ETC P35-4227-0

P35-4227-0
Marconi Optical Components
GaAs MMIC SPDT
Reflective/Terminated
Switch, DC - 6GHz
Features
·
·
·
·
·
Broadband performance
High Isolation; 40dB typ at 3GHz
Low insertion loss; 0.8dB typ at 3GHz
Ultra low DC power consumption
Fast switching speed; 3ns typical
Description
The P35-4227-0 is a high performance Gallium Arsenide single pole double throw broadband RF switch. It is suitable for
use in broadband communications and instrumentation applications. The RF outputs can be terminated with either a 50Ω
load or short circuit. The switch is controlled by the application of complimentary 0V/-5V or 0/-8V signals to the control
lines in accordance with the truth tables below. There is a choice of two line or four line control. Four line control allows
the use of an 'all-off' state.
This die is fabricated using MOC’s 0.5µm gate length MESFET process (S20) and is fully protected using Silicon Nitride
passivation for excellent performance and reliability. This device is also available in a range of packages.
Electrical Performance
Ambient temperature = 22±3°C , ZO = 50Ω , Control voltages = 0V/-5V unless otherwise stated
Parameter
Insertion Loss
Isolation
Input Return Loss1
Output Return Loss1
1dB power
compression point2
Switching Speed
Third Order Intercept3
Conditions
DC - 1GHz
1 - 4GHz
4 - 6GHz
DC - 1GHz
1 - 4GHz
4 - 6GHz
DC - 1GHz
1 - 4GHz
4 - 6GHz
DC - 1GHz
1 - 4GHz
4 - 6GHz
0/-5V Control; 50MHz
0/-5V Control;2GHz
0/-8V Control; 50MHz
0/-8V Control; 2GHz
50% Control to 10%90%RF
500MHz
Notes
1. Return Loss measured in low loss switch state.
2. Input power at which insertion loss compresses by 1dB.
3. Input power 10dBm/tone.
Reflective
Min Typ Max
48
34
30
20
18
15
20
18
15
-
0.8
1.0
1.3
45
35
32
27
26
25
30
28
25
20
27
22
30
3
46
1.2
1.3
1.8
8
-
Terminated
Min Typ Max
Units
-
48
34
30
20
18
15
20
18
15
-
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
dBm
dBm
ns
dBm
0.7
0.9
1.2
55
40
33
24
20
18
24
24
20
21
27
22
30
3
46
1.2
1.3
1.6
8
-
Typical Performance at 22°C
Insertion Loss
Isolation
Input Return Loss
Output Return Loss
Absolute Maximum Ratings
Max control voltage
Max I/P power
Operating temperature
Storage temperature
-8V
+30 dBm
-60°C to +125°C
-65°C to +150°C
P35-4227-0
Marconi Optical Components
Chip Outline
Die size
Bond pad size
Die thickness:
Electrical Schematic
0.99 x 0.64mm
90µm x 90µm minimum
200µm
Switching Truth Table (2 line control)
1&2
3&4
RF IN-RF1
RF IN-RF2
0V
-5V
-5V
0V
Low loss
Isolated
Isolated
Low loss
Switching Truth Table (4 line control)
1
2
3
4
RF IN-RF1
RF IN-RF 2
0V
-5V
0V
0V
-5V
-5V
-5V
0V
-5V
-5V
0V
0V
Low loss
Isolated
Isolated
Isolated
Low loss
Isolated
Handling, Mounting and Bonding Instructions
The back of the die is gold metallized and can be die-attached manually onto gold, eutectically with Au-Sn (80:20) or with
low temperature conductive epoxy. The maximum allowable die temperature is 310°C for 2 minutes. Bonds should be
made onto the exposed gold pads with 17 or 25 microns pure gold or half-hard gold wire. Bonding should be achieved
with the die face at 225°C to 275°C with a heated thermosonic wedge (approx. 125°C) and a maximum force of 60 grams.
Ball bonds may be used but care must be taken to ensure the ball size is compatible with the bonding pads shown. The
length of the bond wires should be minimised to reduce parasitic inductance, particularly those to the RF and ground
pads.
If all four control pads are uniquely connected then the 'all-off' state is achievable in accordance with the truth table above.
Alternatively simpler two-line control may be used, whereby each control line should be bonded to a pair of control pads.
If the RF outputs are to be terminated in a 50Ω load then the pads marked 'T' should be connected to ground. Otherwise
the pads marked 'R' should be grounded to provide a short circuit termination.
Ordering Information: P35-4227-0
462/SM/00042/200 Iss 1/2
The data and product specifications are subject to change without notice. These devices
should not be used for device qualification and production without prior notice.
© Marconi Optical Components Ltd 2001
MOC, Caswell, Towcester, Northants, NN12 8EQ, Tel:+44 1327 356468 Fax +44 1327 356698
www.moc.marconi.com