UMX5101 ULTRA LOW MAGNETIC MOMENT PIN DIODE FOR MRI APPLICATIONS RoHS COMPLIANT KEY FEATURES The UMX5101 PIN diode series was designed to provide ultra low magnetic PIN diodes for in bore surface coil applications associated with higher field strength (3T and greater) MR scanners. These PIN diodes produce the minimum artifacts (magnetic field distortions) available in the industry, today. The diodes have been tested in magnetic fields of ±7 Tesla. Ultra low magnetic construction The UMX5101 PIN diodes have a magnetic moment at 7 T of 2E-8 (J/T). Thermally matched configuration The diodes are offered in a surface mount package. The SM package utilizes a square end cap to mark the cathode. The anode is round. The fully SOGO passivated PIN diode chip is full face metallurgically bonded to high conductive pins for lower thermal and electrical resistances. The PIN diodes feature low forward bias resistance and high zero bias impedance. The UMX5101 PIN diodes are characterized at 64, 128, and 300 MHz. The UMX5101 meets RoHS requirements per EU Directive 2002/95/EC. SOGO passivated chip RoHS compliant 1 Low capacitance at 0 V bias Low conductance at 0 V bias www.MICROSEMI.com DESCRIPTION Metallurgical bond Fused-in-glass construction ABSOLUTE MAXIMUM RATINGS AT 25º C (UNLESS OTHERWISE SPECIFIED) Rating Symbol Value Non cavity design Unit Compatible with automatic insertion equipment Peak Repetitive Reverse Voltage Working Peak Reverse Voltage DC Blocking Voltage VRRM VRWM VR RMS Reverse Voltage V R (RMS) 75 V Storage Temperature T stg -65 to +175 ºC Operating Temperature Non-Repetitive Peak T op -65 to +150 ºC 100 100 100 V 1- These devices are supplied with THERMAL CHARACTERISTICS AT 25º C (UNLESS OTHERWISE SPECIFIED) Thermal Resistance UMX5101SM θ Available in surface mount package. 20 IMPORTANT: Forthemostcurrentdata,consultMICROSEMI’s website: www.MICROSEMI.com Silver terminations. Other terminal finishes may be available on request. Consult factory for details. APPLICATIONS/BENEFITS ºC/Watt High B Field (3T+) in bore APPLICATIONS: Active or semi-active (not passive) MR blocking circuits MR detuning circuits MR disable circuits Copyright 2006 Rev. A, 2006-12-28 Microsemi Lowell Division 75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748 UMX 5101 MR receiver protector circuits Page 1 UMX5101 ULTRA LOW MAGNETIC MOMENT PIN DIODE FOR MRI APPLICATIONS RoHS COMPLIANT Symbol Conditions Forward Voltage (Note 1) VF IF = 100 mA Reverse Break Down Voltage VBR I R = 10 uA Reverse Current IR VR = 100 V Inductance Ls Magnetic moment m Mass Susceptibility Volume Susceptibility Capacitance Parallel Resistance χ ρ χ CT Min Typ. 0.82 Max Units 1.0 V 100 V 10 800 @ 7T 2E-8 @ 1T 5E-8 @ 7T -2.7E-11 @ 1T 1.2E-9 >1T to 7T -2.4E-7 <1 T 1.0E-5 uA pH www.MICROSEMI.com ELECTRICAL PARAMETERS @ 25 C (UNLESS OTHERWISE SPECIFIED) Parameter J/T 3 m /kg SI VR = 0 V, F = 1 MHz 2.5 3.0 VR = 100 V, F = 1 MHz 1.0 1.2 VR = 0 V, F = 64 MHz 10 30 VR = 30 V, F = 64 MHz 800 1000 RP pF kΩ Series Resistance RS If = 100 mA F = 64 MHz Lifetime τ If = 10 mA 0.8 2 2.5 1.0 Ω us E LECT RICA LS Copyright 2006 Rev. A, 2006-12-28 Microsemi Lowell Division 75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748 Page 2 UMX5101 ULTRA LOW MAGNETIC MOMENT PIN DIODE FOR MRI APPLICATIONS RoHS COMPLIANT C - V CURVES RP – PARALLEL R ESISTANCE RS VS IF www.MICROSEMI.com MAGNETIC MOMENT VS F IELD GR APHS Copyright 2006 Rev. A, 2006-12-28 Microsemi Lowell Division 75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748 Page 3 UMX5101 ULTRA LOW MAGNETIC MOMENT PIN DIODE FOR MRI APPLICATIONS RoHS COMPLIANT VF VS IF SM STYLE SOLDER FOOTPR INT www.MICROSEMI.com NOTES: 1. 2. These dimensions will match the terminals and provide for additional solder fillets at the outboard ends at least as wide as the terminals themselves, assuming accuracy of device placement within .005 inches. If the mounting method chosen requires use of an adhesive separate from the solder compound, a round (or square) spot of cement as shown should be centrally located. Dimensions shown are in inches “SM” STYLE PACKAGE O UTLINE G RA PH S /MEC HA NI C AL DIMENSIONS SHOWN ARE IN INCHES Copyright 2006 Rev. A, 2006-12-28 Microsemi Lowell Division 75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748 Page 4 UMX5101 ULTRA LOW MAGNETIC MOMENT PIN DIODE FOR MRI APPLICATIONS RoHS COMPLIANT www.MICROSEMI.com NOTES: NO TES Copyright 2006 Rev. A, 2006-12-28 Microsemi Lowell Division 75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748 Page 5