GaAs IC High Power SPDT Switch
Positive Control DC–2.5 GHz
AS137-12
Features
■
High Linearity (IP3 55 dBm @ 0.9 GHz)
■
Low Insertion Loss (0.5 dB @ 0.9 GHz)
■
Low DC Power Consumption
■
Positive 3 V to 5 V Control Voltage
PIN 1
0.020 (0.51 mm) MAX.
0.049
(1.24 mm)
0.016
(0.41 mm)
0.016 MAX.
(0.41 mm) x
45˚ CHAMFER
PIN 1
INDICATOR
0.244 (6.20 mm)
0.228 (5.80 mm)
SOIC-8
PIN 8
0.050 (1.27 mm) BSC
Description
The AS137-12 is a FET IC SPDT switch in a SOIC-8
plastic package. This switch has been designed for use
where extremely high linearity and low insertion loss are
required. It is controlled with positive voltage, eliminating
the need for negative voltage. Some standard
implementations include antenna changeover, T/R and
diversity switching over 2 W. The AS137-12 switch can be
used in many analog and digital wireless communication
systems including cellular, GSM and DECT applications.
0.068
(1.73 mm) MAX.
0.197 (5.00 mm)
0.189 (4.80 mm)
0.010 (0.25 mm)
0.004 (0.10 mm)
0.158 (4.00 mm)
0.150 (3.80 mm)
0.010 (0.25 mm)
0.007 (0.17 mm)
8˚
MAX.
Electrical Specifications at 25°C (0, +5 V)
Parameter
1
Insertion
Loss
3
Frequency
2
DC–1.0 GHz
DC–2.0 GHz
DC–2.5 GHz
DC–1.0 GHz
DC–2.0 GHz
DC–2.5 GHz
DC–1.0 GHz
DC–2.0 GHz
DC–2.5 GHz
18
18
17
Min.
Typ.
0.45
0.60
0.90
21
22
20
1.20:1
1.25:1
1.30:1
1.3:1
1.3:1
1.4:1
Max.
0.55
0.75
1.20
Unit
dB
dB
dB
dB
dB
dB
Isolation
VSWR
4
Operating Characteristics at 25°C (0, +5 V)
Parameter
Switching Characteristics
5
Condition
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
@ +3 V
@ +5 V
For Two-tone Input Power +10 dBm
@ +5 V
V
Low
= 0 to 0.2 V @ 20 µA Max.
V
High =
+3 V @ 100 µA Max. to +5 V @ 200 µA Max.
V
S
= V
High
± 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.
Frequency
Min.
Typ.
60
100
50
Max.
Unit
ns
ns
mV
dBm
dBm
dBm
Input Power for 1 dB Compression
Intermodulation Intercept Point (IP3)
Control Voltages
1.9 GHz
1.9 GHz
1.9 GHz
+28.5
+35
+55
Skyworks Solutions, Inc.
[978] 241-7000
•
Fax
[978] 241-7906
•
Email
sales@skyworksinc.com
•
www.skyworksinc.com
Specifications subject to change without notice. 3/99A
1
GaAs IC High Power SPDT Switch Positive Control DC–2.5 GHz
AS137-12
Typical Performance Data (0, +5 V)
1.4
1.2
1.0
40
35
30
dB
dB
1
2
3
0.8
0.6
0.4
0.2
0
DC
85˚C
25˚C
-40˚C
25
20
15
10
DC
1
2
3
Frequency (GHz)
Frequency (GHz)
Insertion Loss vs. Frequency
1.7
1.6
1.5
Isolation vs. Frequency
Absolute Maximum Ratings
Characteristic
RF Input Power
Value
6 W Max. > 900 MHz,
0/+5 V Control
-0.2 V, +8 V
-40°C to +85°C
-65°C to +150°C
85°C/W
dB
1.4
1.3
1.2
1.1
DC
Control Voltage
Operating Temperature
Storage Temperature
Θ
JC
1
2
3
Pin Out
J
2
Frequency (GHz)
VSWR vs. Frequency
1
8
C
BL
GND
V
2
J
1
Truth Table
V
1
V
High
0
V
2
0
V
High
J
1
–J
2
Isolation
Insertion Loss
J
1
–J
3
Insertion Loss
Isolation
J
3
C
BL
2
3
4
7
C
BL
GND
6
5
V
S
V
1
V
High
= +3 to +5 V (V
S
= V
High
± 0.2 V).
DC blocking capacitors C
BL
must be supplied externally.
C
BL
= 100 pF.
2
Skyworks Solutions, Inc.
[978] 241-7000
•
Fax
[978] 241-7906
•
Email
sales@skyworksinc.com
•
www.skyworksinc.com
Specifications subject to change without notice. 3/99A
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