ETC AS125-73

GaAs IC SPDT Reflective Switch
Positive Control DC–2.5 GHz
AS125-73
Features
SOT-6
■ Low Insertion Loss (0.4 dB @ 0.9 GHz)
0.074
(1.90 mm REF.)
■ Complementary Positive Control Voltages
(0/+3 V to 0/+5 V)
■ Positive Voltage Supply (+3 to +5 V)
■ Low DC Power Consumption
0.126 (3.20 mm)
0.087 (2.20 mm)
PIN 6
0.071 (1.80 mm)
0.052 (1.30 mm)
PIN 1
INDICATOR
PIN 1
0.020 (0.51 mm)
0.014 (0.350 mm)
0.037 (0.95 mm) REF.
■ Ultra Miniature 6 Lead SOT-6 Package
Description
The AS125-73 is a GaAs IC FET SPDT reflective switch
in the SOT-6 plastic package for commercial applications.
For positive operation it requires a fixed positive bias (VS)
on the J1 line and DC blocks on all RF lines. This switch
can also be operated with complementary negative
voltage (no VS or blocking caps required). The AS125-73
provides a low cost solution for IF switching requirements
in dual band and dual mode subscribers.
0.057 (1.45 mm)
0.035 (0.90 mm)
0.006
(0.15 mm)
0.000
(0.00 mm)
0.012
(0.30 mm)
TYP.
5.0˚ ± 1˚
0.014
(0.26 mm)
0.004
(0.10 mm)
5.0˚ ± 1˚
0.122 (3.10 mm)
0.106 (2.70 mm)
0.022 (0.61 mm)
0.004 (0.10 mm)
Electrical Specifications at 25°C (0, +3 V)
Parameter1
Frequency2
Insertion Loss3
DC–0.5
DC–1.0
DC–2.0
DC–2.5
GHz
GHz
GHz
GHz
Isolation
DC–0.5
DC–1.0
DC–2.0
DC–2.5
GHz
GHz
GHz
GHz
VSWR4
DC–1.0 GHz
DC–2.5 GHz
Min.
22
17
11
10
Typ.
Max.
Unit
0.4
0.45
0.6
0.9
0.5
0.6
0.8
1.1
dB
dB
dB
dB
25
20
14
13
dB
dB
dB
dB
1.2:1
1.5:1
1.3:1
1.7:1
Typ.
Max.
Operating Characteristics at 25°C (0, +3 V)
Parameter
Switching
Characteristics5
Input Power for 1 dB Compression
Condition
Frequency
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
Min.
Unit
10
20
25
ns
ns
mV
0/+3 V
0/+5 V
0.5–2.0 GHz
0.5–2.0 GHz
+21
+28
dBm
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +13 dBm
0.5–2.0 GHz
+45
dBm
Control Voltages
VLow = 0 to 0.2 V @ 20 µA Max.
VHigh = +3 V @ 100 µA Max. to +5 V @ 200 µA Max.
VS = VHigh ± 0.2 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.
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 3/99A
1
GaAs IC SPDT Reflective Switch Positive Control DC–2.5 GHz
AS125-73
Typical Performance Data (0, +3 V)
1.4
40
1.2
35
30
25
0.8
dB
dB
1.0
0.6
20
15
0.4
10
0.2
5
0
0
0
0.5
1.0
1.5
2.0
0
2.5
0.5
1.0
1.5
2.0
2.5
Frequency (GHz)
Frequency (GHz)
Insertion Loss vs. Frequency
Isolation vs. Frequency
Absolute Maximum Ratings
2.0
Characteristic
1.8
2 W > 500 MHz
0/+7 V Control
Control Voltage
-0.2 V, +8 V
1.6
1.4
Value
RF Input Power
Operating Temperature
-40°C to +125°C
Storage Temperature
-50°C to +150°C
ΘJC
1.2
25°C/W
1
0
0.5
1.0
1.5
2.0
2.5
Pin Out
Frequency (GHz)
V1
V2
J1–J2
J1–J3
0
VHigh
Isolation
Insertion
VHigh
0
Insertion
Isolation
VHigh = +3 to +5 V (VS = VHigh ± 0.2 V).
2
V2
4
J1
5
Positive Operation
6
GND
Truth Table
V1
3
CBL
2
J3
1
VSWR vs. Frequency
CBL
CBL
J2
10 kΩ
VS
DC blocking capacitors (CBL) and biasing resistor must be supplied externally
for positive voltage operation.
CBL = 100 pF for operation >500 MHz.
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 3/99A