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Low Distortion Attenuator Plastic Packaged PIN Diodes
SMP1304 Series Features
s Low Distortion Design s Frequency Range from HF to > 2 GHz s Designed for Base Station Applications s 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 for use in attenuator applications from 5 MHz to beyond 2 GHz. The thick 100 m I region of these PIN diodes makes them very attractive for use in low distortion PI and TEE attenuators commonly used in TV distribution applications. The 1 S typical carrier lifetime of these diodes results in resistance of 20 maximum at 1 mA and 7 maximum at 10 mA. Available in a selection of plastic packages: as a single diode in the small footprint SOD-323 package and in a variety 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 for insertion in TEE attenuators (SMP1304-018) and PI attenuators (SMP1304-019). Also available in a SOT-5 (SMP1304-027) package as a four diode array designed for insertion in the commonly used 4 diode PI attenuator circuit.
Absolute Maximum Ratings
Characteristic Reverse Voltage (VR) Power Dissipation @ 25C Lead Temperature (PD) Storage Temperature (TST) Operating Temperature (TOP) ESD Human Body Model Value 200 V 250 mW -65C to +150C -65C to +150C Class 1C
Single Marking: PG1 SOT-23
o SMP1304-001
Common Cathode Marking: PG3 SOT-23
o SMP1304-004
Series Pair Marking: PG2 SOT-23
o SMP1304-005
Low Inductance Marking: PGB SOT-23
o SMP1304-007
Single
PI Marking: PGJ
PI Marking: PGM SOT-5
o SMP1304-027
SOD-323
o SMP1304-011
SOT-143
o SMP1304-019
LS = 1.5 nH
LS = 1.5 nH
LS = 1.5 nH
LS = 0.4 nH
LS = 1.5 nH
o Available through distribution.
Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com
Specifications subject to change without notice. 1/01A
1
o Available through distribution.
Low Distortion Attenuator Plastic Packaged PIN Diodes
SMP1304 Series
Electrical Specifications at 25C
Parameter Reverse Current (IR) Capacitance (CT) Capacitance (CT) Resistance (RS) Resistance (RS) Resistance (RS) Forward Voltage (VF) Carrier Lifetime (TI) I Region Width VR = 200 V F = 1 MHz, V = 30 V F = 1 MHz, V = 30 V (SMP1304-018 & SMP1304-019) F = 100 MHz, I = 1 mA F = 100 MHz, I = 10 mA F = 100 MHz, I = 100 mA IF = 10 mA IF = 10 mA 0.8 1.0 100 40 Condition Typ. Max. 10 0.30 0.45 50 7.0 2.0 Unit A pF pF V S m
Typical Performance Data
10000 100
Series Resistance ()
1000 100 10 1 0.1 0.01
Forward Current (mA)
10
1
.
0.1
0.1
1
10
100
0.01 400
500
600
700
800
900
1000
Forward Current (mA)
Forward Voltage (mV)
Series Resistance vs. Current @ 100 MHz
0.8 0.7 400 350
DC Characteristic
Capacitance (pF)
0.5 0.4 0.3 0.2 0.1 0 0 1 2 5 10 20 50 100 100 MHz 1 GHz 1 MHz
Conductance (S)
0.6
300 250 200 150 100 50 0 0 500 1000 1500 10 V 40 V 0V
2000
Reverse Voltage (V)
Frequency (MHz)
Capacitance vs. Reverse Voltage
Conductance vs. Frequency and Reverse Voltage
2
Alpha 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
Resistance vs. Temperature @ 100 MHz
IF (mA) 0.02 0.10 0.30 1.00 10.00 20.00 100.00 R -55C () 1590.0 315.0 108.0 34.5 4.8 3.0 1.3 R -15C () 1660.0 340.0 118.0 37.9 5.3 3.3 1.4 R +25C () 1752.0 367.0 128.0 41.6 5.8 3.6 1.5 R +65C () 1770.0 396.0 141.0 46.3 6.6 4.1 1.7 R +100C () 1760.0 409.0 147.0 48.8 7.0 4.3 1.8
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 beyond 1 GHz. The SMP1304 PIN diode junction was designed for low capacitance, wide resistance dynamic range and low distortion performance.
3
1
4
3
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 achieve the effective 0.4 nH, the SOT-23 package must 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.
Gap 2 4 1 2
SMP1304-019 (PI)
Ground
Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com
Specifications subject to change without notice. 1/01A
3
Low Distortion Attenuator Plastic Packaged PIN Diodes
SMP1304 Series
SOT-23
0.110 (2.80 mm) MIN. 0.120 (3.04 mm) MAX.
3
SOD-323
0.012 (0.30 mm) MIN. 0.020 (0.50 mm) MAX. 0.047 (1.20 mm) MIN. 0.055 (1.40 mm) MAX.
1 2
0.090 (2.30 mm) MIN. 0.108 (2.74 mm) MAX. 0.010 (0.25 mm) MIN. 0.016 (0.40 mm) MAX. 0.063 (1.60 mm) MIN. 0.071 (1.80 mm) MAX.
0.083 (2.10 mm) MIN. 0.104 (2.64 mm) MAX.
0.045 (1.15 mm) MIN. 0.053 (1.35 mm) MAX. 1
2
0.037 (0.95 mm) REF. 0.020 (0.51 mm) REF. 0.076 (1.92 mm) REF.
CATHODE INDICATOR
0.008 (0.20 mm) NOM. 0.003 (0.080 mm) MIN. 0.008 (0.20 mm) MAX. 8 MAX. 0.035 (0.89 mm) MIN. 0.044 (1.12 mm) MAX. 0.006 (0.15 mm) TYP. 0.050 (1.25 mm) MAX.
0.004 (0.10 mm) MAX. 0.022 (0.55 mm) REF. 0.0005 (0.01 mm) MIN. 0.004 (0.10 mm) MAX. 0.010 (0.25 mm) MIN.
SOT-143
0.110 (2.80 mm) MIN. 0.120 (3.04 mm) MAX. 0.020 (0.50 mm) REF. 4 0.083 (2.10 mm) MIN. 0.104 (2.64 mm) MAX. 1 0.068 (1.72 mm) REF. 0.028 (0.70 mm) REF. 0.030 (0.76 mm) MIN. 0.035 (0.89 mm) MAX. 0.047 (1.20 mm) MIN. 0.055 (1.40 mm) MAX. 8 MAX. 0.003 (0.08 mm) MIN. 0.008 (0.20 mm) MAX. 0.031 (0.80 mm) MIN. 0.047 (1.20 mm) MAX. 0.012 (0.30 mm) MIN. 0.020 (0.50 mm) MAX. 2 3 0.076 (1.92 mm) REF.
SOT-5
0.074 (1.90 mm) REF. 5 4 0.069 (1.75 mm) 0.052 (1.30 mm) 3 0.037 (0.95 mm) REF. 0.012 (0.30 mm) TYP. 0.024 (0.61 mm) 0.004 (0.10 mm)
0.118 (3.00 mm) 0.087 (2.20 mm)
1 0.020 (0.51 mm) 0.014 (0.35 mm) 0.012 (0.30 mm) 0.000 (0.00 mm) MIN. 0.064 (1.63 mm) 0.035 (0.90 mm)
2
0.022 (0.55 mm) REF.
0.0005 (0.01 mm) MIN. 0.004 (0.15 mm) MAX.
0.122 (3.10 mm) 0.106 (2.70 mm)
0.0104 (0.26 mm) 0.0035 (0.09 mm) MIN.
4
Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com
Specifications subject to change without notice. 1/01A

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