SW-438
GaAs SPDT Switch
DC - 3.0 GHz
Features
•
•
•
•
Low Insertion Loss, 0.7 dB @ 2.4 GHz
High Isolation, 25 dB @ 2.4 GHz
1
Low Power Consumption, < 10 µA @ +3 V
Low Cost Plastic SOT-363 Package
1
Rev. V6
Functional Schematic
C=100pF
C=8pF
C=100pF
C=100pF
C
≥
39pF
C=100pF
V1
RFC
V2
V1
RFC
V2
1. For best results at 2.4 GHz, use 8 pF 0402 profile SMT
capacitors on RF ports and 100 pF bypassing on pins 4
and 6.
Description
The SW-438 is a GaAs MMIC SPDT switch in a low
cost SOT-363 surface mount plastic package.
Typical applications include transmit/receive
switching for Bluetooth and WLAN equipment. The
SW-438 can also be used in applications up to 500
mW in systems such as cellular, PCS, DCS1800,
GSM, CDMA and other analog and digital wireless
communications systems.
M/A-COM fabricates the SW-438 using a 0.5
micron gate length GaAs p-HEMT process. The
process features full passivation for increased
performance and reliability.
RF1
GND
RF2
RF1
GND
RF2
PIN 1
2.4 GHz Application
C=8pF
C=8pF
PIN 1
Broad Band Applications
C
≥
39pF
C
≥
39pF
Pin Configuration
Pin No.
1
2
3
4
5
6
Function
RF1
GND
RF2
V2
RFC
V1
Description
RF Input/Output
RF Ground
RF Input/Output
Control 2 Input
RF Common Port
Control 1 Input
External Component Requirements
Please note the values of the external capacitors.
The capacitors at each of the RF ports are used as
for achieving optimum insertion loss. They also
provide DC blocking for positive control. The 8 pF
(0402) capacitor is recommended for 2 - 3 GHz
operation. If this value is changed or the capacitor
placed too far from the switch, the performance will
be affected. We also recommend 100 pF bypass
capacitors on pins 4 and 6.
For broadband applications with positive control
voltages, use DC blocking capacitors with value of
39 pF or more.
Absolute Maximum Ratings
3
Parameter
Input (0.5-3.0 GHz)
3 V Control
5 V Control
Operating Voltage
Operating Temperature
Storage Temperature
Absolute Maximum
+30 dBm
+33 dBm
+8.5 Volts
-40°C to +85°C
-65°C to +150°C
Ordering Information
Part Number
SW-438TR-3000
SW-438SMB
2
3. Exceeding any one or combination of these limits may cause
permanent damage to this device.
Package
SW-438 on 13 Inch, 3000 piece reel
SW-438 sample test board
2. Reference Application Note M513 for reel size information.
1
ADVANCED:
Data Sheets contain information regarding a product M/A-COM Technology Solutions
•
North America
Tel: 800.366.2266 •
Europe
Tel: +353.21.244.6400
is considering for development. Performance is based on target specifications, simulated results,
•
India
Tel: +91.80.43537383
•
China
Tel: +86.21.2407.1588
and/or prototype measurements. Commitment to develop is not guaranteed.
Visit www.macomtech.com for additional data sheets and product information.
PRELIMINARY:
Data Sheets contain information regarding a product M/A-COM Technology
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.
SW-438
GaAs SPDT Switch
DC - 3.0 GHz
Electrical Specifications: T
A
= 25°C, 3V Control
Parameter
Insertion Loss
Isolation
Rev. V6
Test Conditions
DC-3.0 GHz
DC-1.0 GHz
1.0-2.0 GHz
2.0-3.0 GHz
DC-1.5 GHz
1.5-3.0 GHz
500 MHz-2.0 GHz
500 MHz-2.0 GHz
2-tone 900 MHz, 5 MHz spacing (2.3V)
2-tone 900 MHz, 5 MHz spacing (2.3V)
2.4 GHz Pin = 20 dBm, Vc = 2.3V
2.4 GHz Pin = 20 dBm, Vc = 2.3V
50% ctl to 10/90% RF
10% to 90% RF
|Vctl| = 5V
Units
dB
dB
dB
dB
dB
dB
dBm
dBm
dBm
dBm
dBc
dBc
ns
ns
µA
Min
Typ
0.7
Max
0.8
29
23
21
18
16
23
28
31
25
23
22
20
26
31
81
55
70
60
20
10
5
10
Return Loss
P1dB (2.3 V supply)
P1dB (3V supply)
IP2
IP3
2
nd
Harmonic
3
rd
Harmonic
Ton, Toff
Trise, Tfall
Gate Leakage
SC-70 (SOT-363) Plastic Package
Truth Table
Mode
(Control)
Positive
4
Negative
5
V1
0 + 0.2V
+2.3 to +5V
0 + 0.2V
-2.3 to -5V
V2
+2.3 to +5V
0 + 0.2V
-2.3 to -5V
0 + 0.2V
RFC-
RF1
On
Off
Off
On
RFC-
RF2
Off
On
On
Off
4. For positive voltage control, external DC blocking capacitors
are required on all RF ports.
5. If negative control is used, DC blocking capacitors are not
required on RF ports. This switch is not intended to pass or
switch a DC voltage.
2
ADVANCED:
Data Sheets contain information regarding a product M/A-COM Technology Solutions
•
North America
Tel: 800.366.2266 •
Europe
Tel: +353.21.244.6400
is considering for development. Performance is based on target specifications, simulated results,
•
India
Tel: +91.80.43537383
•
China
Tel: +86.21.2407.1588
and/or prototype measurements. Commitment to develop is not guaranteed.
Visit www.macomtech.com for additional data sheets and product information.
PRELIMINARY:
Data Sheets contain information regarding a product M/A-COM Technology
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.
SW-438
GaAs SPDT Switch
DC - 3.0 GHz
Typical Performance Curves
Bluetooth Applications
(8 pF DC Blocking Capacitors, +2.3V Control)
Insertion Loss vs. Frequency Over Temperature
1.0
Rev. V6
Broadband Applications
(No DC Blocking Capacitors, -2.3 V Control)
Insertion Loss vs. Frequency Over Temperature
1.0
0.8
0.8
0.6
0.6
0.4
+25°C
-40°C
+85°C
0.4
+25°C
-40°C
+85°C
0.2
0.2
0.0
2.0
2.2
2.4
2.6
2.8
3.0
0.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Frequency (GHz)
Frequency (GHz)
Isolation
vs. Frequency Over Temperature
30
Isolation vs. Frequency Over Temperature
60
28
+25°C
-40°C
+85°C
50
+25°C
-40°C
+85°C
26
40
24
30
22
20
2.0
2.2
2.4
2.6
2.8
3.0
20
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Frequency (GHz)
Frequency (GHz)
3
ADVANCED:
Data Sheets contain information regarding a product M/A-COM Technology Solutions
•
North America
Tel: 800.366.2266 •
Europe
Tel: +353.21.244.6400
is considering for development. Performance is based on target specifications, simulated results,
•
India
Tel: +91.80.43537383
•
China
Tel: +86.21.2407.1588
and/or prototype measurements. Commitment to develop is not guaranteed.
Visit www.macomtech.com for additional data sheets and product information.
PRELIMINARY:
Data Sheets contain information regarding a product M/A-COM Technology
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.
SW-438
GaAs SPDT Switch
DC - 3.0 GHz
Typical Performance Curves
Bluetooth Applications
(8 pF DC Blocking Capacitors, +2.3V Control)
Return Loss vs. Frequency Over Temperature
35
+25°C
-40°C
+85°C
Rev. V6
Broadband Applications
(No DC Blocking Capacitors, -2.3 V Control)
Return Loss vs. Frequency Over Temperature
35
+25°C
-40°C
+85°C
30
30
25
25
20
20
15
15
10
2.0
2.2
2.4
2.6
2.8
3.0
10
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Frequency (GHz)
Frequency (GHz)
4
ADVANCED:
Data Sheets contain information regarding a product M/A-COM Technology Solutions
•
North America
Tel: 800.366.2266 •
Europe
Tel: +353.21.244.6400
is considering for development. Performance is based on target specifications, simulated results,
•
India
Tel: +91.80.43537383
•
China
Tel: +86.21.2407.1588
and/or prototype measurements. Commitment to develop is not guaranteed.
Visit www.macomtech.com for additional data sheets and product information.
PRELIMINARY:
Data Sheets contain information regarding a product M/A-COM Technology
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.
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