Microsemi
Page 1
Copyright 2005
Rev. 0, 2005-07-14
WWW.Microsemi .COM
UM4000 / UM4900
HIGH POWER PIN DIODES
DESCRIPTION
The UM4000 and UM4900 series features
high power PIN diodes with long carrier
lifetimes and thick I-regions. They are
especially suitable for use in low distortion
switches and attenuators, in HF through S
band frequencies. While both series are
electrically equivalent, the UM4900 series
have higher power ratings due to a shorter
thermal path between the chip and package.
High charge storage and long carrier
lifetime enable high RF levels to be
controlled with relatively low bias current.
Similarly, peak RF voltages can be handled
well in excess of applied reverse bias voltage.
Both series have been fully qualified in high
power UHF phase shifters and megawatt peak-
power duplexers, accumulating thousands of
hours of proven performance. Both types have
been used in the design of antenna selectors and
couplers, where inductance and capacitance
elements are switched in and out of filter or
cavity networks.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
ABSOLUTE MAXIMUM RATINGS AT 25º C
(UNLESS OTHERWISE SPECIFIED)
Package
Condition
UM4000
PD θ
UM4900
PD θ
A 25 OC Pin Temperature 25 W 6 OC/W 37.5 W 4 OC/W
B & E
½ in. total length to 25 OC Contact
Free Air
12 W 12.5 OC/W
2.5 W
12 W 12.5 OC/W
2.5 W
C 25 OC Stud Temperature 25 W 6 OC/W 37.5 W 4 OC/W
D 25 OC Stud Temperature 18.75 W 8OC/W 25 W 6 OC/W
SM 25
OC End Cap Temperature 20 W 7OC/W N/A
All 1 us pulse (Single) 100 kW 100 kW
VOLTAGE RATINGS
Reverse Voltage @ 10 uA UM4000 UM4900
100 UM4001 UM4901
200 UM4002 UM4902
400 - -
600 UM4006 UM4906
1000 UM4010 -
KEY FEATURES
Voltage ratings to 1000 V
Power dissipation to 37.5 W
Series resistance rated at 0.5 Ω
Carrier lifetime greater than 5 µs
Non cavity design
Thermally matched configuration
Low capacitance at 0 V bias
Low conductance at 0 V bias
Compatible with automatic
insertion equipment
APPLICATIONS/BENEFITS
Isolated stud package available
Surface mount package available
Style “B” Style “SM”
U
UM
M4
40
00
00
0/
/U
UM
M4
49
90
00
00
0
Microsemi
Page 2
Copyright 2005
Rev. 0, 2005-07-14
WWW.Microsemi .COM
UM4000 / UM4900
HIGH POWER PIN DIODES
2001 10 100
Vr (VOLTS)
2
3
4
5
6
7
8
9
10
11
12
CAPACITANCE (pF)
UM4000/UM4900
TYPICAL
1 MHz
5 MHz
10 MHz
=>100 MHz
ELECTRICAL PARAMETERS @ 25°C (unless otherwise specified)
Parameter Symbol Conditions Min Typ. Max Units
Forward Voltage
VF
IF = 100 mA
1.0
V
Reverse Current
IR At rated voltage
10 uA
Series Resistance
RS
If = 100 mA, F= 100 MHz
0.3
0.5
Ohm
Capacitance
Parallel Resistance
Carrier Lifetime
CT
RP
τ
VR = 100 V, F = 1 MHZ
VR = 100 V, F = 100 MHz
IF = 10 mA
10k
5
2.4
15k
10
3
pF
Ohms
us
E
EL
LE
EC
CT
TR
RI
IC
CA
AL
LS
S
Microsemi
Page 3
Copyright 2005
Rev. 0, 2005-07-14
WWW.Microsemi .COM
UM4000 / UM4900
HIGH POWER PIN DIODES
F = 100 MHz
-6
10 -5
10 -4
10 -3
10 -2
10 -1
10 0
10
If (A)
-2
10
-1
10
0
10
1
10
2
10
3
10
4
10
Rs (Ohms)
UM4000/UM4900
TYPICAL
0
10 1
10 2
10 3
10
Vr (V)
0
10
1
10
2
10
3
10
Rp (KOhms)
UM4000/UM4900
TYPICAL
1 MHz 10 MHz
100 MHz
500 MHz
1 GHz
3 GHz
E
EL
LE
EC
CT
TR
RI
IC
CA
AL
LS
S
Microsemi
Page 4
Copyright 2005
Rev. 0, 2005-07-14
WWW.Microsemi .COM
UM4000 / UM4900
HIGH POWER PIN DIODES
E
EL
LE
EC
CT
TR
RI
IC
CA
AL
LS
S
Microsemi
Page 5
Copyright 2005
Rev. 0, 2005-07-14
WWW.Microsemi .COM
UM4000 / UM4900
HIGH POWER PIN DIODES
E
EL
LE
EC
CT
TR
RI
IC
CA
AL
LS
S
Microsemi
Page 6
Copyright 2005
Rev. 0, 2005-07-14
WWW.Microsemi .COM
UM4000 / UM4900
HIGH POWER PIN DIODES
E
EL
LE
EC
CT
TR
RI
IC
CA
AL
L
Microsemi
Page 7
Copyright 2005
Rev. 0, 2005-07-14
WWW.Microsemi .COM
UM4000 / UM4900
HIGH POWER PIN DIODES
-6
10 -5
10 -4
10 -3
10 -2
10 -1
10 0
10
PULSE WIDTH (SECONDS)
-3
10
-2
10
-1
10
0
10
1
10
PULSE THERMAL IMPEDANCE (DEGREES C/W)
UM4000/UM4900
TYPICAL
UM4000
UM4900
E
EL
LE
EC
CT
TR
RI
IC
CA
AL
LS
S
Microsemi
Page 8
Copyright 2005
Rev. 0, 2005-07-14
WWW.Microsemi .COM
UM4000 / UM4900
HIGH POWER PIN DIODES
UM4000 STYLE “A” UM4000 STYLE “B”
UM4000 STYLE “C” UM4000 STYLE “CR”
M
ME
EC
CH
HA
AN
NI
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CA
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Microsemi
Page 9
Copyright 2005
Rev. 0, 2005-07-14
WWW.Microsemi .COM
UM4000 / UM4900
HIGH POWER PIN DIODES
UM4000 STYLE “D” UM4000 STYLE “DR”
UM4000 STYLE “E”
M
ME
EC
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HA
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Microsemi
Page 10
Copyright 2005
Rev. 0, 2005-07-14
WWW.Microsemi .COM
UM4000 / UM4900
HIGH POWER PIN DIODES
UM4000 STYLE “SM”
UM4000 STYLE “SM” FOOTPRINT
M
ME
EC
CH
HA
AN
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Microsemi
Page 11
Copyright 2005
Rev. 0, 2005-07-14
WWW.Microsemi .COM
UM4000 / UM4900
HIGH POWER PIN DIODES
UM4900 STYLE “C” UM4900 STYLE “CR”
UM4900 STYLE “D” UM4900 STYLE “DR”
M
ME
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Microsemi
Page 12
Copyright 2005
Rev. 0, 2005-07-14
WWW.Microsemi .COM
UM4000 / UM4900
HIGH POWER PIN DIODES
NOTES:
N
NO
OT
TE
ES
S
