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PRELIMINARY INFORMATION
2 V Dual-Mode WCDMA & Dual-Band GSM/DCS Switch
VER 1.
SW-488
Rev 1.2
0.5 - 2.0 GHz
Features
* * * * * GSM Power Handling with +2.0 V Control Voltage Low Power Consumption. Less than 1A current in Receive mode. Integrated Decoder. Leadless 4 x 4mm FQFP -N, 20 Pin Package. Low Insertion Loss, 0.3 dB in GSM Transmit mode.
Functional Schematic
WCDMA
ANT1
GND
GND
ANT2
GND
DRX
GND
DRXS
GRX
GND
GND
DTX
Decoder
Description
The M/A-COM SW-488 is a GaAs monolithic switch in a low cost, FQFP-N, surface mount plastic package. The SW-488 is ideally suited for applications where very low power consumption, high power handling, and low cost are required. The SW-488 includes an integrated decoder. The switch offers GSM power handling with below +2.5V control voltage. The supply voltage VDD should be connected to the highest available voltage. The SW-488 is fabricated using a new 0.5-micron gate length GaAs pHEMT process. The process features full chip passivation for increased performance and reliability. This switch is designed for Dual Mode WCDMA/GSM/DCS handsets where the phone needs to be able to simultaneously receive a WCDMA and GSM signal.
GTX
GND
GND
TXS
Ordering Information
Part Number SW-488TR SW-488TR-3000 Description SW-488 on 1000 Piece Tape and Reel SW-488 on 3000 Piece Tape and Reel
SW-488SMB SW-488 Sample Test Board * If specific reel size is required, consult factory for part number assignment
The Prelim inary Specifications Data Sheet Contains Typical Electrical Specifications Which May Change Prior to Final Introduction.
M/A-COM, Inc.
North America: Tel. (800) 366-2266 Fax (800) 618-8883 Asia/Pacific: Tel. +81 3 3263-8761 Fax +81 3 3263-8769 Europe:
PRXON
VDD
BS
1
Tel. +44 (1344) 869-595 Fax +44 (1344) 300-020
2V Control, Dual -Mode WCDMA & Dual-Band GSM/DCS Tx/Rx Switch
SW-488
V1.2
ELECTRICAL CHARACTERISTICS: Test Conditions: VDD = 2.5V, Vctrl =2.0V, TA = +25C
Mode ANT2 -> GSM RX ANT1 -> UMTS Tx ANT1 -> UMTS Rx Specifications Insertion Loss Insertion Loss Insertion Loss Isolation ANT1 to DCS Tx Isolation ANT2 to GSM Tx Isolation UMTS to DCS Rx Isolation UMTS to GSM Rx Isolation UMTS to GSM Tx Isolation DCS Tx to DCS Rx Isolation DCS Tx to GSM Rx Isolation GSM Tx to DCS Rx Isolation GSM Tx to GSM Rx Insertion Loss Isolation ANT1 to DCS Tx Isolation ANT2 to GSM Tx Isolation DCS Tx to DCS Rx Isolation DCS Tx to GSM Rx Isolation GSM Tx to DCS Rx Isolation GSM Tx to GSM Rx Insertion Loss Isolation GSM Tx to UMTS Isolation GSM Tx to DCS Rx Isolation GSM Tx to GSM Rx Isolation DCS Tx to DCS Rx Isolation DCS Tx to GSM Rx Insertion Loss Isolation DCS Tx to UMTS Isolation DCS Tx to DCS Rx Isolation DCS Tx to GSM Rx Isolation GSM Tx to DCS Rx Isolation GSM Tx to GSM Rx See attached data See attached data Freq. (MHz) 925 -960 1920-1980 2110-2170 1710-1785 880 - 915 1920 -1980 1920 -1980 1920 -1980 1710 - 1785 1710 - 1785 880 - 915 880 - 915 1805 -1880 1710 - 1785 880 - 915 1710 - 1785 1710 - 1785 880 - 915 880 - 915 880 - 915 880 - 915 880 - 915 880 - 915 1710 - 1785 1710 - 1785 1710 -1785 1710 -1785 1710 -1785 1710 -1785 880 - 915 880 - 915 Units dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dBc dBc Volts Volts Volts Min. 0.54 0.65 0.7 22 15 30 30 30 30 30 30 15 0.74 20 10 20 30 30 30 0.24 30 30 25 30 30 0.54 20 30 30 30 30 -84 -79 2.0 2.0 -0.2 Typ. 0.6 0.7 0.75 22 15 30 30 30 30 30 30 15 0.8 20 10 20 30 30 30 0.3 30 30 25 30 30 0.6 20 30 30 30 30 -80 -76 2.5 2.5 0 Max. 0.7 0.9 0.95 22 15 30 30 30 30 30 30 15 0.9 20 10 20 30 30 30 0.4 30 30 25 30 30 0.7 20 30 30 30 30 -70 -65 4.0 4.0 0.2
ANT1 -> DCS RX
ANT2 -> GSM TX
ANT1 -> DCS TX
2nd Harmonics 3rd Harmonics Supply Voltage High Control Voltages Low Control Voltages
1. 2.
DC blocking capacitors are required on all RF and shunt ports. All impedances are 50 ohms
The Preliminary Specifications Data Sheet Contains Typical Electrical Specifications Which May Change Prior to Final Introduction.
M/A-COM, Inc.
North America: Tel. (800) 366-2266 Fax (800) 618-8883 Asia/Pacific: Tel. +81 3 3263-8761 Fax +81 3 3263-8769 Europe:
2
Tel. +44 (1344) 869-595 Fax +44 (1344) 300-020
2V Control, Dual -Mode WCDMA & Dual-Band GSM/DCS Tx/Rx Switch
SW-488
V1.2
Pin Configuration
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Pin Name ANT2 GND GRX GND GTX GND VDD BS TXS PRXON GND DCS TX GND DCSRX_S DCSRX GND ANT 1 GND WCDMA GND GND Description GSM ANT Port
Block Diagram
WCDMA
ANT1
GND
GND
RF Ground GSM Rx Port RF Ground GSM Tx Port Decoder GND Decoder Vdd Control 1 Control 2 Control 3 RF Ground DCS Tx Port RF Ground DCS Rx Shunt DCS Rx Port RF Ground WCDMA/DCS ANT RF Ground WCDMA Port RF Ground Paddle
GTX GRX ANT2
GND
DRX
GND
DRXS
GND
GND
DTX
Decoder
GND
GND
Truth Table
BS 0 0 1 1 TXS 0 1 1 0 PRXON 0 0 0 0 MODE GSM RX - ANT2 WCDMA - ANT1 GSM TX - ANT2 DCS TX - ANT1 DCS RX - ANT1
Logic Level VLo "0"= VHi "1"=
Voltage Level 0V 2.5 V
The Preliminary Specifications Data Sheet Contains Typical Electrical Specifications Which May Change Prior to Final Introduction.
M/A-COM, Inc.
North America: Tel. (800) 366-2266 Fax (800) 618-8883 Asia/Pacific: Tel. +81 3 3263-8761 Fax +81 3 3263-8769 Europe:
PRXON
VDD
TXS
BS
3
Tel. +44 (1344) 869-595 Fax +44 (1344) 300-020
2V Control, Dual -Mode WCDMA & Dual-Band GSM/DCS Tx/Rx Switch
SW-488
V1.2
Sample Board Schematic
WCDMA ANT1
C8
C7
C1 ANT2
C6 DRX C5
C2 GRX C4 DTX C3 GTX
Decoder
VDD
BS
TXS
PRXON
External Circuitry Parts List (Note: Values of external elements not final)
Ref. Designation C1 C2 C3 C4 C5 C6 C7 C8
Value 22 pF 22 pF 22 pF 22 pF 4.7 pF 22 pF 22 pF 22 pF
Purpose DC Block DC Block DC Block DC Block RF Shunt DC Block DC Block DC Block
The Preliminary Specifications Data Sheet Contains Typical Electrical Specifications Which May Change Prior to Final Introduction.
M/A-COM, Inc.
North America: Tel. (800) 366-2266 Fax (800) 618-8883 Asia/Pacific: Tel. +81 3 3263-8761 Fax +81 3 3263-8769 Europe:
4
Tel. +44 (1344) 869-595 Fax +44 (1344) 300-020
2V Control, Dual -Mode WCDMA & Dual-Band GSM/DCS Tx/Rx Switch
SW-488
V1.2
SW-488 Harmonics at the GSM TX Port versus Pin Vdd=2.5V; Vcontrol=2.5V
0
-10
-20
-30 dBm
GSM 2H GSM 3H
-40
-50
-60
-70 28 29 30 31 Pin (dBm) 32 33 34 35
SW-488 Harmonics at the DCS TX Port versus Pin Vdd=2.5V; Vcontrol=2.5V
0
-10
-20
-30 dBm DCS 2H DCS 3H -40
-50
-60
-70 26 27 28 29 Pin(dBm) 30 31 32 33
SW-488 Harmonics at the WCDMA Port versus Pin Vdd=2.5V; Vcontrol=2.5V
0
-10
-20
-30 WCDMA 2H WCDMA 3H -40 dBm -50 -60 -70 24 25 26 27 Pin(dBm) 28 29 30
The Preliminary Specifications Data Sheet Contains Typical Electrical Specifications Which May Change Prior to Final Introduction.
M/A-COM, Inc.
North America: Tel. (800) 366-2266 Fax (800) 618-8883 Asia/Pacific: Tel. +81 3 3263-8761 Fax +81 3 3263-8769 Europe:
5
Tel. +44 (1344) 869-595 Fax +44 (1344) 300-020
2V Control, Dual -Mode WCDMA & Dual-Band GSM/DCS Tx/Rx Switch
SW-488
V1.2
4 mm FQFP-N, 20-Lead
D D1 A A2
A3 A1
E
E1
20 x b D2 e
4xe
E2
L e 4xe
Dimension Min.
A A1 A2 A3 b D D1 D2 e E E1 E2 L 0.75 0.35 0.75 0.18 0.80 0 0
Measurement (mm) Nom.
0.90 0.02 0.65 0.25 ref. 0.23 4.00 basic 3.75 basic 1.70 0.50 basic 4.00 basic 3.75 basic 1.70 0.55 2.25 0.75 2.25 0.30
Max.
1.00 0.05 1.00
Note: See JEDEC MO-220A VGGD-1 for additional dimensional and tolerance information
The Preliminary Specifications Data Sheet Contains Typical Electrical Specifications Which May Change Prior to Final Introduction.
M/A-COM, Inc.
North America: Tel. (800) 366-2266 Fax (800) 618-8883 Asia/Pacific: Tel. +81 3 3263-8761 Fax +81 3 3263-8769 Europe:
6
Tel. +44 (1344) 869-595 Fax +44 (1344) 300-020

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