1
Skyworks Solutions, Inc. Phone [781] 376-3000 Fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com
200082 Rev. B Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. January 7, 2005
Applications
WLAN 802.11a, b, g diversity
Features
Operating frequency DC6 GHz
Positive low voltage control (0/+3 V operation)
Low insertion loss
PHEMT process
Available lead (Pb)-free MSL-1 @ 250 C per JEDEC J-STD-020
Description
The AS218-321 is a broadband transfer switch designed to
combine T/R and antenna diversity switching functions on a
single IC. The device is designed to handle high power and
maintain high linearity at low control voltages. This low cost
switch is ideal for Wi-Fi systems and is capable of covering
both the 2.4 and 5 GHz bands.
AS218-321, AS218-321LF: PHEMT GaAs IC High Power
Transfer Switch DC6 GHz
DATA SHEET
QFN-12
0.008 (0.20 mm)
Seating Plane
0.118 (3.00 mm)
Pin 1 Indicator
Pin 1
Indicator
0.118
(3.00 mm)
0.001
(0.02 mm)
0.030
(0.75 mm)
0.002
(0.05 mm)
Exposed pad
0.029
(0.73 mm)
0.017
(0.435 mm) Sq.
0.007
(0.180 mm)
0.0196
(0.50 mm) BSC
0.057 (1.45 mm) Sq.
+ 0.004 (0.10 mm)
- 0.006 (0.15 mm)
0.022 (0.55 mm)
0.004 (0.10 mm)
0.009 (0.23 mm)
+ 0.003 (0.07 mm)
- 0.002 (0.05 mm)
Skyworks offers lead (Pb)-free "environmentally
friendly" packaging that is RoHS compliant
(European Parliament for the Restriction of
Hazardous Substances).
NEW
Parameter
(1, 4)
Condition
Frequency
Min.
Typ.
Max.
Unit
Insertion loss
(2)
Ant 1, Ant 2 to TX, RX
0.106.00 GHz
1.6
1.8
dB
2.402.50 GHz
1.2
1.4
dB
5.155.85 GHz
1.4
1.6
dB
Isolation
Ant 1, Ant 2 to TX, RX
0.106.00 GHz
17
19
dB
2.402.50 GHz
26
28
dB
5.155.85 GHz
17
19
dB
Isolation
V
1
= V
2
0.106.00 GHz
6
dB
Return loss
(3)
Ant 1, Ant 2 to TX, RX
0.106.00 GHz
10
dB
2.402.50 GHz
15
dB
5.155.85 GHz
20
dB
Electrical Specifications at 25 C (0, +3 V)
1. All measurements made in a 50
system.
2. Insertion loss changes by 0.003 dB/C.
3. Return loss for insertion loss state.
4. TX and RX paths can be used interchangeably.
Typical Performance Data (0, +3 V)
Insertion Loss (dB)
Frequency (GHz)
Insertion Loss vs. Frequency
-2.0
-1.8
-1.6
-1.4
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0
0.6
1.2
1.8
2.4
3.0
3.6
4.2
4.8
5.4
6.0
A1-R
X
Path
A1-T
X
Path
A2-R
X
Path
A2-T
X
Path
Isolation (dB)
Frequency (GHz)
Isolation vs. Frequency
-40
-35
-30
-25
-20
-15
-10
-5
0
0.6
1.2
1.8
2.4
3.0 3.6
4.2
4.8
5.4
6.0
A1-R
X
Path
A1-T
X
Path
A2-R
X
Path
A2-T
X
Path
A1-A2
T
X
-R
X
Return Loss (dB)
Frequency (GHz)
Return Loss vs. Frequency
-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
0.6
1.2
1.8
2.4
3.0
3.6
4.2
4.8
5.4
6.0
A1-R
X
Path
A1-T
X
Path
A2-R
X
Path
A2-T
X
Path
Characteristic
Value
RF input power
+35 dBm > 500 MHz
0/+7 V control
Control voltage
-0.2 V, +8 V
Operating temperature
-40 C to +85 C
Storage temperature
-65 C to +150 C
JC
25 C/W
Absolute Maximum Ratings
Skyworks Solutions, Inc. Phone [781] 376-3000 Fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com
January 7, 2005 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. 200082 Rev. B
DATA SHEET AS218-321, AS218-321LF
2
Parameter
Condition
Frequency
Min.
Typ.
Max.
Unit
2nd and 3rd harmonic
23 dBm input @ 0,+3 V
26 GHz
63
dBc
P
1 dB
26 GHz
33
dBm
IIP3
20 dBm per tone
23 GHz
54
dBm
22 dBm per tone
56 GHz
47
dBm
Control voltages
V
LOW
= 00.2 V @ 20 A max.
V
HIGH
= 35 V @ 200 A max.
Operating Characteristics at 25 C (0, +3 V)
Performance is guaranteed only under the conditions listed in the specifications table and is
not guaranteed under the full range(s) described by the Absolute Maximum specifications.
Exceeding any of the absolute maximum/minimum specifications may result in permanent
damage to the device and will void the warranty.
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 poten-
tials of several kilovolts on the human body or
equipment, which can discharge without detection.
Industry-standard ESD precautions must be employed
at all times.
DATA SHEET AS218-321, AS218-321LF
Skyworks Solutions, Inc. Phone [781] 376-3000 Fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com
200082 Rev. B Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. January 7, 2005
3
Pin Out (Top View)
GND
GND
V
1
GND
GND
V
2
T
X
GND
R
X
Ant 1
GND
Ant 2
123
4
5
6
12
11
10
987
C
BL
C
BL
C
BL
C
BL
DC blocking capacitors (C
BL
) required on RF ports.
C
BL
= 15 pF.
"1" = +3 to +5 V.
"0" = 0 to +0.2 V.
V
1
V
2
Insertion Loss Path
0
1
Ant 1 to TX, Ant 2 to RX
1
0
Ant 2 to TX, Ant 1 to RX
0
0
Allowed but not recommended
1
1
Allowed but not recommended
Truth Table
Skyworks Solutions, Inc. Phone [781] 376-3000 Fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com
January 7, 2005 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. 200082 Rev. B
DATA SHEET AS218-321, AS218-321LF
4
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Information in this document is provided in connection with Skyworks Solutions, Inc. ("Skyworks") products. These materials are provided by Skyworks as a service to its customers and may be
used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials. Skyworks may make changes to its documentation, products,
specifications and product descriptions at any time, without notice. Skyworks makes no commitment to update the information and shall have no responsibility whatsoever for conflicts,
incompatibilities, or other difficulties arising from future changes to its documentation, products, specifications and product descriptions.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by or under this document. Except as may be provided in Skyworks Terms and Conditions of
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THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED OR OTHERWISE, RELATING TO SALE AND/OR USE OF SKYWORKS PRODUCTS INCLUDING
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The following are trademarks of Skyworks Solutions, Inc.: SkyworksTM, the Skyworks logo, and Breakthrough SimplicityTM. Product names or services listed in this publication are for identification
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