Symbol
|S
21
|
IP1dB
NF
IIP3
OOB-IIP3
|S
12
|
|S
11
|
|S
22
|
I
CC
I
LEAK
f1 = 1575 MHz, P1 = –30 dBm
f2 = 1574 MHz, P2 = –30 dBm
f1 = 1713 MHz, P1 = –20 dBm
f2 = 1851 MHz, P2 = –20 dBm
P
IN
= –30 dBm
P
IN
= –30 dBm
P
IN
= –30 dBm
Test Condition
P
IN
= –30 dBm
f = 1575.0 MHz
Min
17
Typical
18.5
–16 (Note 2)
0.65
–7
–5
37
7
10
3.3
0.1
4.5
1.0
Max
20.5
Units
dB
dBm
dB
dBm
dBm
dB
dB
dB
mA
μA
Note 1:
Performance is guaranteed only under the conditions listed in this table.
Note 2:
0.1dB has been de-embedded for input connector and trace loss.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
203118D • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • August 19, 2015
3
DATA SHEET • SKY65605-21: LOW-NOISE AMPLIFIER
Evaluation Board Description
The SKY65605-21 Evaluation Board is used to test the
performance of the SKY65605-21 LNA. Figure 3 shows the
Evaluation Board schematic, and Table 6 lists the Bill of Materials
(BOM) for the SKY65605-21. Figure 4 shows the Evaluation Board
assembly drawing.
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 SKY65605-21 is rated to Moisture Sensitivity Level 1 (MSL1)
at 260
C.
It can be used for lead or lead-free soldering. For
additional information, refer to the Skyworks Application Note,
Solder Reflow Information,
document number 200164.
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.
Package Dimensions
Typical part markings are shown in Figure 5. Package dimensions
for the SKY65605-21 are shown in Figure 6, and tape and reel
dimensions are provided in Figure 7.
RF IN
3
GND
C2
(optional)
100 pF
RFI
50
Ω
EN
VSD
6
1
5 2
43
LNA_BIASGND
LNA_BIASVCC
LNA_OUTPUT
1
J2
2
GND
RFIN
LNA_INPUT
L1
6.2
nH (high Q)
VCC
C1
3.9 pF
2
GND
GND
RF OUT
J1
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
RFO
50
Ω
1
3
GND
5 Pin DC Header
1
2
3
4
5
VCC
EN
Y0211
Figure 3. SKY65605-21 Evaluation Board Schematic
Table 6. SKY65605-21 Bill of Materials for the Evaluation Board
Part Number
C1
C2 (optional)
L1
3.9 pF
100 pF
6.2 nH
Value
0402
0402
0402
Size
Capacitor
Capacitor
Wire-wound HiQ inductor
Notes
Note 1:
The C1 and C2 capacitors can use a 0201 size as an alternative.
Note 2:
The C2 capacitor is optional if there is no DC present at the RF input.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
4
August 19, 2015 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 203118D
DATA SHEET • SKY65605-21: LOW-NOISE AMPLIFIER
Y0637
Figure 4. SKY65605-21 Evaluation Board Assembly Drawing
Skyworks
Part Number
Y1944
Pin 1
Indicator
Underscore
Figure 5. SKY65605-21 Typical Part Marking
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
203118D • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • August 19, 2015
5
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