technology, produce less diode “On” resistance than
conventional GaAs or silicon devices. This device is
fabricated in a OMCVD system using a process
optimized for high device uniformity and extremely
low parasitics. The result is a diode with low series
resistance, 4Ω, low capacitance, 28fF, and an
extremely fast switching speed of 5nS. It is fully
passivated with silicon nitride and has an additional
polymer coating for scratch protection. The
protective coating prevents damage to the junction
and the anode air bridges during handling and as-
sembly.
Bottom
Absolute Maximum Ratings @ T
AMB
= 25°C
(unless otherwise specified)
Parameter
Reverse Voltage
Operating Temperature
Storage Temperature
Junction Temperature
Absolute Maximum
-50V
-65°C to +125°C
-65°C to +150°C
+175°C
Applications
The ultra low capacitance of the MA4AGBLP912
device makes it ideally suited for use up to 40GHz
when used in a shunt configuration. The low RC
product and low profile of the beamlead PIN diode
allows for use in microwave switch designs, where
low insertion loss and high isolation are required.
The operating bias conditions of +10mA for the low
loss state, and 0V, for the isolation state permits the
use of a simple +5V TTL gate driver. AlGaAs,
beamlead diodes, can be used in switching arrays
on radar systems, high speed ECM circuits, optical
switching networks, instrumentation, and other
wideband multi-throw switch assemblies
.
Forward DC Current
C.W. Incident Power
Mounting Temperature
40mA
+23dBm
+235°C for 10 seconds
1
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MA4AGBL912
AlGaAs Beamlead PIN Diode
Rev. V5
Electrical Specifications at T
AMB
= 25°C
Test Conditions
Total Capacitance @ –5V/1 MHz
Forward Resistance @ +20mA/1 GHz
Forward Voltage at +10mA
Leakage Current at –40 V
Minority Carrier Lifetime
Parameters
Ct
Rs
Vf
Ir
TL
Units
fF
Ohms
Volts
nA
nS
Min
–
–
1.2
–
–
Typical
26
4
1.36
50
5
Max.
30
4.9
1.5
300
10
DIM
A
B
C
D
E
F
2
INCHES
MIN.
0.009
0.0049
0.0037
0.0049
0.002
0.0218
MAX.
0.013
0.0089
0.0057
0.0089
0.006
0.0278
MIN.
0.2286
0.1245
0.0940
0.1245
0.0508
0.5537
MM
MAX.
0.3302
0.2261
0.1448
0.2261
0.1524
0.70612
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MA4AGBL912
AlGaAs Beamlead PIN Diode
Rev. V5
Diode Model
Rs
Ls = 0.5
Ct
MA4AGBLP912 SPICE Model
wBv= 50 V
e-
= 8600 cm^2/V-sec wPmax= 100 mW
Ffe= 1.0
Wi= 3.0 um
Rr= 10 K Ohms
Cjmin= 0.020 pF
Tau= 10 nsec
Rs(I)= Rc + Rj(I) = 0.10 Ohm + Rj(I)
Cj0= 0.022 pF
Vj= 1.35 V
M= 0.5
Fc= 0.5
Imax= 0.04 A
Kf= 0.0
Af=1.0
3
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Is=1.0E-14 A
Vi=0.0 V
MA4AGBL912
AlGaAs Beamlead PIN Diode
Rev. V5
Handling and Assembly Procedures
The following precautions should be observed to avoid damaging these devices.
Cleanliness
These devices should be handled in a clean environment.
Static Sensitivity
Aluminum Gallium Arsenide PIN diodes are Class 0, HBM, ESD sensitive and can be damaged by
static electricity. Proper ESD techniques should be used when handling these devices.
General Handling
These devices have a polymer layer which provides scratch protection for the junction area and the
anode air bridge. Beam lead devices must, however, be handled with extreme care since the leads
may easily be distorted or broken by the normal pressures exerted when handled with tweezers. A
vacuum pencil with a #27 tip is recommended for picking and placing.
Attachment
These devices were designed to be inserted onto hard or soft substrates. Recommended methods
of attachment include thermo-compression bonding, parallel-gap welding and electrically conductive
silver epoxy.
Ordering Information
Part Number
MA4AGBLP912
Packaging
Gel Pak
4
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Visit
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for additional data sheets and product information.
For further information and support please visit:
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MA4AGBL912
AlGaAs Beamlead PIN Diode
Rev. V5
M/A-COM Technology Solutions Inc. All rights reserved.
Information in this document is provided in connection with M/A-COM Technology Solutions Inc ("MACOM")
products. These materials are provided by MACOM as a service to its customers and may be used for
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in any separate agreement related to this document, MACOM assumes no liability whatsoever. MACOM
assumes no responsibility for errors or omissions in these materials. MACOM may make changes to
specifications and product descriptions at any time, without notice. MACOM makes no commitment to update
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5
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit
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for additional data sheets and product information.