UMX5101
ULTRA LOW MAGNETIC MOMENT PIN
DIODE FOR MRI APPLICATIONS
RoHS COMPLIANT
KEY FEATURES
DESCRIPTION
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
. SOGO passivated chip
. Thermally matched configuration
. RoHS compliant 1
The UMX5101 PIN diodes have a magnetic moment at 7 T of 2E-8
(J/T).
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.
. Low capacitance at 0 V bias
. Low conductance at 0 V bias
. Metallurgical bond
. Fused-in-glass construction
. Non cavity design
ABSOLUTE MAXIMUM RATINGS AT 25º C
(UNLESS OTHERWISE SPECIFIED)
. Available in surface mount
package.
Rating
Symbol
Value
Unit
. Compatible with automatic
insertion equipment
Peak Repetitive Reverse Voltage
Working Peak Reverse Voltage
DC Blocking Voltage
VRRM
VRWM
VR
100
100
100
V
1- These devices are supplied with
Silver terminations. Other terminal
finishes may be available on request.
Consult factory for details.
RMS Reverse Voltage
Storage Temperature
V R (RMS)
T stg
75
V
-65 to +175
-65 to +150
ºC
ºC
Operating Temperature Non-Repetitive Peak
T op
THERMAL CHARACTERISTICS AT 25º C
(UNLESS OTHERWISE SPECIFIED)
Thermal Resistance
APPLICATIONS/BENEFITS
. High B Field (3T+) in bore
APPLICATIONS:
UMX5101SM
θ
20
ºC/Watt
. Active or semi-active
(not passive)
IMPORTANT: For the most current data, consult our website: www.MICROSEMI.com
. MR blocking circuits
. MR detuning circuits
. MR disable circuits
. MR receiver protector circuits
Copyright 2006
Rev: 2009-01-19
Microsemi
Page 1
Microwave Products
75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748