Data
sheet
www.bookham.com Thinking RF solutions
GaAs MMIC SP4T
Reflective Switch,
DC - 2GHz
The P35-4250-3 is a high performance Gallium Arsenide
single pole four throw broadband RF switch. It is suitable for
use in broadband communications and instrumentation
applications. A short circuit reflective termination is presented
at the isolated outputs of the switch. Control is effected by
the application of complimentary 0V and -5V levels to the
control lines in accordance with the truth table below.
This die is fabricated using Bookham's 0.5mm gate length
MESFET process (S20) and is fully protected using Silicon
Nitride passivation for excellent performance and
reliability. This device is packaged in a low-cost surface-
mount plastic package.
Features
•Broadband performance
•Low insertion loss;
0.7dB typ at 1GHz
•Ultra low DC power consumption
•Fast switching speed;
3nS typical
•SO16 surface mount package
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Electrical Performance
Ambient temperature = 22±3°C, Zo = 50Ω, Control voltages = 0V/-5V unless otherwise stated
P35-4250-3
Parameter Conditions Min Typ Max Units
Insertion Loss1DC - 1GHz - 0.7 0.9 dB
1 - 2GHz - 0.9 1.1 dB
Isolation1DC - 1GHz 26 28 - dB
1 - 2GHz 16 20 - dB
Input Return Loss2DC - 1GHz 21 28 - dB
1 - 2GHz 14 25 - dB
Output Return Loss2DC - 1GHz 21 28 - dB
1 - 2GHz 14 22 - dB
1dB power compression point30/-5V Control; 50MHz - 19 - dBm
0/-5V Control; 2GHz - 22.5 - dBm
0/-8V Control; 50MHz - 21.5 - dBm
0/-8V Control; 2GHz - 30 - dBm
Switching Speed 50% Control to 10%90%RF - 3 - ns
Notes
1. Insertion Loss and Isolation measured between RF input and any output.
2. Return Loss measured in low loss switch state.
3. Input power at which insertion loss compresses by 1dB.
Typical Performance at 22° C
Insertion Loss Isolation
Input Return Loss Output Return Loss
Absolute Maximum Ratings
Max control voltage -8V
Max I/P power +30 dBm
Operating temperature -40°C to +85°C
Storage temperature -65°C to +150°C
Package Outline Electrical Schematic
Package Pin Out
Switching Truth Table
Ordering Information
P35-4250-3
www.bookham.com 462/SM/00074/200 Issue 1
© Bookham Technology 2003 Bookham is a registered trademark of Bookham Technology plc
MMICS
Bookham Technology plc
Caswell
Towcester
Northamptonshire
NN12 8EQ
UK
• Tel: +44 (0) 1327 356 789
• Fax: +44 (0) 1327 356 698
rfsales@bookham.com
Important Notice
Bookham Technology has a policy of
continuous improvement. As a result
certain parameters detailed on this flyer
may be subject to change without notice.
If you are interested in a particular product
please request the product specification
sheet, available from any RF sales
representative.
P35-4250-3
Pin Function Pin Function Pin Function Pin Function
1 A4 5 Ground 9 B2 13 RF3
2 RF4 6 RF1 10 A2 14 A3
3 Ground 7 A1 11 RF2 15 B3
4 RF IN 8 B1 12 Ground 16 B4
Control Pin Voltage (V) Path From RF IN to
A1 B1 A2 B2 A3 B3 A4 B4 RF1 RF2 RF3 RF4
-5 0 0 -5 0 -5 0 -5
Low Loss Isolated Isolated Isolated
0-5 -5 0 0 -5 0 -5
Isolated Low Loss Isolated Isolated
0 -5 0 -5 -5 0 0 -5
Isolated Isolated Low Loss Isolated
0-5 0 -5 0 -5 -5 0
Isolated Isolated Isolated Low Loss
