DATA SHEET
SKY65174-21: 2.4 to 2.5 GHz WLAN Power Amplifier Module
Applications
IEEE 802.11 b/g/n WLAN systems
ISM band transmitters
Wireless access points, routers, gateways
Description
The SKY65174-21 is a highly integrated power amplifier module
(PAM) intended for high performance wireless local area network
(WLAN) requiring up to +27 dBm linear output power.
The SKY65174-21 is fabricated using Skyworks high reliability
Heterojunction Bipolar Transistor (HBT) InGaP process, which
allows for single supply operation while maintaining high
efficiency and good linearity.
The PAM is packaged in a 10-pin, 4 x 4 mm Multi-Chip Module
(MCM) together with power detector, biasing, and input/output
matching components. This architecture makes the SKY65174-21
a highly integrated solution requiring a minimum number of
external components.
A functional block diagram of the SKY65174-21 is shown in
Figure 1. The 10-pin MCM package and pinout are provided in
Figure 2. Signal pin assignments and functional pin descriptions
are provided in Table 1.
Features
PA linear output power: +27 dBm @ <2.5% EVM
High gain: 35 dB
Input/Output internally matched to 50
Ω
Internal, active bias circuits
MCM (10-pin, 4 x 4 mm) package
(MSL3, 260
C
per JEDEC J-STD-020)
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.
VREF1
VREF2
Active Bias
Detector
VDET
RF_IN
Input
Match
Inter-
Stage
Match
Inter-
Stage
Match
Output
Match
RF_OUT
VCC
Y2610
Figure 1. SKY65174-21 PAM Block Diagram
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201428F • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • November 19, 2015
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DATA SHEET • SKY65174-21: WLAN PAM
RF_IN
GND
VCC
GND
VDET
1
2
3
4
5
10
9
8
7
6
VREF2
VREF1
GND
GND
RF_OUT
S2019
Figure 2. SKY65174-21 Pinout
(Top View)
Table 1. SKY65174-21 Signal Descriptions
Pin
1
2
3
4
5
6
7
8
9
10
RF_IN
GND
VCC
GND
VDET
RF_OUT
GND
GND
VREF1
VREF2
Name
RF transmitter input
Ground
Supply voltage
Ground
Power detector output
RF transmitter output
Ground
Ground
Reference voltage 1
Reference voltage 2
Description
I/O
I
–
I
–
O
O
–
–
I
I
Signal Type
RF
–
Supply 5 V
–
Analog
RF
–
–
2.85 V
2.85 V
Technical Description
The SKY65174-21 meets the stringent WLAN spectral masks for
Orthogonal Frequency Division Multiplexing (OFDM) composite
signals. The high linearity of the PA enables an Error Vector
Magnitude (EVM) of less than 3% at output power levels of
+27 dBm.
The power detector achieves a dynamic range greater than 25 dB.
The PAM is stable up to an 6:1 voltage standing-wave ratio
(VSWR).
The SKY65174-21 PAM supports a battery voltage range of 3.3 V
up to 5.5 V.
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY65174-21 are provided
in Table 2. The recommended operating conditions are specified
in Table 3 and electrical specifications are provided in Tables 4
(V
CC
= 5 V) and 5 (V
CC
= 3.3 V).
Typical performance characteristics of the SKY65174-21 are
illustrated in Figures 3 to 8.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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November 19, 2015 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201428F
DATA SHEET • SKY65174-21 WLAN PAM
Table 2. SKY65174-21 Absolute Maximum Ratings (Note 1)
Parameter
RF output power (CW)
Supply voltage
Reference voltages (Note 2)
Total supply current
Power dissipation
Thermal resistance
Storage temperature
Operating temperature
Junction temperature
P
OUT
V
CC
VREF1, VREF2
I
CC
P
D
Θ
JC
T
STG
T
A
T
J
–55
–40
Symbol
Minimum
Maximum
+30
5.5
3.1
1000
2.9
28
+125
+85
+150
Units
dBm
V
V
mA
W
C/W
C
C
C
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.
Note 2:
Measured at the package pins.
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. SKY65174-21 Recommended Operating Conditions
Parameter
Operating frequency
Supply voltage (high voltage mode)
Supply voltage (low voltage mode)
RF output power
Reference voltages (Note 1)
Reference current 1
Reference current 2
Total supply current (CW signal)
Operating temperature
Note 1:
Measured at the package pins.
Symbol
f
V
CC
V
CC
P
OUT
VREF1, VREF2
I
REF
1
I
REF
2
I
CC
T
A
Minimum
2412
4.5
3.0
Typical
Maximum
2483
Units
MHz
V
V
dBm
5.0
3.3
+27
5.5
3.6
2.75
2.85
11
1
600
2.95
12
2
V
mA
mA
mA
C
–35
+25
+85
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201428F • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • November 19, 2015
3
DATA SHEET • SKY65174-21: WLAN PAM
Table 4. SKY65174-21 Electrical Specifications (Note 1)
(V
CC
= +5 V, VREF1 = VREF2 = 3.1 V, T
A
= +25
C,
f = 2.442 GHz, CW, Unless Otherwise Noted)
Parameter
Continuous Wave (CW) Input
Quiescent current
Operational current
1 dB output compression point
Noise figure
Small signal gain
Gain
variation
Input return loss
Detector voltage
2
nd
harmonic distortion
3
rd
harmonic distortion
PA enable time
IEEE 802.11g OFDM Input Signal, 64 QAM, 54 Mbps
Output power
P
OUT
EVM = 2.5%
EVM = 3.0%
–
+27
+27
–
dBm
dBm
I
CQ
I
CC
OP1dB
NF
|S
21
|
ΔS
21
|S
11
|
V
DET
2fo
3fo
802.11g, P
OUT
= +27 dBm
P
OUT
= +27 dBm
P
OUT
= +27 dBm
VREF1 toggled,
VREF2 = 2.85 V
200
P
IN
= –25 dBm,
f = 2.4 to 2.5
GHz
15
0.75
0.80
–50
–60
34.0
P
OUT
= +27 dBm
+31.0
275
700
+34.5
7
34.5
35.0
1
300
800
mA
mA
dBm
dB
dB
dB
dB
V
dBc
dBc
ns
Symbol
Test Condition
Min
Typical
Max
Units
Note 1:
Performance is guaranteed only under the conditions listed in this table.
Table 5. SKY65174-21 Electrical Specifications (Note 1)
(V
CC
= +3.3 V, VREF1 = VREF2 = 2.85 V, T
A
= +25
C,
f = 2.442 GHz, CW, Unless Otherwise Noted)
Parameter
Continuous Wave (CW) Input
Quiescent current
Operational current
1 dB output compression point
Small signal gain
I
CQ
I
CC
OP1dB
|S
21
|
P
OUT
= +24 dBm
230
520
+31
33
mA
mA
dBm
dB
Symbol
Test Condition
Min
Typical
Max
Units
IEEE 802.11g OFDM Input Signal, 64 QAM, 54 Mbps
Output power
P
OUT
EVM = 2.5%
+24
dBm
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
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November 19, 2015 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201428F
DATA SHEET • SKY65174-21 WLAN PAM
Typical Performance Characteristics
(V
CC
= +5 V, VREF1 = VREF2 = 3.1 V, T
A
= +25
C,
f = 2.442 GHz, Unless Otherwise Noted)
5.0
4.5
4.0
3.5
2.412 GHz
2.442 GHz
2.462 GHz
1800
1600
1400
Current
(mA)
EVM (%)
3.0
2.5
2.0
1.5
1.0
0.5
0
+3 +5 +7 +9 +11 +13 +15 +17 +19 +21 +23 +25 +27 +29 +31
1200
1000
800
600
400
200
+1
+5
+9
+13
+17
+21
+25
+29
+33
+37
Output Power (dBm)
Output Power (dBm)
Figure 3. EVM vs Output Power Over Frequency
(64 QAM, 54 Mbps, OFDM)
Figure 4. Current vs Output Power
(CW)
1800
1600
1400
+10
0
–10
802.11b
Current
(mA)
1200
1000
800
600
400
200
+1
+5
+9
+13
+17
+21
+25
+29
+33
Power (dBr)
–20
–30
–40
–50
–60
–70
–80
–0.06
–0.04
–0.02
P
OUT
= +30 dBm
0
+0.02
+0.04
+0.06
Output Power (dBm)
Frequency Offset (GHz)
Figure 5. Current vs Output Power
(CW, V
CC
= 3.3 V)
Figure 6. Spectral Mask
(11 Mbps)
+10
0
–10
+10
0
–10
802.11b
802.11b
Power (dBr)
Power (dBr)
–20
–30
–40
–50
–60
–70
–80
–0.06
–0.04
P
OUT
= +29 dBm
–20
–30
–40
–50
–60
–70
P
OUT
= +30 dBm
–0.02
0
+0.02
+0.04
+0.06
–80
–0.06
–0.04
–0.02
0
+0.02
+0.04
+0.06
Frequency Offset (GHz)
Frequency Offset (GHz)
Figure 7. Spectral Mask
(11 Mbps, V
CC
= 3.3 V)
Figure 8. Spectral Mask
(1 Mbps)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201428F • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • November 19, 2015
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