DATA SHEET
SKY65344-21: 2.4 GHz Transmit/Receive Front-End Module
with Integrated Low-Noise Amplifier
Applications
•
2.4 GHz ISM band radios
•
ZigBee
®
FEMs
•
IEEE 802.15.4 applications
Description
Skyworks SKY65344-21 is a high-efficiency Front-End Module
(FEM) for ZigBee and other 2.4 GHz ISM band applications. The
small, 6 x 6 mm Multi-Chip Module (MCM) contains a 2400 to
2500 MHz high-efficiency transmit path and a low-loss
bidirectional path. The bidirectional path can be used to directly
connect the antenna port to a directional RF port.
The transmit path consists of an harmonic filter and high
efficiency Power Amplifier (PA) capable of providing +20 dBm of
power at the antenna port. Also included is an internal balun to
allow use of differential input signals.
The receive path contains a high isolation transmit/receive (T/R)
switch, Low-Noise Amplifier (LNA), and balun for low-noise
differential output.
The device is mounted in a 20-pin, 6 x 6 mm MCM Surface-
Mounted Technology (SMT) package, which allows for a highly
manufacturable low-cost solution.
A block diagram of the SKY65344-21 is shown in Figure 1. The
device package and pinout for the 20-pin MCM are shown in
Figure 2.
Features
•
Transmit output power > +20 dBm
•
Receive path NF < 2.2 dB
•
High efficiency PA
•
Programmable transmit power levels
•
Configurable transmit/bidirectional paths
•
Internal switching and control circuits
•
Internal RF match and bias circuits
•
Single DC supply = 3.3 V
•
Interfaces seamlessly with Ember EM250, EM260, and EM35x
ZigBee transceivers
•
All RF ports are internally DC blocked
•
Small footprint, MCM (20-pin, 6 x 6 mm) SMT package (MSL3,
260
°C
per JEDEC J-STD-020)
Figure 1. SKY65344-21 Block Diagram
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201181F • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • May 2, 2011
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DATA SHEET • SKY65344-21 TRANSMIT/RECEIVE FRONT-END MODULE WITH LNA
Figure 2. SKY65344-21 Pinout – 20-Pin MCM
(Top View)
Technical Description
Shut Down and T/R Switch Mode Control
Pin 8 (SDN) is used to enable the device while pin 20 (T_R)
enables transmit or receive mode. The following control logic is
used to configure the transmit, receive, or shut down mode of the
SKY65344-21:
SDN
(Pin 8)
High
High
Low
T_R
(Pin 20)
High
Low
Low
Mode
Transmit mode
Receive mode
Shut Down mode
thermal vias under the ground paddles for optimum thermal
performance. The Evaluation Board layout can be used as a guide
for RF ground and thermal layout.
Electrical and Mechanical Specifications
Signal pin assignments and functional pin descriptions are
described in Table 1. The absolute maximum ratings of the
SKY65344-21 are provided in Table 2. The recommended
operating conditions are specified in Table 3 and electrical
specifications are provided in Table 4.
Typical performance characteristics of the SKY65344-21 are
shown in Figures 3, 4, and 5.
Bottom Center Paddle
The bottom center paddles must be electrically grounded for
proper RF performance. Customers should place adequate
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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May 2, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201181F
DATA SHEET • SKY65344-21 TRANSMIT/RECEIVE FRONT-END MODULE WITH LNA
Table 1. SKY65344-21 Signal Descriptions
Pin #
1
2
3
4
5
6
7
8
9
10
Note:
Name
BIAS1
TX_P
TX_N
BIAS2
RX_P
RX_N
GND
SDN
RX_VCC
GND
Description
Transmit port bypass voltage
Positive transmit input port
Negative transmit input port
Receive port bypass voltage
Positive receive output port
Negative receive output port
Ground
Shut down enable
Receive DC supply, +3.3 V
Ground
Pin #
11
12
13
14
15
16
17
18
19
20
GND
GND
ANT
GND
GND
GND
Name
Ground
Ground
Antenna port
Ground
Ground
Ground
Description
TX_VCC
GND
N/C
T_R
Transmit DC supply, +3.3 V
Ground
No connection
Transmit/receive control
The bottom ground pad
must be
connected to RF ground.
Table 2. SKY65344-21 Absolute Maximum Ratings (Note 1)
Parameter
Supply voltage
Control voltage
Bypass voltage
RF input power, antenna port
RF input power, transmit port
Case operating temperature
Storage temperature
Junction temperature
Symbol
RX_VCC, TX_VCC
SDN, T_R
BIAS1, BIAS2
P
IN
_
ANT
P
IN
_
TX
T
C
T
ST
T
J
–40
–55
Minimum
1.8
Maximum
4
3.6
4
+10
+8
+85
+125
+150
Units
V
V
V
dBm
dBm
°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.
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. SKY65344-21 Recommended Operating Conditions
Parameter
Frequency range
Supply voltage (TX_VCC, RX_VCC)
Shut down and T/R control voltage:
Low
High
f
VCC
T_R
L
, SDN
L
T_R
H
, SDN
H
Symbol
Minimum
2400
2.7
3.3
0
1.80
Typical
Maximum
2500
3.6
0.1
3.60
Units
MHz
V
V
V
1.62
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201181F • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • May 2, 2011
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DATA SHEET • SKY65344-21 TRANSMIT/RECEIVE FRONT-END MODULE WITH LNA
Table 4. SKY65344-21 Electrical Specifications (Note 1)
(Vcc = 3.3 V, T
C
= 25
°C,
P
IN
= +3 dBm, Unless Otherwise Noted)
Parameter
Frequency range
Return loss (Note 2)
Transmit differential port (TX_P, TX_N)
impedance (Note 2)
Receive differential port (RX_P, RX_N)
impedance (Note 2)
Transmitter Section
Input power range
Maximum output power (Note 2)
Transmit output power
Operating current
2
nd
harmonic
3
rd
harmonic
Small signal gain (Note 2)
Spur (Note 2)
Ruggedness (Note 2)
Receive Section
Small signal gain
Noise Figure
1 dB Input Compression Point (Note 2)
3
rd
Order Input Intercept Point (Note 2)
G
NF
IP1dB
IIP3
CW
Two CW tones, spaced
1 MHz apart
@ P
IN
= –9 dBm
CW
No RF input, VCC = 3.3 V,
SDN = 0 V, T_R = 0 V
CW
7
10
2.2
–11
–1
3.0
dB
dB
dBm
dBm
P
IN
P
SAT
P
OUT
I
OP
_
H
Pn2
Pn3
G
H
IEEE 802.15.4 OQPSK
modulated
IEEE 802.15.4 OQPSK
modulated
P
IN
= –10 dBm
VSWR up to 10:1 (all
phase angles)
VSWR up to 10:1 (all
phase angles)
+19.5
+3
+21.5
+20.0
105
–48
–49
20
No parasitic oscillation > –44 dBm
No module damage or permanent degradation
130
–43
–43
dBm
dBm
dBm
mA
dBm
dBm
dB
–
–
f
RL
Z
DTX
Z
DRX
All RF ports
Symbol
Test Condition
Min
2400
10
29 + j75
68 + j38
Typical
Max
2500
Units
MHz
dB
Ω
Ω
Operating current
Leakage current
I
CC
I
LEAK
7
4
10
10
mA
μA
Note 1:
Performance is guaranteed only under the conditions listed in this Table.
Note 2:
Parameter is characterized under the conditions in this Table but is not production tested.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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May 2, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201181F
DATA SHEET • SKY65344-21 TRANSMIT/RECEIVE FRONT-END MODULE WITH LNA
Typical Performance Characteristics
(V
CC
= 3.3 V, T
C
= 25 °C, P
IN
= +3 dBm, Unless Otherwise Noted)
Figure 3. Output Power vs Input Power
@ 2445 MHz
Figure 4. Output Power vs Input Power Over Temperature
@ 2445 MHz
Figure 5. Output Power vs Supply Voltage
@ 2445 MHz
Evaluation Board Description
The SKY65344-21 standalone Evaluation Board is used to test the
performance of the SKY65344-21 FEM. The Evaluation Board
schematic diagram is shown in Figure 6. An assembly drawing for
the Evaluation Board is shown in Figure 7.
A reference design Evaluation Board is also available to test the
SKY65344-21 with an Ember EM35x series transceiver (see
Ordering Information on the last page of this Data Sheet).
Package and Handling Information
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.
The SKY65344-21 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 Skyworks Application Note,
PCB
Design and SMT Assembly/Rework Guidelines for MCM-L
Packages,
document number 101752.
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
The phone board layout footprint for the SKY65344-21 is shown in
Figure 8. Package dimensions for the 20-pin MCM are shown in
Figure 9, and tape and reel dimensions are provided in Figure 10.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201181F • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • May 2, 2011
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