MRI PIN Diodes Selection Guide

MRI DEVICE SELECTOR GUIDE
Control Devices – MRI Diodes
®
MRI - APPLICATIONS MATRIX FOR RF PIN DIODES
VOLUME / BIRD CAGE COILS – Switching Diodes
(End ring resonant / anti-resonant Switching Diodes)
Model #
VBR
CT(pF)
Wi (um)
τ(µs)
Rs(Ω)@IF(mA)1
Application
HUM2015
1,500
3.5
275
20
0.1
500
Switching
HUM2020
2,000
3.5
275
20
0.1
500
Switching
SURFACE COILS – RECEIVE ARRAY PIN Diodes
(LOOP ARRAY OR STRIP ARRAY – 4 CHANNELS AND NX4 CHANNELS)
Wi
Model #
VBR
CT(pF)
τ(µs)
Rs(Ω)@IF(mA)1
(um)
Application
UMX5601
100
2.5
175
5.0
0.75
50
ULTRA-Low Magnetic
Receive Array
UM7201
100
2.2
50
1.5
0.25
100
Receive Array
UM9701
100
1.8
50
1.5
0.8
10
Receive Array
UM9995
100
1.2
100
2.0
0.6
100
Low Magnetic
Receive Array
UMX5101
100
1.2
125
2.5
0.8
50
ULTRA-Low Magnetic
Receive Array
UM9989AP 3
75
1.2
--
0.004
2.0
100
Low Magnetic
Receive Array
MPL4702 3
50
1.22
--
0.030
2.0
10
Low Magnetic
Receive Array
TRANSMIT / RECEIVE Control Boards
Model #
Rs(Ω)@IF(mA)1
VBR
CT(pF)
Wi (um)
τ(µs)
Application
UM4001
100
3.0
175
5
0.25
500
T/R Control
UM4301
100
2.2
325
6
1.5
100
T/R Control
UM7301
100
0.7
325
4
3.0
100
T/R Control
SMX0512MR
500
1.5
50
3.5
0.35
100
T/R Control
UM7101
100
1.2
100
2
0.6
100
T/R Control
UM6201
100
1.1
50
0.6
0.4
100
T/R Control
UM9415
50
3.0
175
5
0.75
50
T/R Control
RECEIVER Protection Circuits
Model #
VBR
CT(pF)
Wi (um)
τ(µs)
Rs(Ω)@IF(mA)1
UM9989
75
1.2
--
.006
2.0
100
Receiver Protection
UM1089
75
1.5
--
.015
0.8
100
Receiver Protection
UM7201
100
2.2
50
1.5
0.25
100
Receiver Protection
SMX0509MR
500
1.2
50
2.5
0.20
200
Receiver Protection
MPP4204
25
0.15
--
0.020
2.0
10
Receiver Protection
50
2
--
0.030
2.0
10
MPL4702
Notes:
1)
2)
3)
3
1.2
Application
Series Resistance (RS) is measured at 100MHz.
Nominal Ct per Diode
Anti parallel pairs
For the most current data, consult MICROSEMI’s website: www.MICROSEMI.com
Specifications are subject to change, consult the factory at (978) 442-5600 for the latest
information.
Revised
5/3/2013