Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
1
Specifications subject to change without notice. 8/00A
PHEMT GaAs IC SPDT Switch DC3 GHz
Features
s
P
1 dB
+30 dBm Typical @ +3 V
s
IP3 43 dBm Typical @ +3 V
s
Low Insertion Loss (0.3 dB @ 0.9 GHz)
s
Low DC Power Consumption
s
Ultra Miniature SC-70 6 Lead Package
s
PHEMT Process
AS179-92
Description
The AS179-92 is an IC FET SPDT switch in a low cost
miniature SC-70 6 lead plastic package. The AS179-92
features low insertion loss and positive voltage operation
with very low DC power consumption. This general
purpose switch can be used in a variety of
telecommunications applications.
Parameter
1
Frequency
2
Min.
Typ.
Max.
Unit
Insertion Loss
3
DC1.0 GHz
0.3
0.4
dB
DC3.0 GHz
0.4
0.6
dB
Isolation
DC1.0 GHz
22
25
dB
DC2.0 GHz
22
25
dB
DC3.0 GHz
20
23
dB
VSWR
4
DC1.0 GHz
1.2:1
1.4:1
DC2.0 GHz
1.2:1
1.4:1
DC3.0 GHz
1.3:1
1.4:1
Electrical Specifications at 25C (0, +3 V)
0.079 (2.00 mm)
0.008 (0.20 mm)
0.049 (1.25 mm)
0.004 (0.10 mm)
0.008 (0.20 mm)
0.004 (0.10 mm)
0.087 (2.20 mm)
0.008 (0.20 mm)
0.035 (0.90 mm)
0.004 (0.10 mm)
0.002 (0.005 mm)
0.002 (0.005 mm) 0.037 (0.95 mm)
0.006 (0.15 mm)
0.010 (0.25 mm)
0.006 (0.15 mm)
0.0055
(0.14 mm)
0.0015
(0.04 mm)
0.0256 (0.65 mm)
BSC
0.009 (0.23 mm)
REF
PIN 1 INDICATOR
SC-70 6 Lead
Parameter
Condition
Frequency
Min.
Typ.
Max.
Unit
Switching Characteristics
5
Rise, Fall (10/90% or 90/10% RF)
10
ns
On, Off (50% CTL to 90/10% RF)
20
ns
Video Feedthru
25
mV
Input Power for 1 dB Compression
0/+3 V
0.53.0 GHz
+30
dBm
0/+5 V
0.53.0 GHz
+34
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +5 dBm
0/+3 V
0.53.0 GHz
+43
dBm
0/+5 V
0.53.0 GHz
+50
dBm
Control Voltages
V
Low
= 0 to 0.2 V @ 20 A Max.
V
High
= +3 V @ 100 A Max. to +5 V @ 200 A Max.
Operating Characteristics at 25C (0, +3 V)
1. All measurements made in a 50
system, unless otherwise specified.
2. DC = 300 kHz.
3. Insertion loss changes by 0.003 dB/C.
4. Insertion loss state.
5. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
PHEMT GaAs IC SPDT Switch DC3 GHz
AS179-92
2
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
Specifications subject to change without notice. 8/00A
V
1
V
2
J
1
J
2
J
1
J
3
V
High
0
Isolation
Insertion Loss
0
V
High
Insertion Loss
Isolation
Truth Table
V
High
= +3 to +5 V.
Pin Out
12
3
65
4
J
1
GND
C
BL
C
BL
C
BL
J
2
J
3
V
1
V
2
Typical Performance Data (0, +3 V)
Insertion Loss vs. Frequency
Frequency (GHz)
Insertion Loss (dB)
0.0
0.2
0.4
0.6
0.8
1.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
VSWR vs. Frequency
Frequency (GHz)
VSWR
0.0
0.5
1.0
1.5
2.0
2.5
3.0
1.0
1.1
1.2
1.3
1.4
Isolation vs. Frequency
Frequency (GHz)
Isolation (dB)
10
15
20
25
30
35
40
45
50
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Characteristic
Value
RF Input Power
6 W > 500 MHz
0/+7 V Control
Control Voltage
-0.2 V, +8 V
Operating Temperature
-40C to +85C
Storage Temperature
-65C to +150C
JC
25C/W
Absolute Maximum Ratings
DC blocking capacitors (C
BL
) must be supplied externally for
positive voltage operation.
C
BL
= 100 pF for operation >500 MHz.
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