Alpha Industries, Inc. [978] 241-7000
Fax [978] 241-7906 Email sales@alphaind.com www.alphaind.com
1
Specifications subject to change without notice. 1/02A
GaAs IC Reflective SPDT DC6 GHz
Features
Single Broadband Design Covers
802.11a, 802.11b and 3.5 GHz Fixed
Wireless Applications
Positive Voltage Control (0, +5 V)
Low Insertion Loss Thru 6 GHz
High Linearity
QFN-12 3 x 3 mm Package
Low Cost
AS209-321
Description
The AS209-321 is a GaAs PHEMT reflective SPDT
switch that has been designed for WLAN T
X
/R
X
applications. This device has been optimized to provide
excellent performance from DC6 GHz. The AS209-321's
high frequency, low loss and high linearity make it an
ideal choice for 802.11a, 802.11b and 3.5 GHz fixed
wireless LAN applications.
Parameter
Frequency
Min.
Typ.
Max.
Unit
Insertion Loss
DC2 GHz
0.7
1.0
dB
DC3 GHz
0.8
1.2
dB
DC4 GHz
1.1
1.4
dB
DC6 GHz
1.2
1.5
dB
Isolation
DC2 GHz
30
34
dB
DC3 GHz
28
32
dB
DC4 GHz
25
29
dB
DC6 GHz
20
24
dB
Return Loss (On State)
DC2 GHz
15
18
dB
DC3 GHz
12
15
dB
DC4 GHz
10
13
dB
DC6 GHz
10
13
dB
Electrical Specifications at 25C (0, +5 V)
Preliminary
Parameter
Condition
Frequency
Min.
Typ.
Max.
Unit
Switching Characteristics
Rise, Fall (10/90% or 90/10% RF)
30
ns
On, Off (50% CTL to 90/10% RF)
50
ns
Video Feedthru
25
mV
Input Intermodulation Intercept Point (IIP3)
0/+5 V
14 GHz
46
dBm
Control Voltages
V
C1
or V
C2
= "0"
0
0.5
V
V
C1
or V
C2
= "1" with @ 200
A Max.
3.5
5.0
V
Operating Characteristics at 25C (0, +5 V)
Characteristic
Value
RF Input Power
1 W Max. > 500 MHz
Control Voltage
-0.2 V, +6 V
Operating Temperature
-40C to +85C
Storage Temperature
-65C to +150C
Absolute Maximum Ratings
GaAs IC Reflective SPDT DC6 GHz
AS209-321
2
Alpha Industries, Inc. [978] 241-7000
Fax [978] 241-7906 Email sales@alphaind.com www.alphaind.com
Specifications subject to change without notice. 1/02A
V
C2
J
2
N/C
N/C
N/C
N/C
J
1
VC
1
N/C
N/C
J
3
N/C
C
BL
C
BL
C
BL
Pin Out
Typical Performance Data (0, +5 V, C
BL
= 47 pF)
Insertion Loss vs. Frequency
Frequency (GHz)
Insertion Loss (dB)
0
1
2
3
4
6
5
7
-2.50
-2.25
-2.00
-1.75
-1.50
-1.25
-1.00
-0.75
-0.50
-0.25
0
Isolation vs. Frequency
Frequency (GHz)
Isolation (dB)
0
1
2
3
4
6
5
7
-50
-40
-30
-20
-10
0
J
2
Return Loss vs. Frequency
Frequency (GHz)
Return Loss (dB)
0
1
2
3
4
6
5
7
-20
-15
-10
-5
0
J
1
J
2
Input IP3 vs. Frequency
Frequency (GHz)
Input IP3 (dBm)
45
46
47
48
49
50
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8 3.9
V
C1
V
C2
J
1
J
2
J
1
J
3
0
1
Insertion Loss
Isolation
1
0
Isolation
Insertion Loss
Truth Table
DC blocks required. C
BL
= 47 pF for operation >500 MHz.
GaAs IC Reflective SPDT DC6 GHz
AS209-321
Alpha Industries, Inc. [978] 241-7000
Fax [978] 241-7906 Email sales@alphaind.com www.alphaind.com
3
Specifications subject to change without notice. 1/02A
SK39507
Rev 2
SPDT
J2
V
C2
J
1
V
C1
J
3
Board material: 10 mil FR4.
Ground
Via (Typical)
1.250
0.738
0.018
Evaluation Board Layout
Typical S-Parameters (Control Voltage 0/+5 V)
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)
0.0196
(0.50 mm) BSC
0.057 (1.45 mm) SQ.
+ 0.004 (0.10 mm)
- 0.006 (0.15 mm)
0.009 (0.23 mm)
+ 0.003 (0.07 mm)
- 0.002 (0.05 mm)
Insertion Loss State
Isolation State
# GHZ S DB R 50
# GHZ S DB R 50
Freq.
(GHz)
S
11
S
11a
S
21
S
21a
S
12
S
12a
S
22
S
22a
S
11
S
11a
S
21
S
21a
S
12
S
12a
S
22
S
22a
0.50
-5.5
-90.1
-1.63
-2.6
-1.63
-1.9
-5.6
-122.6
-0.8
-98.7
-38.4
6.6
-39.5
10.0
-5.5
-122.4
0.95
-11.1
-136.0
-0.72
-51.1
-0.72
-50.0
-11.1
163.9
-1.6
-170.6
-36.3
-16.4
-35.8
-15.8
-11.0
162.9
1.50
-16.9
-177.2
-0.63
-98.3
-0.63
-98.6
-16.6
81.8
-2.2
120.6
-34.6
-45.2
-34.9
-46.3
-16.9
78.9
1.90
-19.7
165.5
-0.68
-130.2
-0.68
-130.6
-19.9
15.9
-2.3
78.5
-33.3
-67.2
-34.1
-68.1
-20.6
15.0
2.40
-18.3
128.3
-0.75
-170.0
-0.75
-168.5
-19.0
-67.9
-2.3
31.9
-32.1
-94.8
-31.4
-90.3
-19.8
-67.6
2.95
-15.7
68.2
-0.84
147.6
-0.84
148.2
-15.4
-141.6
-2.3
-14.9
-31.1
-127.6
-31.5
-126.0
-15.6
-140.3
3.55
-14.7
0.0
-0.99
104.4
-0.99
103.5
-13.1
147.3
-2.3
-63.1
-29.6
-160.3
-30.8
-159.6
-14.0
153.8
4.05
-13.9
-49.6
-1.04
67.4
-1.04
66.8
-12.8
96.4
-2.3
-101.6
-28.8
175.2
-29.3
172.7
-12.3
100.0
4.40
-14.2
-85.7
-1.07
41.4
-1.07
41.4
-13.1
57.7
-2.4
-128.0
-27.4
153.3
-28.0
155.5
-12.6
58.5
4.90
-16.9
-124.1
-1.14
4.1
-1.14
4.0
-15.9
-14.0
-2.4
-165.4
-25.9
122.8
-26.5
122.9
-15.7
-9.1
5.40
-17.2
-129.9
-1.13
-34.6
-1.13
-34.6
-17.7
-119.1
-2.5
158.1
-24.9
89.9
-25.8
89.6
-16.7
-111.6
6.00
-12.0
-165.9
-1.21
-82.2
-1.21
-81.2
-12.3
133.0
-2.6
114.2
-23.2
47.8
-23.9
47.4
-11.7
135.5
6.45
-10.0
153.5
-1.45
-116.4
-1.45
-115.5
-9.5
75.7
-2.7
80.8
-22.3
16.1
-23.7
23.1
-9.0
75.7
7.00
-9.5
103.6
-2.00
-156.8
-2.00
-158.9
-8.2
11.5
-2.8
39.3
-21.2
-23.8
-23.7
-23.4
-8.0
10.6
Measured S-parameters include the evaluation board.
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