Alpha Industries, Inc. [781] 935-5150 •Fax [617] 824-4579 •Email sales@alphaind.com •www.alphaind.com 1
Specifications subject to change without notice. 1/01A
Low Distor tion Attenuator
Plastic Packaged PIN Diodes
Features
■Low Distor tion Design
■Frequency Range from HF to > 2 GHz
■Designed for Base Station Applications
■Configured for PI and TEE Attenuators
Description
The SMP1304 series of plastic packaged, surface
mountable, low capacitance (0.3 pF) silicon PIN diodes
are designed f or use in attenuator applications from 5 MHz
to bey ond 2 GHz.The thick 100 µm I region of these PIN
diodes makes them v ery attractiv e f or use in low distortion
PI and TEE attenuators commonly used in TV distribution
applications. The 1 µS typical carrier lifetime of these
diodes results in resistance of 20 Ωmaximum at 1 mA and
7 Ωmaximum at 10 mA.A v ailable in a selection of plastic
packages: as a single diode in the small footprint
SOD-323 package and in a v ariety of configurations in the
SOT-23 package, including a low inductance (0.4 nH)
SMP1304-007 package. Also available in the SOT-143
package are three diode junctions designed f or insertion
in TEE attenuators (SMP1304-018) and PI attenuators
(SMP1304-019).Also a vailab le in a SO T-5 (SMP1304-027)
package as a f our diode arra y designed f or insertion in the
commonly used 4 diode PI attenuator circuit.
SMP1304 Series
Characteristic Value
Reverse Voltage (VR) 200 V
Power Dissipation @ 25°C Lead 250 mW
Temperature (PD)
Storage Temperature (TST) -65°C to +150°C
Operating Temperature (TOP) -65°C to +150°C
ESD Human Body Model Class 1C
Absolute Maximum Ratings
♦Available through distribution.
Single Common Series Pair Low Single PI PI
Cathode Inductance
Marking: PG1 Marking: PG3 Marking: PG2 Marking: PGB Marking: PGJ Marking: PGM
SOT-23 SOT-23 SOT-23 SOT-23 SOD-323 SOT-143 SOT-5
♦SMP1304-001 ♦SMP1304-004 ♦SMP1304-005 ♦SMP1304-007 ♦SMP1304-011 ♦SMP1304-019 ♦SMP1304-027
LS= 1.5 nH LS= 1.5 nH LS= 1.5 nH LS= 0.4 nH LS= 1.5 nH
♦Available through distribution.
2Alpha Industries, Inc. [781] 935-5150 •Fax [617] 824-4579 •Email sales@alphaind.com •www.alphaind.com
Specifications subject to change without notice. 1/01A
Low Distortion Attenuator Plastic Packaged PIN Diodes SMP1304 Series
Series Resistance vs. Current @ 100 MHz
0.01 0.1 1 10 100
Forward Current (mA)
Series Resistance (Ω)
0.1
1
10
100
1000
10000
01251020 10050
Capacitance vs. Reverse Voltage
0
0.2
0.4
0.6
0.1
0.3
0.5
0.7
0.8
Reverse Voltage (V)
Capacitance (pF)
100 MHz
1 MHz
1 GHz
400 500 600 700 800 900 1000
DC Characteristic
0.01
0.1
1
10
100
Forward Voltage (mV)
Forward Current (mA)
.
0 500 1000 1500 2000
Conductance vs. Frequency
and Reverse Voltage
Frequency (MHz)
Conductance (µS)
0
50
100
150
200
250
300
350
400
0 V
10 V
40 V
Typical Performance Data
Parameter Condition Typ. Max. Unit
Reverse Current (IR)V
R= 200 V 10 µA
Capacitance (CT) F = 1 MHz, V = 30 V 0.30 pF
Capacitance (CT) F = 1 MHz, V = 30 V 0.45 pF
(SMP1304-018 & SMP1304-019)
Resistance (RS) F = 100 MHz, I = 1 mA 40 50 Ω
Resistance (RS) F = 100 MHz, I = 10 mA 7.0 Ω
Resistance (RS) F = 100 MHz, I = 100 mA 2.0 Ω
Forw ard Voltage (VF) IF = 10 mA 0.8 V
Carrier Lifetime (TI) IF = 10 mA 1.0 µS
I Region Width 100 µm
Electrical Specifications at 25°C
Low Distortion Attenuator Plastic Packaged PIN Diodes SMP1304 Series
Alpha Industries, Inc. [781] 935-5150 •Fax [617] 824-4579 •Email sales@alphaind.com •www.alphaind.com 3
Specifications subject to change without notice. 1/01A
4
31
2
43
12
SMP1304-019 (PI)
SMP1304-007
In the -007 configuration of the SOT-23 package, the
package inductance is effectively reduced to 0.4 nH, in
comparison to the 1.5 nH value of the standard
configuration. This lower inductance will be particularly
beneficial when the diodes are used as shunt connected
switches at frequencies higher than 500 MHz, where
inductance is the primary limitation on maximum switch
isolation.
To achiev e the eff ective 0.4 nH, the SO T-23 package m ust
be inserted in the microstrip circuit board with a gap in the
trace, as shown in the figure. Because of the polarity of
the diode junction, this low inductance feature is only
realizable with the cathode connected to ground.
SMP1304-019 PI Attenuator PIN Diodes
The SMP1304-019 employ three PIN diode junctions in
a SOT-143 package. They are configured for ease of
insertion in PI attenuator circuits commonly used from 10
MHz to bey ond 1 GHz.The SMP1304 PIN diode junction
was designed for low capacitance, wide resistance
dynamic range and low distortion performance.
RRRRR
IF-55°C -15°C +25°C +65°C +100°C
(mA) (ΩΩ)(
ΩΩ)(
ΩΩ)(
ΩΩ)(
ΩΩ)
0.02 1590.0 1660.0 1752.0 1770.0 1760.0
0.10 315.0 340.0 367.0 396.0 409.0
0.30 108.0 118.0 128.0 141.0 147.0
1.00 34.5 37.9 41.6 46.3 48.8
10.00 4.8 5.3 5.8 6.6 7.0
20.00 3.0 3.3 3.6 4.1 4.3
100.00 1.3 1.4 1.5 1.7 1.8
Resistance vs. Temperature @ 100 MHz
Ground
Gap
4Alpha Industries, Inc. [781] 935-5150 •Fax [617] 824-4579 •Email sales@alphaind.com •www.alphaind.com
Specifications subject to change without notice. 1/01A
Low Distortion Attenuator Plastic Packaged PIN Diodes SMP1304 Series
SOD-323
0.090 (2.30 mm) MIN.
0.108 (2.74 mm) MAX.
0.045 (1.15 mm) MIN.
0.053 (1.35 mm) MAX.
0.050
(1.25 mm) MAX.
0.006
(0.15 mm) TYP.
0.008 (0.20 mm) NOM.
0.004 (0.10 mm) MAX.
0.010 (0.25 mm) MIN.
0.010
(0.25 mm) MIN.
0.016
(0.40 mm) MAX.
0.063 (1.60 mm) MIN.
0.071 (1.80 mm) MAX.
CATHODE
INDICATOR
21
SOT-23
3
2
1
0.035 (0.89 mm) MIN.
0.044 (1.12 mm) MAX.
0.0005 (0.01 mm) MIN.
0.004 (0.10 mm) MAX.
0.012 (0.30 mm) MIN.
0.020 (0.50 mm) MAX.
0.003 (0.080 mm) MIN.
0.008 (0.20 mm) MAX.
8˚ MAX.
0.022 (0.55 mm) REF.
0.110 (2.80 mm) MIN.
0.120 (3.04 mm) MAX.
0.083 (2.10 mm) MIN.
0.104 (2.64 mm) MAX.
0.037 (0.95 mm) REF.
0.047 (1.20 mm) MIN.
0.055 (1.40 mm) MAX.
0.076 (1.92 mm) REF.
0.020 (0.51 mm) REF.
SOT-143
0.110 (2.80 mm) MIN.
0.120 (3.04 mm) MAX.
0.083 (2.10 mm) MIN.
0.104 (2.64 mm) MAX.
0.012 (0.30 mm) MIN.
0.020 (0.50 mm) MAX.
0.0005 (0.01 mm) MIN.
0.004 (0.15 mm) MAX.
0.031 (0.80 mm) MIN.
0.047 (1.20 mm) MAX.
0.030 (0.76 mm) MIN.
0.035 (0.89 mm) MAX.
0.047 (1.20 mm) MIN.
0.055 (1.40 mm) MAX.
0.003 (0.08 mm) MIN.
0.008 (0.20 mm) MAX.
0.022 (0.55 mm) REF.
8˚ MAX.
0.020 (0.50 mm) REF.
0.028 (0.70 mm) REF.
0.068 (1.72 mm) REF.
0.076 (1.92 mm) REF.
43
2
1
SOT-5
0.074
(1.90 mm)
REF. 0.118
(3.00 mm)
0.087
(2.20 mm)
0.012
(0.30 mm)
0.000
(0.00 mm)
MIN.
0.122 (3.10 mm)
0.106 (2.70 mm)
0.064 (1.63 mm)
0.035 (0.90 mm)
0.020 (0.51 mm)
0.014 (0.35 mm)
1
54
23
0.037 (0.95 mm) REF.
0.069
(1.75 mm)
0.052
(1.30 mm)
0.024
(0.61 mm)
0.004
(0.10 mm)
0.0104 (0.26 mm)
0.0035 (0.09 mm) MIN.
0.012 (0.30 mm) TYP.
