2
2–3
Alpha Industries
• •
Fax
•
E-mail
•
Visit our web site:
Features
Industry Standard Outlines: SOD–323 and
SOT–23 Packages
High “Q” Abrupt and Hyperabrupt Junction
Designs
Single, Common Anode and Common Cathode
Configurations
Available for 3 Volt Battery Operated Circuits
Priced for High Volume Commercial
Applications
Available in Tape and Reel
Also Available as Chips
Maximum Ratings (TA = 25
°
C)
Forward Current: 100 mA
Power Dissipation: 250 mW
Junction Temperature: 125°C
Storage Temperature: –55 to 150°C
Operating Temperature: –55 to 125°C
Description
The surface mount plastic varactor diodes are
designed for RF and Microwave applications in
VCOs, electronically tunable filters and matching
networks. Package offerings include the SOT–23 and
the small footprint SOD–323 package. Alpha offers a
comprehensive capability in capacitance values,
package options and voltage ratings all aggressively
priced for high volume commercial applications.
The SMV1247–001 to SMV1255–001 varactors were
specifically designed for battery operated
applications where 3 to 5 volts is available. These
varactors have capacitance ratios of greater than 12
from 0.3 to 4.7 volts.
Alpha’s hyperabrupt varactors are available in a wide
variety of tightly specified capacitance values and
high capacitance ratios. They are available as single
junctions and common cathode configurations where
they may be employed in a back–to–back orientation
to reduce distortion.
Alpha’s abrupt junction varactors are noted for
extremely high Q factor and are the preferred choice
in applications that require low phase noise and high
temperature stability.
The inductance of the SOT–23 package is typically
1.5 nH for each junction. Employing a common
cathode SOT–23 with the varactor junctions
connected in parallel reduces the inductance to
approximately 0.9 nH. The inductance of a varactor
in the SOD–323 package is approximately 1.5 nH.
Plastic Packaged Surface
Mount Varactor Diodes
2–4 Alpha Industries
• •
Fax
•
E-mail
•
Visit our web site:
Electrical Characteristics (TA = 25
°
C)
High Ratio Hyperabrupt Junction Varactors for Battery Operated Applications
Breakdown Voltage, VB (10 µA): 15V Min.
Reverse Current, IR (12V): 50 nA Max.
CT
@ 0.3V CT
@ 4.7V
CT @ 0.3V
CT@47V
RS
@ 3V
200 MHz
@
0.3V
(pF)
@
4.7V
(pF)
CT
@
4
.
7V
(Ratio)
00
(
)SOD–323 SOT–23 SOT–143
Min. Typ. Max. Typ. Min. Typ. Max. Single Single Common
Anode Common
Cathode Low
Inductance Unconnected
Pair
6.5 7.0 .78 .7 9.5 10.0 2.0 SMV1247–011 SMV1247–001 SMV1247–004
15 17 1.7 1.5 10.8 16.5 1.8 SMV1248–011 SMV1248–001 SMV1248–004
28 31 2.8 2.6 11.0 12.1 1.5 SMV1249–011 SMV1249–001 SMV1249–003 SMV1249–004
33 36 3.3 3.0 11.0 12.2 1.5 SMV1250–011 SMV1250–001 SMV1250–004
38 42 3.8 3.4 11.0 12.2 1.3 SMV1251–011 SMV1251–001 SMV1251–004
48 53 4.8 4.3 11.0 12.3 1.2 SMV1253–011 SMV1253–001 SMV1253–004
58 64 5.8 5.2 11.0 12.3 1.0 SMV1255–011 SMV1255–001 SMV1255–003 SMV1255–004
12 Volt Hyperabrupt Junction Varactors
Reverse Breakdown Voltage, VB (10 µA): 12V Min.
Reverse Current, IR (8V): 50 nA Max.
CT
@1V
CT
@ 2.5V
CT
@4V
Q
@ 4V
@
1V
(pF)
@
2
.
5V
(pF)
@
4V
(pF)
@
4V
50 MHz SOD–323 SOT–23 SOT–143
Min. Typ. Min. Max. Typ. Max. Min. Single Single Common
Anode Common
Cathode Low
Inductance Unconnected
Pair
95 100 40 65 20 25 80 SMV1211–001
42 50 18 27 9.0 12 150 SMV1212–001 SMV1212–004
17 22 8.5 10.5 4.0 5.5 200 SMV1213–011 SMV1213–001 SMV1213–004
14.5 16 6.5 7.8 3.0 4.8 300 SMV1214–001 SMV1214–003
8.7 9.5 4.3 5.5 2.0 2.9 350 SMV1215–011 SMV1215–001
85 – – – 15.0 30.0 500*SMV1297–001
*Q @ 2V, F=1 MHz
Breakdown Voltage, VB (10 µA): 12V Min.
Reverse Current, IR (10V): 50 nA Max.
CT
@ 0.2V CT
@ 2V CT
@ 6V Q
@2V
@
0.2V
(pF)
@
2V
(pF)
@
6V
(pF)
@
2V
50 MHz SOD–323 SOT–23 SOT–143
Min. Max. Min. Max. Min. Max. Min. Single Single Common
Anode Common
Cathode Low
Inductance Unconnected
Pair
11 14 4 6.5 1.2 1.9 250 SMV1299–011 SMV1299–001 SMV1299–004 SMV1299–015
All plastic packaged varactors are available through distribution.
Plastic Packaged Surface Mount Varactor Diodes
2
2–5
Alpha Industries
• •
Fax
•
E-mail
•
Visit our web site:
12 Volt Hyperabrupt Junction Varactors (cont.)
Reverse Breakdown Voltage, VB (10 µA): 12V Min.
Reverse Current, IR (8V): 50 nA
CT
@ 2.5V
CT @ 1V
C
T
@ 2.5V
CT @ 2.5V
CT
@
4V Q
@ 4V
@5
(pF)
CT
@
2.5V
(Ratio)
CT
@
4V
(Ratio)
@
4V
50 MHz SOD–323 SOT–23 SOT–143
Min. Typ. Min. Max. Min. Max. Min. Single Single Common
Anode Common
Cathode Low
Inductance Unconnected
Pair
18 27 1.5 2.0 1.5 2.0 150 SMV1222–011 SMV1222–001
9 13 1.5 2.0 1.5 2.0 200 SMV1223–011 SMV1223–001
6 8 1.5 2.0 1.5 2.0 300 SMV1224–001
4.2 5.6 1.5 2.0 1.5 2.0 350 SMV1225–001
15 Volt Hyperabrupt Junction Varactors
Reverse Breakdown Voltage, VB (10 µA): 15V Min.
Reverse Current, IR (12V): 50 nA Max.
CT
@1V
CT @ 1V
CT@3V
CT @ 1V
CT@6V
Rs
@ 3V
50 MHz
Q
@3V
@
1V
(pF)
CT
@
3V
(Ratio)
CT
@
6V
(Ratio)
50
MHz
(
)
@
3V
50 MHz SOD–323 SOT–23 SOT–143
Min. Max. Min. Max. Min. Max. Max.. Min. Single Single Common
Anode Common
Cathode Low
Inductance Unconnected
Pair
3.0 3.6 1.5 1.9 2.6 3.3 1.2 1200 SMV1233–011 SMV1233–001 SMV1233–003 SMV1233–004
5.85 7.15 1.6 2.0 2.8 3.4 0.8 1000 SMV1234–011 SMV1234–001 SMV1234–003 SMV1234–004
10.35 12.65 1.6 2.0 2.9 3.4 0.6 750 SMV1235–011 SMV1235–001 SMV1235–004
15.50 18.50 1.6 2.0 3.0 3.5 0.5 700 SMV1236–011 SMV1236–001 SMV1236–003 SMV1236–004
45.00 54.0 1.6 2.0 3.0 3.5 0.25 500 SMV1237–001 SMV1237–004
22 Volt Hyperabrupt Junction Varactors
Reverse Breakdown Voltage, VB (10 µA): 22V Min.
Reverse Current, IR (17.6 V): 50 nA Max.
CT
@V
R
1
V
R
1
CT
@V
R
2
VR2
CT1
CT2
Q
@V
R
1
@
VR1
(pF)
VR1
(V)
@
VR2
(pF)
R
(V)
CT2
(Ratio)
@
VR1
50 MHz
SOD–323 S OT–23 SOT–143
Min. Max. Min. Max. Min. Min. Single Single Common
Anode Common
Cathode Low
Inductance Unconnected
Pair
10.5 12.5 3 2.1 2.5 20 4.6 400 SMV1206–011 SMV1206–001 SMV1206–004
25 31 3 4.5 5.3 20 4.8 300 SMV1207–001 SMV1207–004
2.5 3.3 4 0.6 0.85 20 3.0 500 SMV2022–011 SMV2022–001 SMV2022–003 SMV2022–004
4.4 5.4 4 0.9 1.2 20 4.2 500 SMV2023–011 SMV2023–001 SMV2023–003 SMV2023–004
18 22 4 3.1 3.9 20 4.6 300 SMV1227–001
45 55 4 7.3 9.2 20 5.0 200 SMV1228–001
100 120 4 16 20 20 5.2 125 SMV1229–001
All plastic packaged varactors are available through distribution.
Plastic Packaged Surface Mount Varactor Diodes
2–6 Alpha Industries
• •
Fax
•
E-mail
•
Visit our web site:
Low Series Resistance Abrupt Junction Varactors
Reverse Breakdown Voltage, VBR (10 µA): 12V Min.
Reverse Current, IR (10V): 50 nA Max.
CT
@ 1.0V
CT
@40V
Rs
@ 3V
50 MHz
@
1
.
0V
(pF)
@
4
.
0V
(pF)
50
MHz
(
)SOD–323 S OT– 2 3 SOT–143
Min. Max. Min. Max. Max. Single Single Common
Anode Common
Cathode Low
Inductance Unconnected
Pair
17.4 20.0 10.0 12.1 0.25 SMV1493–011
36.3 41.7 20.7 25.3 0.20 SMV1494–011
All plastic packaged varactors are available through distribution.
Plastic Packaged Surface Mount Varactor Diodes
2
2–7
Alpha Industries
• •
Fax
•
E-mail
•
Visit our web site:
30 Volt Abrupt Junction Varactors
Reverse Breakdown Voltage, VBR (10 µA): 30V Min.
Reverse Current, IR (24V): 50nA Max.
CT
@4V
CT0
C
T
30
RS
@ 4V
50
MHz Q
@4V
@
4V
(pF)
CT30
(Ratio)
50
MHz
(
)
@
4V
50 MHz SOD–323 SOT–23 SOT–143
Min. Max. Min. Max. Min. Single Single Common
Anode Common
Cathode Low
Inductance Unconnected
Pair
1.21 1.45 4.1 0.8 3200 SMV1405–001 SMV1405–004
1.75 2.11 4.1 0.60 2900 SMV1408–011 SMV1408–001 SMV1408–004
2.11 2.55 4.1 0.50 2800 SMV1409–001 SMV1409–004
2.56 3.10 4.2 0.45 2600 SMV1410–001 SMV1410–004
3.10 3.76 4.2 0.40 2500 SMV1411–001 SMV1411–004
3.64 4.42 4.2 0.35 2400 SMV1413–001 SMV1413–004
4.36 5.30 4.2 0.30 2200 SMV1414–001 SMV1414–004
5.17 6.29 4.3 0.27 2100 SMV1415–001 SMV1415–004
6.25 7.61 4.3 0.24 2000 SMV1416–001 SMV1416–004
7.51 9.15 4.3 0.22 1800 SMV1417–001 SMV1417–004
9.13 11.13 4.4 0.20 1600 SMV1419–001
10.93 13.33 4.4 0.19 1400 SMV1420–001
13.63 16.63 4.4 0.18 1200 SMV1421–001
16.33 19.93 4.4 0.18 1000 SMV1422–001
29.83 36.43 4.5 0.16 600 SMV1426–001
All plastic packaged varactors are available through distribution.
1. Capitance measured at 1 MHz.
2. For multiple junction packages specifications apply to single junction.
Unpackaged chips are available for purchase by
replacing the dash number with –000. For example,
to purchase the chip from the SMV1408–001, the part
number becomes SMV1408–000. The package
capacitance of 0.13 pF should be subtracted from the
CT specifications to indicate junction capacitance.
Chips available through distribution:
SMV1212–000
SMV1213–000
SMV1214–000
SMV1233–000
SMV1236–000
Plastic Packaged Surface Mount Varactor Diodes
2–8 Alpha Industries
• •
Fax
•
E-mail
•
Visit our web site:
Typical Capacitance Curves
0.1
1.0
10.0
100.0
0246810
SMV1237
SMV1236
SMV1235
SMV1234
SMV1233
Capacitance (pF)
Reverse Voltage (Volts)
Capacitance vs. Reverse Voltage
1
10
100
0.1 1.0 10.0
Capacitance vs. Reverse Voltage
Capacitance (pF)
SMV1493
SMV1494
Reverse Voltage (Volts)
1
10
100
1000
02468
Capacitance (pF)
Reverse Voltage (Volts)
SMV1211
SMV1212
SMV1213
SMV1214
SMV1215
Capacitance vs. Reverse Voltage
1
10
100
1000
0 2 4 6 8 101214161820
Capacitance (pF)
Reverse Voltage (Volts)
SMV1229
SMV1228
SMV1227
SMV1205
SMV1244 SMV1206
SMV1207
Capacitance vs. Reverse Voltage
1
10
100
0 2 4 6 8 101214161820
Capacitance (pF)
Reverse Voltage (Volts)
SMV1408
SMV1410
SMV1413
SMV1415
SMV1417
SMV1419
SMV1421
SMV1422
Capacitance vs. Reverse Voltage
0.1
1.0
10.0
100.0
110
Capacitance vs. Reverse Voltage
Capacitance (pF)
Reverse Voltage (Volts)
SMV1253
SMV1251
SMV1250
SMV1255
SMV1249
SMV1248
SMV1247
Plastic Packaged Surface Mount Varactor Diodes
2–9
Alpha Industries
• •
Fax
•
E-mail
•
Visit our web site:
Outline Dimensions
SOT–23
SOT–143
SOD–323
0.108 (2.70mm)
0.090 (2.30mm)
0.053 (1.35mm)
0.045 (1.15mm)
0.016 (0.40mm)
0.010 (0.25mm)
0.071 (1.80mm)
0.063 (1.60mm)
0.008
(0.20mm)
0.050 (1.25mm)
MAX.
0.004 (0.10mm)
MAX.
0.006 (0.15mm)
TYP.
0.010 (0.25mm)
MIN.
Plastic Packaged Surface Mount Varactor Diodes
