MML4403-GM3

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Document overview

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• PDF pages: 17

Technical content

Datasheet sections

• 1 Revision History
• 2 Product Overview
• 2.1 Applications
• 2.1.1 Benefits
• 2.2 Key Features
• 3 Electrical Specifications
• 3.1 Absolute Maximum Ratings
• 3.2 Device Electrical Parameters
• 3.3 Typical Rs Performance
• 4 Package Outline
• 4.1 GM2 Package Outline
• 4.2 GM3 Package Outline
• 5 Tape-and-Reel Format
• 5.1 GM2 Tape-and-Reel Format
• 5.2 GM3 Tape-and-Reel Format
• 6 Ordering Information

RoHS-Compliant Fast Surface Mount MRI Protection Diodes

RoHS-Compliant Fast Surface Mount MRI Protection Diodes MML4400 Series Datasheet Revision 1.0 2 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 responsibility to independently determine suitability of any products and to test and verify the same. The information provided by Microsemi hereunder is provided “as is, where is” and with all faults, and the entire risk associated with such information is entirely with the Buyer. Microsemi does not grant, explicitly or implicitly, to any party any patent rights, licenses, or any other IP rights, whether with regard to such information itself or anything described by such information. Information provided in this document is proprietary to Microsemi, and Microsemi reserves the right to make any changes to the information in this document or to any products and services at any time without notice. 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 and synchronization devices and precise time solutions, setting the world's standard for time; voice processing devices; RF solutions; discrete components; enterprise storage and communication solutions; security technologies and scalable anti- tamper products; Ethernet solutions; Power-over-Ethernet ICs and midspans; as well as custom design capabilities and services. Microsemi is headquartered in Aliso Viejo, California, and has approximately 4,800 employees globally. Learn more at www.microsemi.com. Microsemi Corporate Headquarters One Enterprise, Aliso Viejo, CA 92656 USA Within the USA: +1 (800) 713-4113 Outside the USA: +1 (949) 380-6100 Fax: +1 (949) 215-4996 Email: sales.support@microsemi.com www.microsemi.com ©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.

RoHS-Compliant Fast Surface Mount MRI Protection Diodes MML4400 Series Datasheet Revision 1.0 3

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.

RoHS-Compliant Fast Surface Mount MRI Protection Diodes MML4400 Series Datasheet Revision 1.0 6 List of Tables

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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 protecto r (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

RoHS-Compliant Fast Surface Mount MRI Protection Diodes MML4400 Series Datasheet Revision 1.0 8

• 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

RoHS-Compliant Fast Surface Mount MRI Protection Diodes MML4400 Series Datasheet Revision 1.0 9

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 TOP –55 to 150 °C Storage temperature TSTG –65 to 150 °C ESD sensitivity (HBM) Class 1A Moisture sensitivity level MSL 1

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 Model Number Vb IR = 10 μA (Min) CT0 at 0 V (Max) RS at 100 mA f = 100 MHz (Max) TL (Typ) Conductance (G) Vr = 0 V F = 64 MHz (Max) θP Thermal Resistance (Max) MML4401-GM2 75 V 1.5 pF 2.5 Ω 10 ns 40 μs 20 ˚C/W MML4401-GM3 75 V 1.5 pF 2.5 Ω 10 ns 40 μs 20 ˚C/W MML4402-GM2 75 V 2.0 pF 1.5 Ω 20 ns 40 μs 20 ˚C/W MML4402-GM3 75 V 2.0 pF 1.5 Ω 20 ns 40 μs 20 ˚C/W MML4403-GM2 75 V 1.5 pF 1.0 Ω 30 ns 40 μs 30 ˚C/W MML4403-GM3 75 V 1.5 pF 1.0 Ω 30 ns 40 μs 30 ˚C/W

RoHS-Compliant Fast Surface Mount MRI Protection Diodes MML4400 Series Datasheet Revision 1.0 10

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 0.1 100 1000 10000 0.001 0.01 0.1 1 10 100 Rs (Ohms) If (mA) MML4401 MML4402 MML4403 TYPICAL Rs vs. FORWARD CURRENT

RoHS-Compliant Fast Surface Mount MRI Protection Diodes MML4400 Series Datasheet Revision 1.0 11

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

RoHS-Compliant Fast Surface Mount MRI Protection Diodes MML4400 Series Datasheet Revision 1.0 12 The following table shows the GM2 package dimensions of the MML4400 series devices. Table 3 GM2 Package Dimensions DIM Inches Millimeters Min Typ Max Min Typ Max D 0.003 0.076 E 0.046 1.168 F 0.044 1.118 G 0.011 0.279 H 0.006 0.152

RoHS-Compliant Fast Surface Mount MRI Protection Diodes MML4400 Series Datasheet Revision 1.0 13

4.2 GM3 Package Outline

The following illustration shows the GM3 package outline of the MML4400 series devices. Figure 5 GM3 Package Outline

RoHS-Compliant Fast Surface Mount MRI Protection Diodes MML4400 Series Datasheet Revision 1.0 14 The following table shows the GM3 package dimensions of the MML4400 ser ies devices. Table 4 GM3 Package Dimensions DIM Inches Millimeters Min Typ Max Min Typ Max D 0.003 0.076 E 0.085 2.159 F 0.084 2.134 G 0.050 1.270 H 0.0120 0.254 J 0.025 0.635 K 0.035 0.889 L 0.014 0.356

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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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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

RoHS-Compliant Fast Surface Mount MRI Protection Diodes MML4400 Series Datasheet Revision 1.0 17

6 Ordering Information

The following table shows the ordering information for the MML4400 series devices. Table 5 Ordering Information Part Number Package MML4401-GM2 GM2 MML4401-GM3 GM3 MML4402-GM2 GM2 MML4402-GM3 GM3 MML4403-GM2 GM2 MML4403-GM3 GM3