MICROSEMI UMX5101_09

UMX5101
ULTRA LOW MAGNETIC MOMENT PIN
DIODE FOR MRI APPLICATIONS
RoHS COMPLIANT
KEY FEATURES
DESCRIPTION
0B
 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
 Metallurgical bond
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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.
 Fused-in-glass construction
ABSOLUTE MAXIMUM RATINGS AT 25º C
(UNLESS OTHERWISE SPECIFIED)
Value
 Non cavity design
Rating
Symbol
Unit
Peak Repetitive Reverse Voltage
Working Peak Reverse Voltage
DC Blocking Voltage
VRRM
VRWM
VR
RMS Reverse Voltage
Storage Temperature
V R (RMS)
T stg
75
-65 to +175
V
ºC
Operating Temperature Non-Repetitive Peak
T op
-65 to +150
ºC
 Compatible with automatic
insertion equipment
100
100
100
V
THERMAL CHARACTERISTICS AT 25º C
(UNLESS OTHERWISE SPECIFIED)
Thermal Resistance
UMX5101SM
θ
 Available in surface mount
package.
20
APPLICATIONS/BENEFITS
ºC/Watt
IMPORTANT: For the most current data, consult our website: www.MICROSEMI.com
HU
1- These devices are supplied with
Silver terminations. Other terminal
finishes may be available on request.
Consult factory for details.
U
 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: 2009-01-19
Microsemi
Microwave Products
75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748
UMX5101
 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
IR = 10 uA
Reverse Current
IR
VR = 100 V
Inductance
Ls
Magnetic moment
m
Mass Susceptibility
Volume Susceptibility
χρ
χ
Min
Typ.
Max
Units
0.82
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
pH
J/T
m3/kg
SI
VR = 0 V, F = 1 MHz
2.5
3.0
VR = 100 V, F = 1 MHz
1.0
1.2
Capacitance
CT
Parallel Resistance
RP
Series Resistance
RS
If = 100 mA F = 64 MHz
Lifetime
τ
If = 10 mA
VR = 0 V, F = 64 MHz
10
30
VR = 30 V, F = 64 MHz
800
1000
0.8
2
2.5
uA
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ELECTRICAL PARAMETERS @ 25C (UNLESS OTHERWISE SPECIFIED)
Parameter
pF
kΩ
1.0
Ω
us
ELECTRICALS
Copyright  2006
Rev: 2009-01-19
Microsemi
Microwave Products
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
MAGNETIC MOMENT VS FIELD
C-V CURVES
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UMX5101SM
UMX5101
TYPICAL
TYPICAL
50
4.0
30
20
3.0
10
Ct (pF)
Magnetic moment (nJ/T)
40
0
-10
1 MHz
2.0
-20
-30
1.0
64, 128, & 300 MHz
-40
-50
-10 -9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
8
9
10
0.0
Field (T)
0
10
20
30
40
50
60
70
80
90
100
Vr (V)
RP – PARALLEL RESISTANCE
RS VS IF
UMX5101
TYPICAL
UMX5101
TYPICAL
6
10
103
64 MHz
128 MHz
300 MHz
102
Rs (Ohms)
Rp (Ohms)
105
101
104
100
103
0
5
10
15
20
25
30
35
40
45
64
128
300
MHz
10-1
50
10-2
Vr (V)
10-1
100
101
102
If (mA)
GRAPHS
Copyright  2006
Rev: 2009-01-19
Microsemi
Microwave Products
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 FOOTPRINT
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UMX5101
TYPICAL
101
100
If (A)
10-1
10-2
10-3
10-4
-5
10
10-6
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
Vf (V)
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 OUTLINE
GRAPHS/MECHANICAL
DIMENSIONS SHOWN ARE IN INCHES
Copyright  2006
Rev: 2009-01-19
Microsemi
Microwave Products
75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748
Page 4