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3 Watt Cellular T/R and Antenna Changeover Switch, DC - 3.0 GHz
SW-425
SW-425
3 Watt Cellular T/R and Antenna Changeover Switch, DC - 3.0 GHz
Features
* * * * * *
Low Cost Plastic SOT-26 Package Low Insertion Loss <0.6dB @ 1900 MHz Low Power Consumption <20A @ +3V Very High Intercept Point: 53 dBm IP3 Both Positive and Negative 2.5 to 8 V Control For CDMA, W-CDMA, TDMA, GSM, PCS and DCS Applications
SOT-26 Plastic Package
XX#Y
PIN 1
Description
M/A-COM's SW-425 is a GaAs monolithic switch in a low cost SOT-26 surface mount plastic package. The SW-425 is ideally suited for applications where very low power consumption (<10A@5V), low intermodulation products and very small size are required. Typical applications include Internal/External antenna select switch for portable telephones and data radios. In addition, because of its low loss, good isolation and inherent speed, the SW-425 can be used as a conventional T/R switch or as an antenna diversity switch. The SW-425 can be used in power applications up to 3 watts in systems such as celluar PCS, CDMA, W-CDMA, TDMA, GSM and other analog/digital wireless communications systems. The SW-425 is fabricated using a new 0.5 micron gate length GaAs PHEMT process. The process features full chip passivation for increased performance and reliability.
Ordering Information
Part Number SW-425 PIN SW-425TR SW-425RTR Package SOT-26 Plastic Package 1 Forward Tape and Reel 1 Reverse Tape and Reel
Electrical Specifications TA = 25C
Parameter Insertion Loss Insertion Loss Insertion Loss Isolation Isolation Isolation VSWR P1dB (3V supply) P1dB (5V supply) Input IP2 Input IP3 Harmonics Harmonics Trise, Tfall Ton, Toff Transients Gate Leakage Current 2 rd 3
nd
1. Reference Application Note M513 for reel size information. Units dB dB dB dB dB dB dBm dBm dBm dBm dBc dBc nS nS mV A Min. Typ. 0.4 0.55 0.7 20 15 12 1.2:1 34 36 70 53 70 48 75 75 60 20 20 10 Max. 0.5 0.65 0.8
Test Conditions DC - 1 GHz 1- 2 GHz 2 - 3 GHz DC - 1 GHz 1 - 2 GHz 2 - 3 GHz DC - 3 GHz 500 MHz - 3 GHz 500 MHz - 3 GHz 2-Tone, 5 MHz spacing, 0.9 GHz +10 dBm (+13 dBm total) VCTL=3V 2-Tone, 5 MHz spacing, 0.9 GHz +10 dBm (+13 dBm total) VCTL=3V Pin 30 dBm |VCTL| = 3V Pin 33 dBm |VCTL| = 5V 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, Control to 10% RF In-Band VCTL = 3 V
18 13 10 32 34 62 48 65 45 65 65
1.4:1
2nd 3rd
20
V2.00
M/A-COM Division of AMP Incorporated 3 North America: Tel. (800) 366-2266, Fax (800) 618-8883 3 Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087 3 Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
www.macom.com
AMP and Connecting at a Higher Level are trademarks. Specifications subject to change without notice.
3 Watt Cellular T/R and Antenna Changeover Switch, DC - 3.0 GHz
SW-425
Absolute Maximum Ratings
Parameter Max. Input Power (0.5 - 3.0 GHz) 3 V Control 5 V Control Operating Temperature Storage Temperature
1
Functional Diagram
VA RFC VB
Absolute Maximum +36 dBm +38 dBm -40C to +85C -65C to +150C
1. Exceeding any one or combination of these limits may cause permanent damage.
PIN 1
Truth Table
Mode (Control) Positive1 Postitive/ Negative1,2 Negative3 Control A
00.2V +2.5 to +8V -Vc0.2V +Vc 00.2V -2.5V to -8V
RF1
Control B
+2.5 to +8V 00.2V +Vc -Vc0.2V -2.5V to -8V 00.2V
GND
RF2
RFC - RF1 RFC - RF2
Off On Off On On Off On Off On Off Off On
PIN Configuration
PIN No. 1 2 3 4 5 6 Function RF1 GND RF2 VB RFC VA Description RF in/out RF Ground RF in/out V Control B RF COMMON V Control A
1. External DC blocking capacitors are required on all RF ports. 39pF capacitors used for positive control voltage. 2. |-VCTL|, VCTL 8 V 3. If negative control is used, DC blocking capacitors are not required on RF Ports.
Handling Procedures
The following precautions should be observed to avoid damage:
Static Sensitivity Gallium arsenide Integrated Circuits are ESD sensitive and can be damaged by static electricity. Proper ESD techniques should be used when handling these devices.
V2.00 M/A-COM Division of AMP Incorporated 3 North America: Tel. (800) 366-2266, Fax (800) 618-8883 3 Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087 3 Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
www.macom.com
AMP and Connecting at a Higher Level are trademarks. Specifications subject to change without notice.
3 Watt Cellular T/R and Antenna Changeover Switch, DC - 3.0 GHz
SW-425
Typical Performance Curves
Input Compression Point vs. VCTL at 900 MHz
40 38 36 34 32 30 28 26 24 22 20 2.5 3 3.5
P1dB *
3 Harmonic vs. VCTL at fO = 900 MHz
90 85 80 75 70 65 60 55 50 45 40 35 30 2.5 3 3.5 4 HARMONICS (dBc)
rd
COMPRESSION (dBm)
P0.1dB
Pin=31dBm Pin=30dBm Pin=29dBm Pin=28dBm
Pin=34dBm Pin=33dBm
*Above VCTL=4V, P1dB is not measurable due to thermal runaway conditions
4
4.5
5
5.5
6
6.5
7
7.5
8
4.5
5
5.5
6
6.5
7
7.5
8
VCTL (V)
VCTL (V)
2nd Harmonic vs. VCTL at fO = 900 MHz
90
INSERTION LOSS (dB)
Insertion Loss vs. Frequency and Temperature
1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 0.5
85C
HARMONICS (dBc)
85 80 75 70 65 60 55 50 2.5 3 3.5 4
Pin=29dBm
Pin=28dBm
25C
Pin=30dBm
Pin=33dBm Pin=31dBm Pin=34dBm
-40C
4.5
5 5.5 VCTL (V)
6
6.5
7
7.5
8
1
1.5 FREQUENCY (GHz)
2
2.5
3
Isolation vs. Frequency and Temperature
50 45 ISOLATION (dB) 40 VSWR 35 30 25 20 15 10 0 0.5 1 1.5 FREQUENCY (GHz) 2 2.5 3 1
85C, -40C, 25C
VSWR vs. Frequency and Temperature
1.5 1.4 1.3
25C
1.2 1.1
85C
-40C
0
0.5
1
1.5 FREQUENCY (GHz)
2
2.5
3
V2.00 M/A-COM Division of AMP Incorporated 3 North America: Tel. (800) 366-2266, Fax (800) 618-8883 3 Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087 3 Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
www.macom.com
AMP and Connecting at a Higher Level are trademarks. Specifications subject to change without notice.

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