202959I • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 13, 2015
1
DATA SHEET • SKY85608-11: WLAN SWITCH/LNA FEM
Table 1. SKY85608-11 Signal Descriptions
Pin
1
2
3
4
ANT
CRX
RX
LEN
Name
Antenna port
Control signal
LNA output
Control signal
Description
Pin
5
6
7
8
VDD
CTX
GND
TX
Name
Supply voltage
Control signal
Ground
Transmit input
Description
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY85608-11 are provided
in Table 2. The recommended operating conditions are specified
in Table 3, and electrical specifications are provided in Tables 4,
5, and 6.
The state of the SKY85608-11 is determined by the logic provided
in Table 7.
Table 2. SKY85608-11 Absolute Maximum Ratings (Note 1)
Parameter
Supply voltage
DC input on control pins
LNA input power (RXOUT terminated in 50
Ω
match)
Operating temperature
Storage temperature
Symbol
V
BAT
, V
CC
V
IN
P
I
N
T
A
T
STG
Minimum
–0.3
–0.3
+5
–40
–40
+85
+140
Maximum
+5.5
+3.6
Units
V
V
dBm
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.
202959I • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 13, 2015
3
DATA SHEET • SKY85608-11: WLAN SWITCH/LNA FEM
Table 7. SKY85608-11 Control Logic (Note 1)
Mode
All off
WLAN receive
WLAN receive bypass
WLAN transmit
Regulator
Output
Off
Off
Off
On
CRX
(Pin 2)
0
1
1
0
LEN
(Pin 4)
0
1
0
0
CTX
(Pin 6)
0
0
0
1
Note 1:
“0” = 0 V to +0.4 V. “1” = +1.6 V to +3.6 V. Any state other than described in this table places the switch into an undefined state. An undefined state will not damage the device.
Evaluation Board Description
The SKY85608-11 Evaluation Board is used to test the
performance of the SKY85608-11 LNA FEM. An Evaluation Board
schematic diagram is provided in Figure 3. A photograph of the
Evaluation Board is shown in Figure 4.
Evaluation Board Setup Procedure
1. Connect the system ground to pin 2 of connector J4.
2. Apply 3.3 V to VDD pin 6 or 12 of connector J4.
3. Refer to the Control Logic Table in Table 7 to set the device in
the desired mode of operation. Set CRX, CTX, and LEN to
appropriate VIL and VIH voltages, as specified in Table 3.
4. Transmit performance is monitored by applying an RF signal to
the connector J1 (TX) and measuring the output power at the
antenna port connector J2 (ANT).
5. Monitor performance in either high gain or bypass mode by
applying an RF signal to the antenna port connector J2 (ANT)
and measuring the output power at the receive port connector
J3 (RX).
Evaluation Board Losses
The total track losses from the RF connectors of the Evaluation
Board to the pins of the SKY85608 device are:
ANT: 0.25 dB
TX: 0.25 dB
RX: 0.25 dB
Package Dimensions
The PCB layout footprint for the SKY85608-11 is provided in
Figure 5. A typical part marking is shown in Figure 6. Package
dimensions for the 8-pin DFN are shown in Figure 7, and tape and
reel dimensions are provided in Figure 8.
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 SKY85608-11 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
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