SPDT Switch. SW-438 Datasheet

SW-438 Switch. Datasheet pdf. Equivalent

Part SW-438
Description GaAs SPDT Switch
Feature www.DataSheet4U.com GaAs SPDT Switch DC– 3.0 GHz Functional Schematic GHz 1 C=100pF C=8pF C=100pF C.
Manufacture Tyco Electronics
Datasheet
Download SW-438 Datasheet



SW-438
www.DataSheet4U.com
GaAs SPDT Switch
DC– 3.0 GHz
V 1.00
Features
Low Insertion Loss, 0.7 dB @ 2.4 GHz1
High Isolation, 25 dB @ 2.4 GHz1
Low Power Consumption, < 10 µA @ +3 V
Low Cost Plastic SOT-363 Package
1. For best results at 2.4 GHz, use 8 pF 0402 profile SMT capaci-
tors 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 applica-
tions include transmit/receive switching for Bluetooth and
WLAN equipment. The SW-438 can also be used in applica-
tions up to 500 mW in systems such as cellular, PCS,
DCS1800, GSM, CDMA and other analog and digital wire-
less communications systems.
M/A-COM fabricates the SW-438 using a 0.5 micron gate
length GaAs p-HEMT process. The process features full pas-
sivation for increased performance and reliability.
External Component Requirements
Please note the values of the external capacitors. The ca-
pacitors 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 recom-
mended for 2 - 3 GHz operation. If this value is changed or
the capacitor placed too far from the switch, the perform-
ance 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.
Truth Table
Functional Schematic
C=100pF
C=8pF
C=100pF
C=100pF
V1 RFC V2
V1
C39pF
C=100pF
RFC V2
RF1 GND RF2
PIN 1
2.4 GHz Application
C=8pF
C=8pF
RF1 GND RF2
PIN 1
Broad Band Applications
C39pF
C39pF
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
Ordering Information
Part Number
SW-438TR-3000
SW-438SMB
Package
SW-438 on 13 Inch, 3000 piece Reel
SW-438 sample test board
Mode
(Control)
V1
V2 RFC-RF1
Positive1 0 + 0.2V +2.3 to +5V
+2.3 to +5V 0 + 0.2V
Off
On
Negative 2 0 + 0.2V -2.3 to +5V
-2.3 to +5V 0 + 0.2V
On
Off
RFC-RF2
On
Off
Off
On
1. External DC blocking capacitors are required on all RF ports.
2. If negative control is used, DC blocking capacitors are not required on RF ports.



SW-438
GaAs SPDT Switch, DC-3.0 GHz
SW-438
Electrical Specifications: TA = 25°C, 3V Control
V 1.00
Parameter
Test Conditions
Units Min Typ Max
Insertion Loss
DC-3.0 GHz
dB
0.7 0.8
Isolation
DC-1.0 GHz
1.0-2.0 GHz
2.0-3.0 GHz
dB 29 31
dB 23 25
dB 21 23
Return Loss
P1dB (2.3 V supply)
DC-1.5 GHz
1.5-3.0 GHz
500 MHz-2.0 GHz
dB
dB
dBm
18
16
23
22
20
26
P1dB (3V supply)
500 MHz-2.0 GHz
dBm
28
31
IP2
2-tone 900 MHz, 5 MHz spacing (2.3V)
dBm
81
IP3
2-tone 900 MNz, 5 MHz spacing (2.3V)
dBm
55
2nd Harmonic
2.4 GHz Pin = 20 dBm, Vc = 2.3V
dBc
70
3rd Harmonic
2.4 GHz Pin = 20 dBm, Vc = 2.3V
dBc
60
Ton, Toff
50% ctl to 10/90% RF
ns
20
Trise, Tfall
10% to 90% RF
ns
10
Gate Leakage
|Vctl| = 5V
µA
5 10
Typical Performance Curves
Bluetooth Applications
(8 pF DC Blocking Capacitors, +2.3V Control)
Insertion Loss vs. Frequency Over Temperature Isolation vs. Frequency Over Temperature
1.0
0.9
+85°C
0.8
+25°C
0.7
0.6
-40°C
0.5
0.4
0.3
0.2
0.1
0.0
2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0
Frequency (GHz)
30
29
28
27
26
+25°C
-40°C
25
24
+85°C
23
22
21
20
2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0
Frequency (GHz)
Specifications subject to change without notice.
n North America: Tel. (800) 366-2266
n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
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