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
Very Low Distortion Attenuator
Plastic Packaged PIN Diodes
Features
s
Low Distortion Design
s
Frequency Range from HF to > 2 GHz
s
Designed for CATV AGC Applications
s
Designed for High Volume Wireless
Applications
Description
The SMP1307 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 175
m I region of these PIN
diodes makes them very attractive for use in very low
distortion PI and TEE attenuators commonly used in TV
distribution applications. The 1.5
S typical carrier
lifetime of these diodes results in resistance of 100
maximum at 1 mA and 10
maximum at 10 mA. Available
in a selection of plastic packages, as a single diode in the
small footprint SOD-323, and in a variety of configurations
in the SOT-23. Also available in a SOT-5 (SMP1307-027)
package as a four diode array designed for insertion in the
commonly used 4 diode PI attenuator circuit.
SMP1307 Series
Characteristic
Value
Reverse Voltage (V
R
)
200 V
Power Dissipation @ 25C Lead
250 mW
Temperature (P
D
)
Storage Temperature (T
ST
)
-65C to +150C
Operating Temperature (T
OP
)
-65C to +150C
ESD Human Body Model
Class 1C
Absolute Maximum Ratings
Single
Common Series
Pair
Single
PI
Cathode
Marking: PJ1
Marking: PJ3
Marking: PJ2
Marking: PJM
SOT-23
SOT-23
SOT-23
SOD-323
SOT-5
o
SMP1307-001
o
SMP1307-004
o
SMP1307-005
o
SMP1307-011
o
SMP1307-027
L
S
= 1.5 nH
L
S
= 1.5 nH
L
S
= 1.5 nH
L
S
= 1.5 nH
o
Available through distribution.
Parameter
Condition
Typ.
Max.
Unit
Reverse Current (I
R
)
V
R
= 200 V
10
A
Capacitance (C
T
)
F = 1 MHz, V = 30 V
0.30
pF
Resistance (R
S
)
F = 100 MHz, I = 1 mA
75
100
Resistance (R
S
)
F = 100 MHz, I = 10 mA
15
Resistance (R
S
)
F = 100 MHz, I = 100 mA
3.0
Forward Voltage (V
F
)
IF = 10 mA
0.85
V
Carrier Lifetime (TI)
IF = 10 mA
1.5
S
I Region Width
175
m
Electrical Specifications at 25C
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
Very Low Distortion Attenuator Plastic Packaged PIN Diodes
SMP1307 Series
Series Resistance vs. Current @ 100 MHz
0.01
0.1
1
10
100
Forward Current (mA)
Series Resistance (
)
0.1
1
10
100
1000
10000
0
1
2
5
10
20
100
50
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 (
S)
0
50
100
150
200
250
300
350
400
0 V
10 V
40 V
Typical Performance Data
R
R
R
R
R
I
F
-55C
-15C
+25C
+65C
+100C
(mA)
(
)
(
)
(
)
(
)
(
)
0.02
2386.0
2360.0
2546.0
2520.0
2440.0
0.10
572.0
598.0
632.0
633.0
639.0
0.30
203.0
219.0
236.0
239.0
242.0
1.00
66.1
71.2
79.3
83.6
85.4
10.00
9.1
10.0
10.9
12.2
12.9
20.00
5.6
6.0
6.6
7.4
7.8
100.00
2.2
2.4
2.6
3.0
3.2
Resistance vs. Temperature @ 100 MHz
Very Low Distortion Attenuator Plastic Packaged PIN Diodes
SMP1307 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
SMP1307-027 4 Diode PI Attenuator
The SMP1307-027 employs 4 PIN diode junctions in a
5-lead SOT package. It is configured for ease of
insertion in the PI attenuator circuit commonly used for
broadband TV distribution systems, covering a frequency
range from 5 MHz to beyond 1 GHz.
A broadband attenuator was designed using the
SMP1307-027 showing good performance to 2 GHz. The
attenuator was evaluated with a 50
source and load
impedance. The following figure shows the circuit
diagram and measured performance.
C
1
10,000 pF
C
2
10,000 pF
C
4
10,000 pF
C
5
10,000 pF
C
6
10,000 pF
C
3
10,000 pF
R
2
1 k
R
1
1 k
R
3
1 k
R
5
560
R
4
1 k
R
6
560
D
1
D
2
D
3
D
4
V
TUNE
020 V
V
REF
5 V
RF
Output
RF
Input
4
5
1
2
3
A 4 diode PI attenuator utilizing individual SMP1307-011 PIN diodes is described in the "A Wideband General Purpose PIN Diode Attenuator" Application Note.
D
1
D
4
SMP1307-027
-50
-40
-30
-20
-10
0
0
0.5
1.0
1.5
2.0
Frequency (GHz)
Attenuation (dB)
V
CTL
= 20 V
V
CTL
= 15 V
V
CTL
= 10 V
V
CTL
= 5 V
V
CTL
= 0 V
SMP1307-027 Attenuation vs. Frequency
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
Very Low Distortion Attenuator Plastic Packaged PIN Diodes
SMP1307 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
2
1
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-5
0.110 (2.79 mm) MIN.
0.118 (3.00 mm) MAX.
0.014
(0.36 mm)
MIN.
0.020
(0.51 mm)
MAX.
0.102
(2.59 mm)
MIN.
0.118
(3.00 mm)
MAX.
0.060
(1.52 mm)
MIN.
0.069
(1.75 mm)
MAX.
0.037
(0.94 mm) REF.
0.037
(0.94 mm) REF.
1
2
3
4
5
0.004 (0.10 mm) MIN.
0.024 (0.61 mm) MAX.
0.134
(3.4 mm)
10 MAX.
0.035
(0.89 mm)
MIN.
0.057
(1.49 mm)
MAX.
0.000 (0.00 mm) MIN.
0.006 (0.15 mm) MAX.
0.035 (0.89 mm) MIN.
0.051 (1.30 mm) MAX.
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