DATA SHEET
SKY67103-396LF: 0.5 to 4.0 GHz High Linearity, Active Bias
Low-Noise Amplifier
Applications
LTE, GSM, WCDMA, HSDPA macro base stations
Small cells
Cellular repeaters, DAS, and RRH/RRUs
0.5 to 4.0 GHz low-noise receivers
High-temperature receiver applications to +105
°C
Improved high-frequency performance and footprint compatible
with several industry standard low-noise amplifiers
RF_IN
RF_OUT/VDD
FEEDBACK
RFGND
Active
Bias
VIN
S1942
Features
High gain:
25 dB @ 0.85 GHz
20 dB @ 1.85 GHz
18.2 dB @ 2.6 GHz
16.5 dB @ 3.6 GHz
Low noise figure:
0.5 dB @ 0.85 GHz
0.6 dB @ 1.85 GHz
0.65 dB @ 2.6 GHz
0.7 dB @ 3.6 GHz
High IIP3 performance: +17.8 dBm @ 3.6 GHz
Return loss > 17.5 dB @ 3.6 GHz
Adjustable supply current and gain
Flexible bias voltage: 3 to 5 V
Adjustable supply current from 30 mA to 100 mA
Temperature and process-stable active bias
Miniature DFN (8-pin, 2 x 2 mm) package (MSL1 @ 260
C
per
JEDEC J-STD-020)
Skyworks Green™
products are compliant with
all applicable legislation and are halogen-free.
For additional information, refer to
Skyworks
Definition of Green™,
document number
SQ04-0074.
Figure 1. SKY67103-396LF Block Diagram
Description
The SKY67103-396LF low-noise amplifier (LNA) with an active
bias offers excellent return loss, low noise, and high linearity
performance.
The internal active bias circuitry provides stable performance over
temperature and process variation. The device offers the ability to
externally adjust supply current and gain. Supply voltage is
applied to the RFOUT/VDD pin through an RF choke inductor.
Pin 4 (VIN) should be connected to RFOUT/VDD through an
external resistor to control the supply current. The RFIN and
RFOUT/VDD pins should be DC blocked to ensure proper
operation. Pin 5 (FEEDBACK) is connected through an RC network
to externally adjust the gain of the device without affecting the
noise figure (NF) of the LNA.
The SKY67103-396LF operates in the frequency range of 0.5 to
4.0 GHz with appropriate tuning. The SKY67103-396LF is an
improved higher frequency version of the SKY67102-396LF. The
SKY67103-396LF is pin-compatable with the SKY67100-396LF
and SKY67101-396LF series of low-noise devices.
The LNA is available in a compact, 2 x 2 mm, 8-pin 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.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
203115A1 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • June 26, 2014
1
DATA SHEET • SKY67103-396LF: HIGH LINEARITY, ACTIVE BIAS LNA
N/C
RFIN
RFGND
VIN
1
8
N/C
RFOUT/VDD
N/C
FEEDBACK
S1943
2
7
3
6
4
5
Figure 2. SKY67103-396LF Pinout – 8-Pin DFN
(Top View)
Table 1. SKY67103-396LF Signal Descriptions
Pin
1
2
3
4
Name
N/C
RFIN
RFGND
VIN
Description
No connection. May be connected to ground with no
change in performance.
RF input. DC blocking capacitor required.
RF ground. Connect to ground through a capacitor.
LNA supply current. Connect through series resistor
to VDD.
Pin
5
6
7
8
Name
FEEDBACK
N/C
RFOUT/VDD
N/C
Description
LNA external gain control. Connect to RFOUT using
a series RC network.
No connection. May be connected to ground with no
change in performance.
RF output. Apply VDD through RF choke inductor.
DC blocking capacitor required.
No connection. May be connected to ground with no
change in performance.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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June 26, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 203115A1
DATA SHEET • SKY67103-396LF: HIGH LINEARITY, ACTIVE BIAS LNA
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY67103-396LF are
provided in Table 2. Thermal performance data are provided in
Table 3.
Typical performance characteristics of the SKY67103-396LF for
broadband operation are illustrated in Figures 3 through 13.
Table 2. SKY67103-396LF Absolute Maximum Ratings (Note 1)
Parameter
Supply voltage
Quiescent supply current
RF input power
Storage temperature
Operating temperature
Electrostatic discharge:
Charged Device Model (CDM), Class 4
Human Body Model (HBM), Class 1A
Machine Model (MM), Class A
Note 1:
Performance is guaranteed only under the conditions listed in this table.
Electrical specifications for broadband operation are provided in
Table 4.
Electrical specifications for narrowband operation are provided in
Tables 5, 6, and 7. Table 8 provides data for noise parameters
versus frequency.
Symbol
V
dd
I
dq
P
in
Tstg
T
A
ESD
Minimum
Maximum
5.5
120
+21
Units
V
mA
dBm
C
C
–40
–40
+150
+105
1000
250
30
V
V
V
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. SKY67103-396LF: Thermal Performance Data (Note 1)
(V
DD
= 5 V, T
A
= +25
C,
P
IN
= –25 dBm, Characteristic Impedance [Z
O
] = 50
Ω,
Unless Otherwise Noted)
Parameter
Thermal resistance
Channel temperature @ +85 °C reference
(package heat slug)
Symbol
Θ
jc
V
DD
= 5 V, I
DQ
= 70 mA, no
RF applied, dissipated
power = 0.35 W
Test Condition
Min
Typical
45
Max
Units
°C/W
101
°C
Note 1:
Performance is guaranteed only under the conditions listed in this table.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
203115A1 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • June 26, 2014
3
DATA SHEET • SKY67103-396LF: HIGH LINEARITY, ACTIVE BIAS LNA
Table 4. SKY67103-396LF Electrical Specifications for Operation at 3.6 GHz (Note 1)
(V
DD
= 5.0 V, I
DD
= 78 mA, T
A
= +25
C,
P
IN
= –20 dBm, Characteristic Impedance [Z
O
] = 50
Ω,
Unless Otherwise Noted)
Parameter
RF Specifications
Noise figure (Note 2)
NF
@ 3.4 GHz
@ 3.6 GHz
@ 3.8 GHz
@ 3.4 GHz
@ 3.6 GHz
@ 3.8 GHz
@ 3.4 GHz
@ 3.6 GHz
@ 3.8 GHz
@ 3.4 GHz
@ 3.6 GHz
@ 3.8 GHz
@ 3.4 GHz
@ 3.6 GHz
@ 3.8 GHz
@ 3.6 GHz,
Δf
= 1 MHz,
P
IN
= –20 dBm/tone
@ 3.6 GHz,
Δf
= 1 MHz,
P
IN
= –20 dBm/tone
@ 3.6 GHz
@ 3.6 GHz
Up to 18 GHz,
–40 °C to +105 °C
15.3
15.0
14.6
0.65
0.70
0.76
16.8
16.5
16.1
14.5
17.5
16.0
18
17
17
27.0
26.4
27.0
+17.8
+34.3
+1.9
+17.4
>1
0.85
0.90
0.96
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
dBm
dBm
–
Symbol
Test Condition
Min
Typical
Max
Units
Small signal gain
|S
21
|
Input return loss
|S
11
|
Output return loss
|S
22
|
Reverse isolation
|S
12
|
3
rd
Order input intercept point
3
rd
Order output intercept point
1 dB input compression point
1 dB output compression point
Stability
DC Specifications
Supply voltage
Supply current
IIP3
OIP3
IP1dB
OP1dB
μ1, μ2
V
DD
I
DD
Set with external resistor
5.0
78
V
mA
Note 1:
Performance is guaranteed only under the conditions listed in this table.
Note 2:
Loss from the input SMA connector and Evaluation Board up to component C1 has been de-embedded from the NF measurement by 0.05 dB.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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June 26, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 203115A1
DATA SHEET • SKY67103-396LF: HIGH LINEARITY, ACTIVE BIAS LNA
Typical Performance Characteristics
(V
DD
= 77 mA, P
IN
= –20 dBm, Characteristic Impedance [Z
O
] = 50
Ω,
Unless Otherwise Noted)
0
S11
0
S11
+25 °C
–
40 °C
–5
+85 °C
–5
+105 °C
Return Loss (dB)
–10
Return Loss (dB)
+25 °C
–10
–15
–
40 °C
+85 °C
–15
Y1003
–20
Y1002
+105 °C
–25
0.0E+00
5.0E+09
1.0E+10
1.5E+10
2.0E+10
2.5E+10
–20
3.0E+09
3.2E+09
3.4E+09
3.6E+09
3.8E+09
4.0E+09
Frequency (Hz)
Figure 3. Broadband Input Return Loss
vs Frequency and Temperature
Frequency (Hz)
Figure 4. Narrowband Input Return Loss
vs Frequency and Temperature
+20.0
+10.0
0
S21
+25 °C
S21
19.0
18.5
18.0
17.5
+25 °C
–
40 °C
+85 °C
+105 °C
–
40 °C
+85 °C
+105 °C
Gain
(dB)
–10.0
–20.0
–30.0
–40.0
–50.0
0.0E+00
Y1004
Gain
(dB)
17.0
16.5
16.0
15.5
15.0
14.5
14.0
3.0E+09
3.2E+09
3.4E+09
3.6E+09
3.8E+09
Y1005
5.0E+09
1.0E+10
1.5E+10
2.0E+10
2.5E+10
4.0E+09
Frequency (Hz)
Frequency (Hz)
Figure 5. Broadband Gain vs Frequency and Temperature
Figure 6. Narrowband Gain vs Frequency and Temperature
S12
0
+25 °C
0
S12
+25 °C
–10.0
–20.0
–30.0
–40.0
–50.0
–60.0
–
40 °C
+85 °C
–5.0
–
40 °C
+85 °C
+105 °C
Reverse Isolation (dB)
Reverse Isolation (dB)
+105 °C
–10.0
–15.0
–20.0
–25.0
–30.0
Y1006
–70.0
0.0E+00
5.0E+09
1.0E+10
1.5E+10
2.0E+10
2.5E+10
–40.0
3.0E+09
3.2E+09
3.4E+09
3.6E+09
3.8E+09
4.0E+09
Frequency (Hz)
Frequency (Hz)
Figure 7. Broadband Reverse Isolation
vs Frequency and Temperature
Figure 8. Narrowband Reverse Isolation
vs Frequency and Temperature
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
203115A1 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • June 26, 2014
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Y1007
–35.0
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