MML4401-GM2 [MICROSEMI]
RoHS-Compliant Fast Surface Mount MRI Protection Diodes;
| 型号： | MML4401-GM2 |
| 厂家： | 
Microsemi |
| 描述： | RoHS-Compliant Fast Surface Mount MRI Protection Diodes |
| 文件： | 总17页 (文件大小：339K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MML4400 Series Datasheet
RoHS-Compliant Fast Surface Mount MRI
Protection Diodes
RoHS-Compliant Fast Surface Mount MRI Protection Diodes
Microsemi makes no warranty, representation, or guarantee regarding the information contained herein or the suitability
of its products and services for any particular purpose, nor does Microsemi assume any liability whatsoever arising out of
the application or use of any product or circuit. The products sold hereunder and any other products sold by Microsemi
have been subject to limited testing and should not be used in conjunction with mission-critical equipment or
applications. Any performance specifications are believed to be reliable but are not verified, and Buyer must conduct and
complete all performance and other testing of the products, alone and together with, or installed in, any end-products.
Buyer shall not rely on any data and performance specifications or parameters provided by Microsemi. It is the Buyer’s
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changes to the information in this document or to any products and services at any time without notice.
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About Microsemi
Microsemi Corporation (Nasdaq: MSCC) offers a comprehensive portfolio of semiconductor and system solutions for
aerospace & defense, communications, data center and industrial markets. Products include high-performance and
radiation-hardened analog mixed-signal integrated circuits, FPGAs, SoCs and ASICs; power management products; timing
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©2016 Microsemi Corporation. All rights
reserved. Microsemi and the Microsemi
logo are registered trademarks of
Microsemi Corporation. All other
trademarks and service marks are the
property of their respective owners.
MML4400 Series Datasheet Revision 1.0
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RoHS-Compliant Fast Surface Mount MRI Protection Diodes
1
Revision History
The revision history describes the changes that were implemented in the document. The changes
are listed by revision, starting with the most current publication.
1.1
Revision 1.0
Revision 1.0 was the first publication of this document.
MML4400 Series Datasheet Revision 1.0
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RoHS-Compliant Fast Surface Mount MRI Protection Diodes
Contents
1
Revision History........................................................................................................................3
1.1 Revision 1.0................................................................................................................................................ 3
2
Product Overview ....................................................................................................................7
2.1 Applications ............................................................................................................................................... 7
2.1.1
Benefits........................................................................................................................................ 7
2.2 Key Features............................................................................................................................................... 8
3
Electrical Specifications............................................................................................................9
3.1 Absolute Maximum Ratings....................................................................................................................... 9
3.2 Device Electrical Parameters...................................................................................................................... 9
3.3 Typical Rs Performance............................................................................................................................ 10
4
5
6
Package Outline......................................................................................................................11
4.1 GM2 Package Outline .............................................................................................................................. 11
4.2 GM3 Package Outline .............................................................................................................................. 13
Tape-and-Reel Format............................................................................................................15
5.1 GM2 Tape-and-Reel Format..................................................................................................................... 15
5.2 GM3 Tape-and-Reel Format..................................................................................................................... 16
Ordering Information.............................................................................................................17
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RoHS-Compliant Fast Surface Mount MRI Protection Diodes
List of Figures
Figure 1 GM2 Package Option .....................................................................................................................................7
Figure 2 GM3 Package Option .....................................................................................................................................7
Figure 3 Typical Rs Performance................................................................................................................................10
Figure 4 GM2 Package Outline...................................................................................................................................11
Figure 5 GM3 Package Outline...................................................................................................................................13
Figure 6 GM2 Tape-and-Reel Format ........................................................................................................................15
Figure 7 GM3 Tape-and-Reel Format ........................................................................................................................16
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RoHS-Compliant Fast Surface Mount MRI Protection Diodes
List of Tables
Table 1 Absolute Maximum Ratings ............................................................................................................................9
Table 2 Device Electrical Parameters...........................................................................................................................9
Table 3 GM2 Package Dimensions.............................................................................................................................12
Table 4 GM3 Package Dimensions.............................................................................................................................14
Table 5 Ordering Information ....................................................................................................................................17
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RoHS-Compliant Fast Surface Mount MRI Protection Diodes
2
Product Overview
There are two principal applications for which the MML4400 series are intended.
The first is MRI receiver protection from high-RF energy fields, including long RF pulses and RF spike
pulses present in most MRI machines. The MML4400 series acts as a passive protector (limiter) for
the MRI receiver’s low-noise amplifier (LNA). The diode assembly exhibits extremely low insertion
loss, both in the on state (high power present) and the off state (receiver power present), so that
the receiver’s noise figure is not increased by the protector circuit.
The second principal application is passive switching of surface-coil detuning and blocking circuits. In
this case, the flow of the loop current during transmitter pulses turns on the diodes, without the use
of a switch driver.
The following illustrations show the primary functional blocks of the MML4400 series devices.
Figure 1 GM2 Package Option
Figure 2 GM3 Package Option
2.1
Applications
The MML4400 series can be combined with a PIN diode (UM7201SM), and the combination can be
used to implement a semi-active detune or block circuit design. The MML4400 series devices turn on
the PIN diode (used for higher-power switching) during the sinc(x) sidelobes, before the main pulse
of the transmitter waveform (sinc(x) = [sin (x)]/x) occurs.
This surface mount limiter meets RoHS requirements according to EU directives 2011/65/EC and
2002/95 EC.
2.1.1
Benefits
The MML4400 series devices provide the following application benefits:
•
MRI passive receiver protection
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RoHS-Compliant Fast Surface Mount MRI Protection Diodes
•
•
•
MRI passive blocking circuits
MRI passive detuning circuits
MRI passive disable circuits
2.2
Key Features
The following are key features of the MML4400 series devices:
•
•
•
•
•
•
•
•
Designed for MRI applications
Anti-parallel (unconnected pairs) option available with GM3 package
Low capacitance at 0 V bias: 1.5 pF maximum
Low conductance at 0 V bias: 40 µs maximum at F = 64 MHz
Low magnetic construction surface mount package
RoHS compliant and 260 °C reflow compatible
Passivated chip
Compatible with automatic insertion equipment
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3
Electrical Specifications
3.1
Absolute Maximum Ratings
The following table shows the absolute maximum ratings at 25 °C unless otherwise specified.
Table 1 Absolute Maximum Ratings
Rating
Symbol
Value
Unit
Maximum leakage current
(at 80% of minimum-rated VB)
IR
0.5
μA
Operating temperature
Storage temperature
ESD sensitivity (HBM)
Moisture sensitivity level
TOP
–55 to 150
–65 to 150
Class 1A
MSL 1
°C
°C
TSTG
3.2
Device Electrical Parameters
The following table shows the device electrical parameters at 25 °C. Specifications for the GM3
configurations are based on a single diode in anti-parallel topology.
Table 2 Device Electrical Parameters
Vb
CT0
RS
TL
Conductance
(G)
θP
IR = 10 μA
(Min)
at 0 V
(Max)
at 100 mA
f = 100 MHz
(Max)
(Typ)
Thermal
Resistance
(Max)
Model Number
Vr = 0 V
F = 64 MHz
(Max)
MML4401-GM2
MML4401-GM3
MML4402-GM2
MML4402-GM3
MML4403-GM2
MML4403-GM3
75 V
75 V
75 V
75 V
75 V
75 V
1.5 pF
1.5 pF
2.0 pF
2.0 pF
1.5 pF
1.5 pF
2.5 Ω
2.5 Ω
1.5 Ω
1.5 Ω
1.0 Ω
1.0 Ω
10 ns
10 ns
20 ns
20 ns
30 ns
30 ns
40 μs
40 μs
40 μs
40 μs
40 μs
40 μs
20 ˚C/W
20 ˚C/W
20 ˚C/W
20 ˚C/W
30 ˚C/W
30 ˚C/W
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RoHS-Compliant Fast Surface Mount MRI Protection Diodes
3.3
Typical Rs Performance
The following graph shows the typical Rs performance of the MML4400 series devices, where
f = 100 MHz.
Figure 3 Typical Rs Performance
TYPICAL Rs vs. FORWARD CURRENT
10000
1000
100
MML4401
Rs
MML4402
MML4403
(Ohms)
10
1
0.1
0.001
0.01
0.1
1
10
100
If (mA)
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4
Package Outline
4.1
GM2 Package Outline
The following illustration shows the GM2 package outline of the MML4400 series devices.
Figure 4 GM2 Package Outline
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RoHS-Compliant Fast Surface Mount MRI Protection Diodes
The following table shows the GM2 package dimensions of the MML4400 series devices.
Table 3 GM2 Package Dimensions
DIM
Inches
Min
Millimeters
Min
Typ
Max
Typ
Max
A
B
C
D
E
0.045
0.075
0.030
0.050
0.080
0.035
0.055
0.085
0.040
0.003
1.143
1.270
2.032
0.889
1.397
2.159
1.016
0.076
1.905
0.762
0.046
0.044
0.011
0.006
1.168
1.118
0.279
0.152
F
G
H
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RoHS-Compliant Fast Surface Mount MRI Protection Diodes
4.2
GM3 Package Outline
The following illustration shows the GM3 package outline of the MML4400 series devices.
Figure 5 GM3 Package Outline
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RoHS-Compliant Fast Surface Mount MRI Protection Diodes
The following table shows the GM3 package dimensions of the MML4400 series devices.
Table 4 GM3 Package Dimensions
DIM
Inches
Min
Millimeters
Min
Typ
Max
Typ
Max
A
B
C
D
E
F
0.094
0.093
0.030
0.099
0.098
0.035
0.104
0.103
0.040
0.003
2.388
2.515
2.489
0.889
2.642
2.616
1.016
0.076
2.362
0.762
0.085
0.084
0.050
0.0120
0.025
0.035
0.014
2.159
2.134
1.270
0.254
0.635
0.889
0.356
G
H
J
K
L
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RoHS-Compliant Fast Surface Mount MRI Protection Diodes
5
Tape-and-Reel Format
5.1
GM2 Tape-and-Reel Format
The following illustration shows the GM2 tape-and-reel format of the MML4400 series devices in
inches and millimeters.
Figure 6 GM2 Tape-and-Reel Format
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RoHS-Compliant Fast Surface Mount MRI Protection Diodes
5.2
GM3 Tape-and-Reel Format
The following illustration shows the GM3 tape-and-reel format of the MML4400 series devices in
inches and millimeters.
Figure 7 GM3 Tape-and-Reel Format
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Ordering Information
The following table shows the ordering information for the MML4400 series devices.
Table 5 Ordering Information
Part Number
Package
GM2
MML4401-GM2
MML4401-GM3
MML4402-GM2
MML4402-GM3
MML4403-GM2
MML4403-GM3
GM3
GM2
GM3
GM2
GM3
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