Plastic Packaged Surface
Mount Varactor Diodes
2
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 (T
A
= 25°C)
Forward Current:
Power Dissipation:
Junction Temperature:
Storage Temperature:
Operating Temperature:
100 mA
250 mW
125°C
–55 to 150°C
–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.
Alpha Industries
•
[617] 935 5150
•
Fax
[617] 824 4579
•
E-mail
sales@alphaind.com
•
Visit our web site:
www.alphaind.com
2–3
Plastic Packaged Surface Mount Varactor Diodes
Electrical Characteristics (T
A
= 25°C)
High Ratio Hyperabrupt Junction Varactors for Battery Operated Applications
Breakdown Voltage, V
B
(10
µA):
Reverse Current, I
R
(12V):
C
T
@ 0.3V
C
T
@ 4.7V
4 7V
(Ratio)
Typ.
.7
1.5
2.6
3.0
3.4
4.3
5.2
Min.
9.5
10.8
11.0
11.0
11.0
11.0
11.0
Typ.
10.0
16.5
12.1
12.2
12.2
12.3
12.3
R
S
@ 3V
200 MHz
00
(W)
15V Min.
50 nA Max.
C
T
@ 0.3V
(pF)
C
T
@ 4.7V
(pF)
SOD–323
Single
SMV1247–011
SMV1248–011
SMV1249–011
SMV1250–011
SMV1251–011
SMV1253–011
SMV1255–011
Single
SMV1247–001
SMV1248–001
SMV1249–001
SMV1250–001
SMV1251–001
SMV1253–001
SMV1255–001
Common
Anode
SOT–23
Common
Cathode
SMV1247–004
SMV1248–004
SMV1249–003
SMV1249–004
SMV1250–004
SMV1251–004
SMV1253–004
SMV1255–003
SMV1255–004
Low
Inductance
SOT–143
Unconnected
Pair
Min.
6.5
15
28
33
38
48
58
Typ.
7.0
17
31
36
42
53
64
Max.
.78
1.7
2.8
3.3
3.8
4.8
5.8
Max.
2.0
1.8
1.5
1.5
1.3
1.2
1.0
12 Volt Hyperabrupt Junction Varactors
Reverse Breakdown Voltage, V
B
(10
µA):
Reverse Current, I
R
(8V):
12V Min.
50 nA Max.
C
T
@ 1V
(pF)
Min.
95
42
17
14.5
8.7
85
Typ.
100
50
22
16
9.5
–
C
T
@ 2.5V
(pF)
Min.
40
18
8.5
6.5
4.3
–
Max.
65
27
10.5
7.8
5.5
–
Typ.
20
9.0
4.0
3.0
2.0
15.0
C
T
@ 4V
(pF)
Max.
25
12
5.5
4.8
2.9
30.0
Q
@ 4V
50 MHz
Min.
80
150
200
300
350
500
*
SOD–323
Single
Single
SMV1211–001
SMV1212–001
SMV1213–011
SMV1213–001
SMV1214–001
SMV1215–011
SMV1215–001
SMV1297–001
SMV1214–003
Common
Anode
SOT–23
Common
Cathode
Low
Inductance
SOT–143
Unconnected
Pair
SMV1212–004
SMV1213–004
*
Q @ 2V, F=1 MHz
Breakdown Voltage, V
B
(10
µA):
Reverse Current, I
R
(10V):
12V Min.
50 nA Max.
C
T
@ 0.2V
(pF)
Min.
11
Max.
14
Min.
4
C
T
@ 2V
(pF)
Max.
6.5
Min.
1.2
C
T
@ 6V
(pF)
Max.
1.9
Q
@ 2V
50 MHz
Min.
250
SOD–323
Single
SMV1299–011
Single
SMV1299–001
Common
Anode
SOT–23
Common
Cathode
SMV1299–004
Low
Inductance
SOT–143
Unconnected
Pair
SMV1299–015
"
All plastic packaged varactors are available through distribution.
2–4
Alpha Industries
•
[617] 935 5150
•
Fax
[617] 824 4579
•
E-mail
sales@alphaind.com
•
Visit our web site:
www.alphaind.com
Plastic Packaged Surface Mount Varactor Diodes
12 Volt Hyperabrupt Junction Varactors (cont.)
Reverse Breakdown Voltage, V
B
(10
µA):
Reverse Current, I
R
(8V):
C
T
@ 1V
C
T
@ 2.5V
(Ratio)
Min.
1.5
1.5
1.5
1.5
Max.
2.0
2.0
2.0
2.0
C
T
@ 2.5V
C
T
@ 4V
(Ratio)
Min.
1.5
1.5
1.5
1.5
Max.
2.0
2.0
2.0
2.0
12V Min.
50 nA
C
T
@ 2.5V
5
(pF)
Min.
18
9
6
4.2
Typ.
27
13
8
5.6
Q
@ 4V
50 MHz
Min.
150
200
300
350
SOD–323
Single
SMV1222–011
SMV1223–011
Single
SMV1222–001
SMV1223–001
SMV1224–001
SMV1225–001
Common
Anode
SOT–23
Common
Cathode
Low
Inductance
SOT–143
Unconnected
Pair
2
15 Volt Hyperabrupt Junction Varactors
Reverse Breakdown Voltage, V
B
(10
µA):
Reverse Current, I
R
(12V):
C
T
@ 1V
C
T
@ 3V
(Ratio)
C
T @
1V
C
T
@ 6V
(Ratio)
R
s
@ 3V
50 MHz
(W)
Max..
1.2
0.8
0.6
0.5
0.25
15V Min.
50 nA Max.
C
T
@ 1V
(pF)
Min.
3.0
5.85
10.35
15.50
45.00
Max.
3.6
7.15
12.65
18.50
54.0
Q
@ 3V
50 MHz
Min.
1200
1000
750
700
500
SOD–323
Single
SMV1233–011
SMV1234–011
SMV1235–011
SMV1236–011
Single
SMV1233–001
SMV1234–001
SMV1235–001
SMV1236–001
SMV1237–001
Common
Anode
SOT–23
Common
Cathode
SMV1233–004
SMV1234–004
SMV1235–004
SMV1236–003
SMV1236–004
SMV1237–004
Low
Inductance
SOT–143
Unconnected
Pair
Min.
1.5
1.6
1.6
1.6
1.6
Max.
1.9
2.0
2.0
2.0
2.0
Min.
2.6
2.8
2.9
3.0
3.0
Max.
3.3
3.4
3.4
3.5
3.5
SMV1233–003
SMV1234–003
22 Volt Hyperabrupt Junction Varactors
Reverse Breakdown Voltage, V
B
(10
µA):
Reverse Current, I
R
(17.6 V):
C
T
1
C
T
@ V
R
1
(pF)
Min.
10.5
25
2.5
4.4
18
45
100
Max.
12.5
31
3.3
5.4
22
55
120
3
3
4
4
4
4
4
V
R
1
(V)
C
T
@ V
R
2
(pF)
Min.
2.1
4.5
0.6
0.9
3.1
7.3
16
Max.
2.5
5.3
0.85
1.2
3.9
9.2
20
20
20
20
20
20
20
20
V
R
2
(V)
C
T
2
(Ratio)
Min.
4.6
4.8
3.0
4.2
4.6
5.0
5.2
Q
@ V
R
1
50 MHz
Min.
400
300
500
500
300
200
125
SMV2022–011
SMV2023–011
SOD–323
Single
SMV1206–011
Single
SMV1206–001
SMV1207–001
SMV2022–001
SMV2023–001
SMV1227–001
SMV1228–001
SMV1229–001
SMV2022–003
SMV2023–003
Common
Anode
SOT–23
Common
Cathode
SMV1206–004
SMV1207–004
SMV2022–004
SMV2023–004
Low
Inductance
SOT–143
Unconnected
Pair
22V Min.
50 nA Max.
"
All plastic packaged varactors are available through distribution.
Alpha Industries
•
[617] 935 5150
•
Fax
[617] 824 4579
•
E-mail
sales@alphaind.com
•
Visit our web site:
www.alphaind.com
2–5
Plastic Packaged Surface Mount Varactor Diodes
Low Series Resistance Abrupt Junction Varactors
Reverse Breakdown Voltage, V
BR
(10
µA):
Reverse Current, I
R
(10V):
R
s
@ 3V
50 MHz
(W)
Max.
0.25
0.20
12V Min.
50 nA Max.
C
T
@ 1.0V
(pF)
Min.
17.4
36.3
Max.
20.0
41.7
C
T
@ 4.0V
4 0V
(pF)
Min.
10.0
20.7
Max.
12.1
25.3
SOD–323
Single
SMV1493–011
SMV1494–011
Single
SOT– 23
Common
Anode
Common
Cathode
Low
Inductance
SOT–143
Unconnected
Pair
"
All plastic packaged varactors are available through distribution.
2–6
Alpha Industries
•
[617] 935 5150
•
Fax
[617] 824 4579
•
E-mail
sales@alphaind.com
•
Visit our web site:
www.alphaind.com
Plastic Packaged Surface Mount Varactor Diodes
30 Volt Abrupt Junction Varactors
Reverse Breakdown Voltage, V
BR
(10
µA):
Reverse Current, I
R
(24V):
C
T
0
C
T
@ 4V
(pF)
Min.
1.21
1.75
2.11
2.56
3.10
3.64
4.36
5.17
6.25
7.51
9.13
10.93
13.63
16.33
29.83
Max.
1.45
2.11
2.55
3.10
3.76
4.42
5.30
6.29
7.61
9.15
11.13
13.33
16.63
19.93
36.43
C
T
30
(Ratio)
Min.
4.1
4.1
4.1
4.2
4.2
4.2
4.2
4.3
4.3
4.3
4.4
4.4
4.4
4.4
4.5
R
S
@ 4V
50 MHz
(W)
Max.
0.8
0.60
0.50
0.45
0.40
0.35
0.30
0.27
0.24
0.22
0.20
0.19
0.18
0.18
0.16
30V Min.
50nA Max.
Q
@ 4V
50 MHz
Min.
3200
2900
2800
2600
2500
2400
2200
2100
2000
1800
1600
1400
1200
1000
600
SOD–323
Single
Single
SMV1405–001
SMV1408–011
SMV1408–001
SMV1409–001
SMV1410–001
SMV1411–001
SMV1413–001
SMV1414–001
SMV1415–001
SMV1416–001
SMV1417–001
SMV1419–001
SMV1420–001
SMV1421–001
SMV1422–001
SMV1426–001
Common
Anode
SOT–23
Common
Cathode
SMV1405–004
SMV1408–004
SMV1409–004
SMV1410–004
SMV1411–004
SMV1413–004
SMV1414–004
SMV1415–004
SMV1416–004
SMV1417–004
Low
Inductance
SOT–143
Unconnected
Pair
2
"
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
C
T
specifications to indicate junction capacitance.
"
Chips available through distribution:
SMV1212–000
SMV1213–000
SMV1214–000
SMV1233–000
SMV1236–000
Alpha Industries
•
[617] 935 5150
•
Fax
[617] 824 4579
•
E-mail
sales@alphaind.com
•
Visit our web site:
www.alphaind.com
2–7
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