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AlGaAs SP5T Reflective PIN Diode Switch
V 1.00
MA4AGSW5
Features
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MA4AGSW5 Layout
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Ultra Broad Bandwidth: 50 MHz to 50 GHz 1.7 dB Insertion Loss, 30 dB Isolation at 50 GHz Low Current comsumption. -10 mA for low loss state +10 mA for Isolation state M/A-COM's unique patent pending AlGaAs hetero-junction anode technology. Silicon Nitride Passivation Polyamide Scratch protection
Description
M/A-COM's MA4AGSW5 is an Aluminum-Gallium- Arsenide anode enhanced, SP5T PIN diode switch. AlGaAs anodes, which utilize M/A-COM's patent pending hetero-junction technology, produce less loss than conventional GaAs processes, by as much as 0.3 dB reduction in insertion loss at 50 GHz. These devices are fabricated on a OMCVD epitaxial wafer using a process designed for high device uniformity and extremely low parasitics. The diodes themselves exhibit low series resistance, low capacitance, and fast switching speed. They are fully passivated with silicon nitride and have an additional layer of a polymer for scratch protection. The protective coating prevents damage to the junction and the anode air bridges during handling. Off-chip bias circuitry is required and allows maximum design flexibility.
Absolute Maximum Ratings1 @ T= Room Temp. (Unless otherwise specified)
Parameter Operating Temperature Storage Temperature RF C.W. Incident Power Breakdown Voltage Bias Current Maximum Rating -55 C to +125 C -65 C to +150 C + 23 dBm C. W. 25 V +/- 30 mA per Diode
Applications
The low capacitance of the PIN diodes makes this device ideal for use in microwave multi-throw switch designs. The low series resistance of the diodes reduces the insertion loss of the devices at microwave/millimeter-wave frequencies. These AlGaAs PIN switches are used as switching arrays on radar systems, optical switching networks, instrumentation, and other wideband multi-throw switch assemblies.
1. Exceeding any of these values may result in permanent damage
AlGaAs SP5T Reflective PIN Diode Switch Electrical Specifications @ 25 C (On-Wafer Measurements)
RF Parameter
Insertion Loss
MA4AGSW5
V 1.00
Frequency Band
0.05 - 18 GHz 18 - 50 GHz 0.05 - 18 GHz 18 - 50 GHz 0.05 - 18 GHz 18 - 50 GHz 0.05 - 18 GHz 18 - 50 GHz 0.05 - 18 GHz 18 - 50 GHz 0.05 - 18 GHz 18 - 50 GHz 0.05 - 18 GHz 18 - 50 GHz 0.05 - 18 GHz 18 - 50 GHz 0.05 - 18 GHz 18 - 50 GHz 0.05 - 18 GHz 18 - 50 GHz 0.05 - 18 GHz 18 - 50 GHz 0.05 - 18 GHz 18 - 50 GHz 0.05 - 18 GHz 18 - 50 GHz 0.05 - 18 GHz 18 - 50 GHz 0.05 - 18 GHz 18 - 50 GHz
Port
J2 to J1 J2 to J1 J3 to J1 J3 to J1 J4 to J1 J4 to J1 J5 to J1 J5 to J1 J6 to J1 J6 to J1 J2 to J1 J2 to J1 J3 to J1 J3 to J1 J4 to J1 J4 to J1 J5 to J1 J5 to J1 J6 to J1 J6 to J1 J2 to J1 J2 to J1 J3 to J1 J3 to J1 J4 to J1 J4 to J1 J5 to J1 J5 to J1 J6 to J1 J6 to J1
Bias
-10 mA @ J2, +10 mA @ J3, J4, J5, J6 -10 mA @ J3, +10 mA @ J2, J4, J5, J6 -10 mA @ J4, +10 mA @ J2, J3, J5, J6 -10 mA @ J5, +10 mA @ J2, J3, J4, J6 -10 mA @ J6, +10 mA @ J2, J3, J4, J5 -10 mA @ J6, +10 mA @ J3, J4, J5, J2 -10 mA @ J6, +10 mA @ J2, J4, J5, J2 -10 mA @ J6, +10 mA @ J2, J3, J5, J2 -10 mA @ J6, +10 mA @ J2, J3, J4, J2 -10 mA @ J2, +10 mA @ J2, J3, J4, J6 -10 mA @ J2, +10 mA @ J3, J4, J5, J6 -10 mA @ J3, +10 mA @ J2, J4, J5, J6 -10 mA @ J4, +10 mA @ J2, J3, J5, J6 -10 mA @ J5, +10 mA @ J2, J3, J4, J6 -10 mA @ J6, +10 mA @ J2, J3, J4, J5
Min
35.0 30.0 35.0 30.0 35.0 30.0 35.0 30.0 35.0 30.0 12.0 12.0 12.0 12.0 12.0 12.0 12.0 12.0 12.0 12.0
Max
1.4 1.9 1.4 1.9 1.4 1.9 1.4 1.9 1.4 1.9 -
Units
dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB
Isolation
In/Out Return Loss
Parameter
Switching Speed (10-90%) RF Voltage)
F (GHz)
10.0
RF Ports
J1 to J2, J3, J4, J5, J6
Test Conditions
+/-5 V TTL Compatible PIN Diode Driver
Typ Value
15
Units
nS
NOTES: 1. Isolation is measured through (3) Diodes from Common Port ( Input ) to Selected Output Port with (1) Opposite Series Junction Diode in Low Loss. Isolation for (2) Diodes from Common Port ( Input ) to Selected Output with the Same Series Junction Diode 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 resistor between 150 - 220 Ohms to achieve 15 ns rise and fall times.
2 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information.
n North America: Tel. (800) 366-2266 n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 n Europe: Tel. +44 (1908) 574 200, Fax+44 (1908) 574 300
AlGaAs SP5T Reflective PIN Diode Switch Microwave Performance
Typical Insertion Loss @ 25 C (On Wafer Measurements)
0.0 -0.5 -1.0 -1.5
MA4AGSW5
V 1.00
Loss ( dB )
-2.0 -2.5 -3.0 -3.5 -4.0 -4.5 -5.0 0 5 10 15 20 25 30 35 40 45 50
Freq ( GHz )
Typical Input Return Loss @ 25 C (On Wafer Measurements)
0 -5 -10 R.L. ( dB ) -15 -20 -25 -30 0 5 10 15 20 25 30 35 40 45 50
Freq ( GHz )
3 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information.
n North America: Tel. (800) 366-2266 n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 n Europe: Tel. +44 (1908) 574 200, Fax+44 (1908) 574 300
AlGaAs SP5T Reflective PIN Diode Switch Microwave Performance
Typical Output Return Loss @ 25 C (On Wafer Measurements)
MA4AGSW5
V 1.00
0 -5 -1 0
R.L. ( dB )
-1 5 -2 0 -2 5 -3 0 0 5 10 15 20 25 30 35 40 45 50
F ( GHz )
Typical Isolation @ 25 C (On Wafer Measurements)
0 -10 -20 -30
Isolation ( dB )
-40 -50 -60 -70 0 5 10 15 20 25 30 35 40 45 50
F ( GHz )
4 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information.
n North America: Tel. (800) 366-2266 n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 n Europe: Tel. +44 (1908) 574 200, Fax+44 (1908) 574 300
AlGaAs SP5T Reflective PIN Diode Switch Chip Dimensions (mm and mils)
MA4AGSW5
V 1.00
mm
mils
Dim A B C D E F G Thickness
Min. 1.53 1.61 0.76 0.39 0.82 0.16 0.65 0.09
Max. 1.56 1.64 0.79 0.41 0.84 0.18 0.67 0.11
Min. 60.0 63.2 29.7 15.2 32.2 6.5 25.7 3.7
Max. 61.2 64.4 30.9 16.0 33.0 7.2 26.5 4.3
5 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information.
n North America: Tel. (800) 366-2266 n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 n Europe: Tel. +44 (1908) 574 200, Fax+44 (1908) 574 300
AlGaAs SP5T Reflective PIN Diode Switch Handling Procedures
The following precautions should be observed to avoid damaging these chips.
MA4AGSW5
V 1.00
Solder Die Attachment
All die attach and bonding methods should be compatible with gold metal. Solder which does not scavange go ld, such as 80Au/20Sn or Indalloy #2 is recommended. Do not expose die to a temperature greater than 300 C for more than 10 seconds.
Cleanliness
These chips should be handled in a clean environment. Do not attempt to clean die after installation.
Electrical Conductive Epoxy Die Attachment
Assembly can be preheated to approximately 125 C. Use a controlled thickness of approximately 2 mils for best electrical and thermal conductivity. Cure epoxy as per manufacturer's schedule. For extended cure times, temperatures should be kept below 150 C.
Static Sensitivity
Proper ESD techniques should be used when handling these devices.
General Handling
The protective polymer coating on the active areas of these die provides scratch and impact protection, particularly for the metal air bridge which contacts the diode's anode. Die should primarily be handled with vacuum pickups, or alternatively with plastic tweezers.
Ribbon/Wire Bonding
Wedge thermo compression bonding or ball bonding may be used to attach ribbons to the bonding pads. Gold ribbons should be 1/4 x 3 mil sq. for all RF ports (J1-J6) for lowest inductance and best microwave performance.
Mounting Techniques
These AlGaAs devices are designed to be mounted with electrically conductive silver epoxy or with a lower temperature solder perform.
Operation of the MA4AGSW5 Switch
The Simultaneous Application of Negative D.C. Current to the Low Loss Port and Positive DC current to the Remaining Isolated Switching Ports provides operation of the MA4AGSW Series of AlGaAs PIN Switches. The Backside Area of the Die is the RF and DC Return Ground Plane. The DC Return is achieved on Common Port J1. Constant Current Sources should supply the DC Control Currents. The individual Diode Voltages in the circuit are typically < | 1.5 V | up to + 30 mA . In the Low Loss State, the Series Diodes must be Forward Biased and the Shunt Diode Reverse Biased. For All the Isolated Ports, the Shunt Diode is Forward Biased and the Series Diode is Reverse Biased. RF to D.C. bias networks are required, such as the MA4BN1840-1. The Bias Network Design should yield > 30 dB RF to DC Isolation in the operating frequency band. Best Insertion Loss, P1dB, IP3, and Switching Speed is Achieved by using a Voltage Pull-up Resistor in the DC Return Path, ( J1 ). A Minimum Value of | -3.5V | is recommended at this Return Node, which is achievable with a Standard , +/-5 V TTL Controlled PIN Diode Driver.
6 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information.
n North America: Tel. (800) 366-2266 n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 n Europe: Tel. +44 (1908) 574 200, Fax+44 (1908) 574 300
AlGaAs SP5T Reflective PIN Diode Switch MA4AGSW5 Schematic
MA4AGSW5
V 1.00
J3
J4
J5
J2
J1 ( Common )
J6
7 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information.
n North America: Tel. (800) 366-2266 n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 n Europe: Tel. +44 (1908) 574 200, Fax+44 (1908) 574 300

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