DATA SHEET
SKY65313-21: 900 MHz Transmit/Receive Front-End Module
Applications
Automated meter reading
Advanced metering infrastructure
ISM systems
Description
The Skyworks SKY65313-21 is a high-performance,
transmit/receive (T/R) front-end module (FEM). The device
provides a complete T/R chain with T/R switches.
The device transmit chain features +30.5 dBm output power and
a 40 percent power-added efficiency (PAE).
The device receive chain features a Low Noise Amplifier (LNA)
with a 1.4 dB noise figure (NF) and 16.6 dB gain. The cascaded
NF and gain, taking into account the 0.5 dB insertion loss
transmit/receive antenna switch, are 1.9 dB and 16.1 dB,
respectively, which makes the SKY65313-21 ideal for medium
power microwave links such as 900 MHz Industrial, Scientific and
Medical (ISM) band applications.
The module also has a shut-down mode and LNA bypass mode to
minimize power consumption.
The device is mounted in a 28-pin, 6 x 6 mm Multi-Chip Module
(MCM) Surface-Mounted Technology (SMT) package, which
allows for a highly manufacturable low-cost solution.
The device package and pinout are shown in Figure 1. A block
diagram of the SKY65313-21 is shown in Figure 2. Signal pin
assignments and functional pin descriptions are provided in
Table 1.
VCC_TX3
VCC_TX2
VCC_TX1
Features
Transmit output power > +30.5 dBm
High efficiency PA
Analog power control
Receive path NF <1.9 dB
LNA bypass mode
Integrated control logic
Internal RF match and bias circuits
All RF ports internally DC blocked
Shutdown mode
Small footprint, MCM (28-pin, 6 x 6 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.
GND
CTL1
CTL2
CTL3
VPC
GND
ANT
GND
VDD2
23
22
21
20
19
18
17
16
GND
GND
1
2
3
4
5
6
7
8
28
27
26
25
24
GND
GND
TX
GND
RX3
VCC_RX
VDD1
GND
S2126
9
10
11
12
13
14
15
GND
RX1
GND
GND
RX2
Figure 1. SKY65313-21 Pinout
(Top View)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202121B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • March 15, 2016
1
GND
DATA SHEET • SKY65313-21: T/R FRONT-END MODULE
Digital
Control
VPC
PA
Harmonic
Filter
Control
Logic
Matching
Network
Transmit
Antenna
Matching
Network
LNA
Matching
Network
RX3
RX1
RX2
S2124
Figure 2. SKY65313-21 Block Diagram
Table 1. SKY65313-21 Signal Descriptions
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Name
GND
CTL1
CTL2
CTL3
VPC
GND
ANT
GND
GND
RX1
GND
GND
RX2
GND
Ground
Transmit/receive mode digital control input
Shutdown mode digital control input
Receive bypass mode digital control input
Transmit output power analog control voltage input
Ground
Antenna switch common port. Internally matched to 50
Ω.
Ground
Ground
Receive arm of antenna switch. Internally matched to 50
Ω.
Ground
Ground
LNA and bypass switch input port
Ground
Description
Pin
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Name
GND
VDD1
VCC_RX
RX3
GND
TX
GND
GND
VDD2
VCC_TX1
VCC_TX2
VCC_TX3
GND
GND
Ground
3.3 V power supply
3.3 V power supply
LNA and bypass switch output port. Internally matched
to 50
Ω.
Ground
PA input port. Internally matched to 50
Ω.
Ground
Ground
4.0 V power supply
4.0 V power supply
4.0 V power supply
4.0 V power supply
Ground
Ground
Description
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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March 15, 2016 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 202121B
DATA SHEET • SKY65313-21: T/R FRONT-END MODULE
Technical Description
The SKY65313-21 consists of a complete T/R chain with T/R
switches contained in the module. A single-pole, double-throw
(SPDT) switch selects between the receive and transmit paths.
The module has a shut-down mode to minimize power
consumption.
Three digital input pins (CTL1, CTL2, and CTL3) are used to select
between transmit, receive, receive bypass, or shutdown mode.
Transmit Path
The transmit path contains a power amplifier (PA) optimized for
saturated performance. The PA output is internally matched for
optimum output power and efficiency into a 50
Ω
load
impedance. The PA output is passed through an harmonic filter
before being fed through the SPDT switch. The PA input provides
a good return loss into a 50
Ω
source impedance.
Transmit output power is controlled by the VPC pin, which is
normally set to 2.25 V DC voltage. The nominal DC input
impedance into the VPC pin is 50 kΩ.
Receive Path
The receive path contains an LNA with bypass switch. The LNA
impedance matching networks are internal to the module and
have been optimized for a low NF while maintaining good return
losses into a 50
Ω
source and load impedance. The receive arm
of the SPDT switch and the LNA input are connected to module
pins to allow an external filter to be inserted into the receive path.
Operation Mode Control
The four SKY65313-21 operating modes are controlled by the
three digital pins: CTL1, CTL2, and CTL3 (pins 2, 3, and 4,
respectively). The control logic truth table is provided in Table 2.
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY65313-21 are provided
in Table 3. Recommended operating conditions are specified in
Table 4. Electrical specifications are provided in Tables 5, 6,
and 7.
Typical performance characteristics of the SKY65313-21 are
illustrated in Figures 3 through 22.
Table 2. SKY65313-21 Operating Modes Truth Table
1
Control Voltage
Operating Mode
Transmit
Receive
Receive Bypass
Shutdown (Note 2)
CTL1
(Pin 2)
1
0
0
X
CTL2
(Pin 3)
1
1
1
0
CTL3
(Pin 4)
X
0
1
X
PA
On
Off
Off
Off
Internal States
LNA
Off
On
Off
Off
LNA Bypass
Switch
Open
Open
Through
Open
T/R Switch
Transmit
RX1
RX1
RX1
1 See Recommended Operating Conditions Table for logic 0 and 1 characteristics. “X” = don’t care state, defined as a valid state of logic 1 or 0.
2 In the high state, CTL1, CTL2, and CTL3 have an input current of 33
μA
due to an internal 100 kΩ pulldown. In the shutdown mode, for the lowest leakage current, the high state is not
recommended for CTL1 and CTL3.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202121B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • March 15, 2016
3
DATA SHEET • SKY65313-21 T/R FRONT-END MODULE
Table 3. SKY65313-21 Absolute Maximum Ratings
1
Parameter
LNA supply voltage
LNA supply current
PA supply voltage
PA supply current
Digital supply voltage
Digital supply voltage
Digital control voltage (CTL1, CTL2, CTL3)
Transmit output power control voltage (VPC)
Receive RF input power (RX2)
Receive RF input power (ANT)
Transmit RF input power
Operating case temperature
Storage temperature
Junction temperature
T/R port load VSWR in transmit mode
at or below their nominal value.
Nominal thermal resistance, junction to case, is 18 °C/W.
Symbol
VCC_RX
I
CC
1
VCC_TX1/2/3
I
CC
2
V
DD
1
V
DD
2
V
CTL
V
PC
P
IN
_
RX
2
P
IN
_
ANT
P
IN
_
TX
T
C
T
STG
T
J
VSWR
Minimum
–0.3
Maximum
+5.0
20
Units
V
mA
V
A
V
V
V
V
dBm
dBm
dBm
°C
°C
°C
–
–0.3
+5.0
1.6
–0.5
–0.5
–0.5
–0.3
+5.5
+5.5
V
DD
1
+ 0.3
+5.0
+5
+33
+15
–40
–55
+85
+150
+150
10:1
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
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 4. SKY65313-21 Recommended Operating Conditions
Parameter
Frequency range
LNA supply voltage
Digital supply voltage
1
PA supply voltage
Digital supply voltage
1
Digital input voltage, logic 0 (CTL1, CTL2, CTL3)
Digital input voltage, logic 1 (CTL1, CTL2, CTL3)
Transmit output power control voltage (VPC)
Receive RF input power (RX2)
Transmit RF input power (TX)
Transmit duty cycle
1 V
DD
1 and V
DD
2 are diode-coupled together with a typical turn-on voltage of 3.2 V.
Symbol
f
VCC_RX
V
DD
1
VCC_TX1/2/3
V
DD
2
V
CTL
V
CTL
V
PC
P
IN
_
RX
2
P
IN
_
TXIN
Minimum
860
3.0
Typical
Maximum
960
Units
MHz
V
V
3.3
VCC_RX
3.6
3.0
4.0
V
CC_TX1/2/3
4.4
V
V
0
1.6
0
2.25
0.7
V
DD
1
2.50
–15
+10
+13
50
V
V
V
dBm
dBm
%
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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March 15, 2016 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 202121B
DATA SHEET • SKY65313-21: T/R FRONT-END MODULE
Table 5. SKY65313-21 DC Electrical Specifications
1
(VCC_RX = VDD1 = 3.0 V to 3.6 V, VCC_TX1/2/3 = VDD2 = 3.6 V to 4.4 V, T
C
= –40
C
to +85
C,
No RF Input Power, Unless Otherwise
Noted)
Parameter
Quiescent current, receive mode
2
Quiescent current, receive bypass mode
2
VDD1 quiescent current, transmit mode
VCC_TX1/2/3/quiescent current, transmit
mode
VCC_TX1/2/3/ operating current, transmit
mode
V
CC
_
RX
quiescent current, shudown mode
2, 3
VCC_TX1/2/3 quiescent current, shutdown
mode
2, 3
Digital input current, logic
3
Digital input current, logic 0
3
2 Total module power supply current.
3Not production tested.
Symbol
I
Q
_
RX
I
Q
_
BYP
I
Q
_
VDD
1
I
Q
_
TXIN
Test Condition
Min
7.5
Typical
12.6
46
25
Max
20.0
90
30
88
Units
mA
μA
mA
mA
T
C
= 25 °C,
VCC_TX1/2/3 = 4 V,
V
PC
= 2.25 V
P
IN
= +10 dBm, @ 902 to
928 MHz, V
PC
= 2.25 V
55
I
OP
_
TXIN
I
Q
_
SDVCC
_
RX
I
Q
_
SDVCC
_
TX
1
,
I
Q
_
SDVCC
_
TX
2
,
I
Q
_
SDVCC
_
TX
3
I
H
I
L
655
0.01
0.03
826
mA
μA
μA
33
0
μA
μA
1 Performance is guaranteed only under the conditions listed in this table.
Table 6. SKY65313-21 Electrical Specifications: Receive and Receive Bypass Mode (1 of 2)
1
(VCC_RX = VDD1 = 3.0 V to 3.6 V, VCC_TX1/2/3 = VDD2 = 3.6 V to 4.4 V, T
C
= –40
C
to +85
C,
f = 902 to 928 MHz, 50
Ω
Source and
Load Impedance, CW Input, Unless Otherwise Noted)
Parameter
Receive Mode: RX2 to Receive Output Path
Small signal gain
Noise figure
Noise figure variation over temperature
1 dB input compression point
Third order input intercept point
Input return loss
Output return loss
Reverse isolation
Non-harmonic spurious
2, 3
Transition time
2
G
LNA
NF
LNA
NF
TEMP
IP1dB
LNA
IIP3
LNA
|S
11
|
LNA
|S
22
|
LNA
|S
12
|
LNA
P
SPUR
_
LNA
T
LNA
VSWR 10:1, all phases
0.5
1 dB gain compression
P
IN
= –30 dBm/tone,
200 kHz spacing
–13
–3.5
8.0
10.0
20
T
C
= 25 °C, V
CC
_
RX
= 3.3 V
15.6
16.6
1.4
±0.25
–11
0
10.7
13.6
22
–50
18.3
1.8
dB
dB
dB
dBm
dBm
dB
dB
dB
dBm
μs
Symbol
Test Condition
Min
Typical
Max
Units
Receive Bypass Mode: RX2 to Receive Output Path
Insertion loss
1 dB input compression point
Third order input intercept point
Input return loss
L
BYP
IP1dB
BYP
IIP3
BYP
|S
11
|
BYP
1 dB gain compression
P
IN
= –30 dBm/tone,
200 kHz spacing
+15
+27
12
3
+16
+30
15
4
dB
dBm
dBm
dB
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202121B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • March 15, 2016
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