MA4AGSW8-2
SP8T AlGaAs PIN Diode Switch
Rev. V2
FEATURES
•
•
•
•
•
•
•
•
•
•
Specified Performance : 50 MHz to 40 GHz
Operational Performance: 50 MHz to 50 GHz
2.0 dB Typical Insertion Loss at 40 GHz
30 dB Typical Isolation at 40 GHz thru 3 Diodes
22 dB Typical Isolation at 40 GHz thru 2 Diodes
Low Current Consumption
•
10 mA for low loss state
•
0 Volts for Isolation state
M/A-COM’s Patented AlGaAs Hetero-Junction
Anode Technology.
Silicon Nitride Passivation
BCB Impact Protection
RoHS Compliant
CHIP LAYOUT
DESCRIPTION
M/A-COM’s MA4AGSW8-2 is an Aluminum-Gallium-
Arsenide (AlGaAs) anode enhanced, SP8T, PIN
diode series switch. Operation is accomplished with
10 mA applied to the low loss port and 0V for the
isolated ports. M/A-COM’s Technology Solutions
AlGaAs process utilizes a patented hetero-junction
technology which produces lower insertion loss than
conventional GaAs devices. These devices are
fabricated on an OMCVD epitaxial wafer using a
process designed for high device uniformity and
extremely low parasitics. The diodes used have low
series resistance, (3
Ω)
, low capacitance (20 fF) , and
fast switching speed (20 nS). The MA4AGSW8-2
device is fully passivated with silicon nitride, and has
an extra layer of polyamide for added scratch and
impact protection. This protective coating prevents
damage to the diode junction and anode air bridges
during handling and assembly. External RF to DC
bias networks which are optimized for the particular
operating band of interest are required.
Absolute Maximum Ratings
T
AMB
= +25°C
(Unless Otherwise Noted)
1
Parameter
Absolute Maximum
APPLICATIONS
The low capacitance of the internal PIN diodes makes
this switch ideal for use in many microwave
multi-throw switch designs. The low series resistance
of the diodes reduces the insertion loss at microwave
millimeter-wave frequencies. These AlGaAs PIN
switches can be used as switching arrays on radar
systems, optical switching networks, instrumentation,
and other wideband multi-throw switch assemblies.
1
D.C. Reverse Voltage
Operating Temperature
Storage Temperature
Bias Current
25V
-55°C to +125°C
-65°C to +150°C
±30mA
Note:
1. Operation of this device above any one of these
parameters may cause permanent damage.
ADVANCED:
Data Sheets contain information regarding a product M/A-COM Technology Solutions
•
North America
Tel: 800.366.2266 •
Europe
Tel: +353.21.244.6400
is considering for development. Performance is based on target specifications, simulated results,
•
India
Tel: +91.80.43537383
•
China
Tel: +86.21.2407.1588
and/or prototype measurements. Commitment to develop is not guaranteed.
Visit www.macomtech.com for additional data sheets and product information.
PRELIMINARY:
Data Sheets contain information regarding a product M/A-COM Technology
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.
MA4AGSW8-2
SP8T AlGaAs PIN Diode Switch
Rev. V2
R.F. Specifications @ T
AMB
= +25°C, -15 mA bias current, and 0 Volts
( On-wafer measurements )
MIN
-
-
-
40
35
30
10
13
17
-
PARAMETER
FREQUENCY BAND
.05 - 18 GHz
18 - 26 GHz
26 - 40 GHz
.05 - 18 GHz
18 - 26 GHz
26 - 40 GHz
.05 - 18 GHz
18 - 26 GHz
26 - 40 GHz
10 GHz
TYP
1.5
1.8
2.0
45
42
35
15
15
20
20
MAX
2.0
2.1
2.3
-
-
-
-
-
-
-
UNITS
dB
dB
dB
dB
dB
dB
dB
dB
dB
nS
Insertion Loss
Isolation
Input/Output Return Loss
Switching Speed
2
Notes:
1. Isolation is measured through (3) diodes from common port ( Input ) to selected output port with (1)
opposite port in low loss. Isolation for (2) diodes from common port ( input ) to selected output with (1)
adjacent port in low loss = 22 dB Typical.
2. Typical switching speed is measured from 10% to 90% of the detected RF voltage driven by a ± 5V TTL
compatible driver. Driver output parallel RC network uses a capacitor between 390 pF - 560 pF and a re-
sistor between 150 - 220 Ohms to achieve 20 ns rise and fall times.
D.C. Bias to RF Truth Table
Input Port
Output Ports
@ J2
@ J3
@ J4
@ J5
@ J6
@ J7
@ J8
@ J9
J1
J1
J1
J1
J1
J1
J1
J1
Notes:
Low Loss
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Low Loss
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Low Loss
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Low Loss
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Low Loss
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Low Loss
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Low Loss
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Isolation
Low Loss
1.
Low Loss
=
-15 mA
applied at the specified output port.
A DC ground return at port J1 must be provided
2.
Isolation
=
0 volts
applied at the specified output ports.
2
ADVANCED:
Data Sheets contain information regarding a product M/A-COM Technology Solutions
•
North America
Tel: 800.366.2266 •
Europe
Tel: +353.21.244.6400
is considering for development. Performance is based on target specifications, simulated results,
•
India
Tel: +91.80.43537383
•
China
Tel: +86.21.2407.1588
and/or prototype measurements. Commitment to develop is not guaranteed.
Visit www.macomtech.com for additional data sheets and product information.
PRELIMINARY:
Data Sheets contain information regarding a product M/A-COM Technology
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.
MA4AGSW8-2
SP8T AlGaAs PIN Diode Switch
Rev. V2
Typical RF Performance @ T
AMB
= +25°C
Insertion Loss
3
ADVANCED:
Data Sheets contain information regarding a product M/A-COM Technology Solutions
•
North America
Tel: 800.366.2266 •
Europe
Tel: +353.21.244.6400
is considering for development. Performance is based on target specifications, simulated results,
•
India
Tel: +91.80.43537383
•
China
Tel: +86.21.2407.1588
and/or prototype measurements. Commitment to develop is not guaranteed.
Visit www.macomtech.com for additional data sheets and product information.
PRELIMINARY:
Data Sheets contain information regarding a product M/A-COM Technology
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.
MA4AGSW8-2
SP8T AlGaAs PIN Diode Switch
Rev. V2
MA4AGSW8-2 OUTLINE
mils
min
max
64.4
65.6
A
39.2
40.4
B
30.9
31.7
C
3.8
4.2
D
11.7
12.0
E
19.5
19.9
F
27.4
27.8
G
3.7
4.3
Thickness
Bonding Pads (shown in yellow)
Dimension
100um X 100um X 5um (thick gold)
4
mm
min
max
1.64
1.00
0.78
0.10
0.30
0.50
0.70
0.09
1.67
1.03
0.80
0.11
0.31
0.51
0.71
0.11
ADVANCED:
Data Sheets contain information regarding a product M/A-COM Technology Solutions
•
North America
Tel: 800.366.2266 •
Europe
Tel: +353.21.244.6400
is considering for development. Performance is based on target specifications, simulated results,
•
India
Tel: +91.80.43537383
•
China
Tel: +86.21.2407.1588
and/or prototype measurements. Commitment to develop is not guaranteed.
Visit www.macomtech.com for additional data sheets and product information.
PRELIMINARY:
Data Sheets contain information regarding a product M/A-COM Technology
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.
MA4AGSW8-2
SP8T AlGaAs PIN Diode Switch
Rev. V2
OPERATION OF THE MA4AGSW8-2
The MA4AGSW8-2 switch is designed to operate in systems where lower D.C. current consumption and D.C. operating
voltages are required. The application of either +10 mA or –10 mA DC bias current to the selected port will provide the low
insertion loss state. Typically this low loss, “ ON ” bias voltage through (3) series diodes is | 4.5 Volts | maximum. All Isolated
Ports can be set to 0V at 0 mA, or the application of | 5 V | back bias at 0 mA will improve the isolation and switching speed.
RF to DC bias networks, ( such as the MA4BN18-40 ) are required on all RF Ports.
A simple single supply, +5V, PIN Diode TTL Gate Driver can be used to supply current for loss or 0V back bias for isolation
to switch the individual RF Ports. In this bias scheme, +5 V through a current limiting resistor would be applied at the
common port and each RF port would be connected to a TTL Gate. Low loss would occur when the Selected Gate Voltage is
0.5 V @ + 10 mA , “ TTL 0 ” and Isolation would occur when the Selected Gate Voltage is +5V @ 0mA
( 0 V Back Bias ), “ TTL 1 ”.
For faster switching speeds ( < 20 nS ) , a +/- 5V , PIN Diode TTL Driver should be employed to help remove the diode
stored charge with back bias. In this case, the common port is connected to D.C. Ground. Insertion Loss is achieved with
–10 mA @ – 4.5 V and Isolation is accomplished by applying +5V @ 0mA to the selected RF ports respectively.
5
ADVANCED:
Data Sheets contain information regarding a product M/A-COM Technology Solutions
•
North America
Tel: 800.366.2266 •
Europe
Tel: +353.21.244.6400
is considering for development. Performance is based on target specifications, simulated results,
•
India
Tel: +91.80.43537383
•
China
Tel: +86.21.2407.1588
and/or prototype measurements. Commitment to develop is not guaranteed.
Visit www.macomtech.com for additional data sheets and product information.
PRELIMINARY:
Data Sheets contain information regarding a product M/A-COM Technology
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.
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