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Advanced Product Information 1.1
FMS2022
DC-4 GHz MMIC SP4T Absorptive Switch
Functional Schematic Features:
Available in die form Suitable for WLAN Applications Low Insertion loss <1.3 dB at 4 GHz typical High isolation >30 dB at 4 GHz typical Absorptive
OUT1 GND OUT2 A2 B2 GND A1 B1 IN A4 GND B4 A3 B3 OUT4 GND OUT3
Description and Applications:
The FMS2022 is a low loss high isolation DC-4GHz single pole four throw Gallium Arsenide absorptive switch designed for use in WLAN Applications. The die is fabricated using the Filtronic FL05 0.5m switch process technology that offers leading edge performance optimised for switch applications.
Simulated Electrical Specifications:
Parameter
Insertion Loss Insertion Loss Isolation Isolation Return Loss (On state) Return Loss (Off state) Switching speed P1dB P1dB P1dB
(TAMBIENT = 25C, Vctrl = 0V/-5V), ZIN = ZOUT = 50)
Conditions
(DC-2) GHz (2-4) GHz (DC-2) GHz (2-4) GHz (DC-4) GHz (DC-4) GHz 50% control to 10% / 90% RF (1-100) MHz (100-500) MHz (0.5-40) GHz
Min
Typ
1 1.3 45 30 17 12 25 17 24 28
Max
Units
dB dB dB dB dB dB ns dBm dBm dBm
Note: External DC decoupling capacitors are required on all DC lines (typ: 47pF)
1
Preliminary specifications subject to change without notice Filtronic Compound Semiconductors Ltd Contact Details (UK): Tel: +44 (0) 1325 301111 Fax: +44 (0) 1325 306177 Email: sales@filcs.com Contact Details (USA): Tel: +1 (408) 850 5790 Fax: +1 (408) 850 5766 Email: sales@filcsi.com Website: www.filtronic.co.uk/semis
Advanced Product Information 1.1
FMS2022
Truth Table:
Control Lines RF Path
A1 B1 A2 B2 A3 B3 A4 B4 IN-OUT1 IN-OUT2 IN-OUT3 IN-OUT4
-5V 0V 0V 0V 0V -5V -5V -5V 0V -5V 0V 0V -5V 0V -5V -5V 0V 0V -5V 0V -5V -5V 0V -5V 0V 0V 0V -5V -5V -5V -5V 0V ON OFF OFF OFF OFF ON OFF OFF OFF OFF ON OFF OFF OFF OFF ON
Note: -5V 0.5V, 0V+0.5V
Pad Layout:
OUT1 GND1 OUT2 A2 B2 GND3 A1 B1 IN GND4 A4 B4 A3 B3 OUT4 GND2 OUT3
Pad Reference
IN OUT1 OUT2 OUT3 OUT4 A1 B1 A2 B2 A3 B3 A4 B4 GND1 GND2 GND3 GND4
Description
RFIN RFOUT1 RFOUT2 RFOUT3 RFOUT4 A1 B1 A2 B2 A3 B3 A4 B4 GND GND GND GND
Pin Coordinates (m)
142,657.5 142,1174 675,1174 675,141 142,141 805,878 805,731 805,1172 805,1025 805,290 805,143 805,584 805,437 504,1174 504,141 142,869 142,446
Note: Co-ordinates are referenced from the bottom left hand corner of the die to the centre of the bond pad opening Die Size ( m x m )
950 x 1320
Die Thickness (m)
150
Min. Bond Pad Pitch(m)
130
Min. Bond pad Opening (m xm )
94 x 94
2
Preliminary specifications subject to change without notice Filtronic Compound Semiconductors Ltd Contact Details (UK): Tel: +44 (0) 1325 301111 Fax: +44 (0) 1325 306177 Email: sales@filcs.com Contact Details (USA): Tel: +1 (408) 850 5790 Fax: +1 (408) 850 5766 Email: sales@filcsi.com Website: www.filtronic.co.uk/semis
Advanced Product Information 1.1
FMS2022
Simulated Performance:
Insertion Loss
-0.8 Insertion Loss (dB) -0.9 -1 -1.1 -1.2 -1.3 0 1 2 3 Frequency (GHz) 4
Isolation
-30 Isolation (dB) -40 -50 -60 -70
0
1
2 3 Frequency (GHz)
4
Return Loss
-10 Return Loss (dB) -15
On state
-20
Off state
-25 -30 -35 0 1 2 3 Frequency (GHz) 4
3
Preliminary specifications subject to change without notice Filtronic Compound Semiconductors Ltd Contact Details (UK): Tel: +44 (0) 1325 301111 Fax: +44 (0) 1325 306177 Email: sales@filcs.com Contact Details (USA): Tel: +1 (408) 850 5790 Fax: +1 (408) 850 5766 Email: sales@filcsi.com Website: www.filtronic.co.uk/semis
Advanced Product Information 1.1
FMS2022
Preferred Assembly Instructions:
GaAs devices are fragile and should be handled with great care. Specially designed collets should be used where possible. The back of the die is not metallised and the recommended mounting method is by the use of conductive epoxy. Epoxy should be applied to the attachment surface uniformly and sparingly to avoid encroachment of epoxy on to the top face of the die and ideally should not exceed half the chip height. For automated dispense Ablestick LMISR4 is recommended and for manual dispense Ablestick 84-1 LMI or 84-1 LMIT are recommended. These should be cured at a temperature of 150C for 1 hour in an oven especially set aside for epoxy curing only. If possible the curing oven should be flushed with dry nitrogen. This part has gold (Au) bond pads requiring the use of gold (99.99% pure) bondwire. It is recommended that 25.4m diameter gold wire is used. Thermosonic ball bonding is preferred. A nominal stage temperature of 150C and a bonding force of 40g has been shown to give effective results for 25m wire. Ultrasonic energy shall be kept to a minimum. For this bonding technique, stage temperature should not be raised above 200C and bond force should not be raised above 60g. Thermosonic wedge bonding and thermocompression wedge bonding can also be used to achieve good wire bonds. Bonds should be made from the die first and then to the mounting substrate or package. The physical length of the bondwires should be minimised especially when making RF or ground connections.
Handling Precautions:
To avoid damage to the devices care should be exercised during handling. Proper Electrostatic Discharge (ESD) precautions should be observed at all stages of storage, handling, assembly, and testing. These devices should be treated as Class 1A (0-500 V) as defined in JEDEC Standard No. 22-A114-B. Further information on ESD control measures can be found in MIL-STD-1686 and MILHDBK-263.
Disclaimers:
This product is not designed for use in any space based or life sustaining/supporting equipment.
4
Preliminary specifications subject to change without notice Filtronic Compound Semiconductors Ltd Contact Details (UK): Tel: +44 (0) 1325 301111 Fax: +44 (0) 1325 306177 Email: sales@filcs.com Contact Details (USA): Tel: +1 (408) 850 5790 Fax: +1 (408) 850 5766 Email: sales@filcsi.com Website: www.filtronic.co.uk/semis

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