ALPHA AS179-92 Datasheet
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 DC–3 GHz
Features
■ P
1 dB
+30 dBm Typical @ +3 V
■ IP3 43 dBm Typical @ +3 V
■ Low Insertion Loss (0.3 dB @ 0.9 GHz)
■ Low DC Power Consumption
■ Ultra Miniature SC-70 6 Lead Package
■ 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
DC–1.0 GHz 0.3 0.4 dB
DC–3.0 GHz 0.4 0.6 dB
Isolation DC–1.0 GHz 22 25 dB
DC–2.0 GHz 22 25 dB
DC–3.0 GHz 20 23 dB
VSWR
4
DC–1.0 GHz 1.2:1 1.4:1
DC–2.0 GHz 1.2:1 1.4:1
DC–3.0 GHz 1.3:1 1.4:1
Electrical Specifications at 25°C (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 0.5–3.0 GHz +30 dBm
0/+5 V 0.5–3.0 GHz +34 dBm
Intermodulation Intercept Point (IP3) For Two-tone Input Power +5 dBm
0/+3 V 0.5–3.0 GHz +43 dBm
0/+5 V 0.5–3.0 GHz +50 dBm
Control Voltages V
Low
= 0 to 0.2 V @ 20 µA Max.
V
High
= +3 V @ 100 µA Max.to +5 V @ 200 µA Max.
Operating Characteristics at 25°C (0, +3 V)
1.All measurements made in a 50 Ω 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 DC–3 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
J1–J
2
J1–J
3
V
High
0 Isolation Insertion Loss
0V
High
Insertion Loss Isolation
Truth Table
V
High
= +3 to +5 V.
Pin Out
123
654
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 -40°C to +85°C
Storage Temperature -65°C to +150°C
Θ
JC
25°C/W
Absolute Maximum Ratings
DC blocking capacitors (CBL) must be supplied externally for
positive voltage operation.
C
BL
= 100 pF for operation >500 MHz.
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