MICROSEMI UM9401

UM9401 / UM9402 / UM9415
®
TM
COMMERCIAL TWO WAY RADIO
ANTENNA SWITCH DIODES
RoHS Compliant Versions Available
KEY FEATURES
DESCRIPTION
 High transmitter power
UM9401/UM9402 => 100 W
UM9415
=> 1000 W
 Low harmonic distortion
The UM9401 and the UM9402 diodes can handle 100 W of transmitter power,
while the UM9415 will handle over 1000 W. The extensive characterization of
these PIN diodes in antenna switch applications has resulted in guaranteed
low distortion specifications under transmit and receive conditions. These
diodes also feature low forward bias resistance and high zero bias impedance
which are required for low loss, high isolation and wide bandwidth antenna
switch performance. For RoHS compliant devices, use the UMX prefix. (IE:
UMX9415)
 High carrier lifetime
The UMX series meets RoHS requirements per EU Directive 2002/95/EC.
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Microsemi offers a series of PIN diodes specifically designed and
characterized for solid state antenna switches in commercial two-way radios.
Antenna switches using the UM9401 and UM9415 series PIN diodes provide
high isolation, low loss and low distortion characteristics formerly possible
only with electromechanical relay type switches.
 Low third order distortion
 Non cavity design
 Thermally matched configuration
 Low capacitance at 0 V bias
 Low conductance at 0 V bias
 Compatible with automatic
insertion equipment
 RoHS complaint versions
available.
IMPORTANT: For the most current data, consult our website: www.MICROSEMI.com
1
 Lead finish
UM9401: Pb/Sn
UM9402: Gold
ABSOLUTE MAXIMUM RATINGS AT 25º C
(UNLESS OTHERWISE SPECIFIED)
Reverse Voltage (VR)
Average Power
Dissipation (PA)
UM9415: Pb/Sn
CONDITION
UM9401
UM9402
UM9415
@ IR = 10 uA
50V
50V
50V
½ in. total
O
length to 25 C
Contact
25 oC (Package
Flange
Temperature)
Free Air
5.5W
10W
10W
1.5W
UMX9401,UMX9415: Matte Tin
1 - The UM9402 is RoHS complaint.
RoHS compliant versions of the
UM9401 and UM9415 are supplied
as UMX9401, UMX9415. Consult
factory for details.
2.5W
o
o
Operating Temp. (TOP)
-65 C to +175 C
Storage Temp. (TSTG)
-65 oC to +175 oC
APPLICATIONS/BENEFITS
 Isolated stud package available
UM9401 / UM9402
UM9415
 Surface mount package available
 Maximum soldering temperature
o
260 C for 30 seconds.
Copyright  2007
Rev: 2009-02-05
Microsemi
Microwave Products
75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748
Page 1
UM9401 / UM9402 / UM9415
®
TM
COMMERCIAL TWO WAY RADIO
ANTENNA SWITCH DIODES
RoHS Compliant Versions Available
UM9401 / UM9402
Parameter
Symbol
Conditions
Min
Typ
Max
UM9415
Min
Typ
10
Max
Units
10
uA
Reverse Current
IR
VR = 50 V
Series Resistance
RS
IF = 50 mA, F= 100 MHz
0.75
1.0
0.75
1.0
Ω
Capacitance
CT
VR = 0 V, F = 100 MHZ
1.1
1.5
2.8
4
pF
Parallel Resistance
RP
VR = 0 V, F = 100 MHz
Carrier Lifetime
TL
IF = 10 mA
Forward Voltage
VF
IF = 50 mA
1.0
1.0
V
5
10
1
1.0
2.0
5.0
2
kΩ
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ELECTRICAL PARAMETERS @ 25C (unless otherwise specified)
us
Transmit Harmonic
Distortion
R2A/A
R3A/A
Pin = 50 W
f = 50 MHz, IF = 50 mA
80
80
-dB
Receive Third Order
Distortion
R2AB/A
Pin = 10 W, 0 V Bias
fA = 50 MHz, fB = 51 MHz
60
60
-dB
ELECTRICALS
Copyright  2007
Rev: 2009-02-05
Microsemi
Microwave Products
75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748
Page 2
UM9401 / UM9402 / UM9415
®
TM
COMMERCIAL TWO WAY RADIO
ANTENNA SWITCH DIODES
RoHS Compliant Versions Available
RS VS IF
VF VS IF
Rs versus If
TYPICAL
100
f = 100 MHz
102
10-1
UM9401/UM9402
UM9415
101
10-2
If (A)
Rs (Ohms)
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Vf versus If
TYPICAL
103
UM9415
UM9401/UM9402
10-3
100
10-4
10-1
10-5
10-4
10-3
10-2
10-1
100
10-5
If (A)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
Vf (V)
CT VS FREQUENCY
RP VS FREQUENCY
Ct versus f
TYPICAL
Rp versus f
TYPICAL
3
10
10
8
7
6
102
Vr = 0 V
Rp (kOhms)
Ct (pF)
5
4
UM9415
3
Vr = 50 V
UM9401/UM9402 Vr = 50 V
101
2
UM9415 Vr = 50 V
Vr = 0 V
UM9401/UM9402 Vr = 0 V
UM9401/UM9402
UM9415 Vr = 0 V
Vr = 50 V
1
10
100
1000
100
1
10
f (MHz)
2
10
3
10
4
10
f (MHz)
GRAPHS
Copyright  2007
Rev: 2009-02-05
Microsemi
Microwave Products
75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748
Page 3
UM9401 / UM9402 / UM9415
®
TM
COMMERCIAL TWO WAY RADIO
ANTENNA SWITCH DIODES
RoHS Compliant Versions Available
UM9401, 9402 POWER CURVE
UM9415 MAX POWER
UM9401, 9402 MAX POWER
www.MICROSEMI.com
UM9415 POWER CURVE
MAXIMUM TRANSMITTER POWER
UM9415
MAXIMUM TRANSMITTER POWER
UM9401/UM9402
Zo = 50 Ohms, L = 1/2", SWR = INFINITE
Zo = 50 Ohms, L = 1/2", SWR = INFINITE
1000
Maximum Transmitter Power (W)
Maximum Transmitter Power (W)
3000
1000
If = 1 A
If = 500 mA
100
If = 200 mA
If = 100 mA
If = 50 mA
100
If = 200 mA
If = 100 mA
If = 50 mA
10
If = 20 mA
If = 10 mA
10
25
50
75
100
125
150
175
200
1
25
50
75
100
125
150
175
200
o
Lead Temperature ( C)
o
Lead Temperature ( C)
GRAPHS
Copyright  2007
Rev: 2009-02-05
Microsemi
Microwave Products
75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748
Page 4
UM9401 / UM9402 / UM9415
®
TM
COMMERCIAL TWO WAY RADIO
ANTENNA SWITCH DIODES
RoHS Compliant Versions Available
“STYLE” UM9415B
“STYLE” UM9401SM
“STYLE” UM9415SM
www.MICROSEMI.com
“STYLE” UM9401B
MECHANICAL
Copyright  2007
Rev: 2009-02-05
Microsemi
Microwave Products
75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748
Page 5
UM9401 / UM9402 / UM9415
®
TM
COMMERCIAL TWO WAY RADIO
ANTENNA SWITCH DIODES
RoHS Compliant Versions Available
“STYLE” UM9402
www.MICROSEMI.com
UM9401SM FOOTPRINT
UM9415SM FOOTPRINT
MECHANICAL
Copyright  2007
Rev: 2009-02-05
Microsemi
Microwave Products
75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748
Page 6
UM9401 / UM9402 / UM9415
®
TM
COMMERCIAL TWO WAY RADIO
ANTENNA SWITCH DIODES
RoHS Compliant Versions Available
Maximum Transmitter Power
PT ( MAX )
P xZ    1 
 D O

RD  2 
transmit; at zero bias the receive insertion loss is less
than 0.3 dB. This performance is achievable across a ±20
% bandwidth at center frequencies ranging from 10 to 500
MHz.
2
[Watts]
DC SUPPLY
Characteristic curves are shown in the data section
which gives both the maximum and typical diode
resistance, RS as a function of forward current. The
maximum power dissipation rating of the PIN diode
depends both on the length of the diode leads and the
temperature of the contacts to which the leads are
connected. A graph defining the maximum power
dissipation at various combinations of overall lead length
(L) and lead temperature (TL) is given in the data section.
From these curves and the above equation, the power
handling capability of the PIN diode may be computed for
a specific application.
Curves are also presented which show the maximum
transmitter power that an antenna
switch using UM9401s and UM9415s can safely handle
for various forward currents and lead temperatures.
These curves are based on a typical design condition of a
½ in. total overall lead length, 50 Ω line impedance, and a
totally mismatched antenna (σ = ∞). For the case of a
perfectly matched antenna, the maximum transmitter
power can be increased by a factor of 4.
ANTENNA
/4
D1
TRANSMITTER
D2
RECEIVER
D2
RECEIVER
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The maximum CW transmitter power, PT(max), a PIN diode
antenna switch can handle depends on the diode
resistance, RS, power dissipation, PD, antennae SWR, σ,
and the nominal impedance, ZO. The expression is as
follows:
DC SUPPLY
ANTENNA
D1
L
TRANSMITTER
L = ZO / 2 fO
(H)
C = 1/2 fO ZO
(F)
L
Copyright  2007
Rev: 2009-02-05
C
C
Microsemi
Microwave Products
75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748
DESIGN
Design Information
A circuit configuration for a two-way radio antenna
switch using PIN diodes consists of a diode placed in
series with the transmitter and a shunt diode placed a
quarter wavelength from the antenna in the direction of
the receiver as shown. For low frequency operation, the
quarter wave line may be simulated by lumped elements.
Typical performance of antenna
switches using PIN diodes forward biased at 100 mA is
less than 0.2 dB insertion loss and 30 dB isolation during
Page 7