Characteristic
Value
Reverse Voltage (V
R
)
12 V
Forward Current (I
F
)
20 mA
Power Dissipation (P
D
)
250 mW
Storage Temperature (T
ST
)
-55C to +150C
Operating Temperature (T
OP
)
-55C to +125C
Absolute Maximum Ratings
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
Hyperabrupt Junction Tuning Varactors
Features
s
Frequency Linear Design
s
Low Series Resistance
s
Available in the SOD-323 and SC-79
Packages
s
Designed for High Volume Commercial
Applications
s
SPICE Models are Available
SMV1142SMV1148
Description
The SMV1142SMV1148 series of silicon hyperabrupt
junction varactor diodes are specifically designed with an
increasing gamma vs. voltage characteristic. This
characteristic will result in improved VCO frequency-voltage
linearity, in comparison to a conventional hyperabrupt
junction varactor. This family of varactors is characterized
for capacitance and resistance over temperature. SPICE
models are provided.
o
Available through distribution.
For other packages or configurations, please contact the factory.
Single
Single
SC-79
SOD-323
o
SMV1142-011
o
SMV1143-011
o
SMV1144-011
o
SMV1145-079
o
SMV1145-011
o
SMV1146-011
o
SMV1147-011
o
SMV1148-011
L
S
= 0.7 nH
L
S
= 1.5 nH
Hyperabrupt Junction Tuning Varactors
SMV1142SMV1148
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
1.0
10.0
100.0
6.0
8.0
4.0
Reverse Voltage (V)
Capacitance vs. Reverse Voltage
2.0
0
Capacitance (pF)
SMV1148
SMV1147
SMV1146
SMV1145
SMV1144
SMV1143
SMV1142
-3
-2
-1
0
1
2
3
4
5
-40
-20
0
20
40
60
80
Percentage Change (%)
Temperature (C)
Relative Capacitance Change
vs. Temperature
V
R
= 1 V
V
R
= 4 V
12
10
8
6
4
2
0
-2
-4
-6
-8
-40
-20
0
20
40
60
80
Percentage Change (%)
Temperature (C)
Relative Series Resistance Change
vs. Temperature
0.4
0.6
0.8
Reverse Voltage (V)
Series Resistance vs. Reverse Voltage
@ 500 MHz
0
1
2
3
4
5
R
S
(
)
SMV1142
SMV1143
SMV1144
SMV1145
SMV1147
SMV1148
SMV1146
Typical Performance Data
C
T
C
T
C
T
@ 1 V
C
T
@ 1 V
R
S
@ 3 V
Q
Part
C
T
@ 1 V
@ 3 V
@ 6 V
C
T
@ 3 V
C
T
@ 6 V
500 MHz
@ 3 V
Number
(pF)
(pF)
(pF)
(Ratio)
(Ratio)
(
)
50 MHz
Min.
Max.
Typ.
Typ.
Min.
Max.
Min.
Max.
Max.
Typ.
SMV1142
8.20
10.00
5.8
3.5
1.50
1.65
2.43
2.93
0.70
800
SMV1143
11.60
14.20
8.2
4.9
1.50
1.65
2.45
2.95
0.65
600
SMV1144
14.65
17.95
10.4
6.1
1.50
1.65
2.46
2.96
0.65
500
SMV1145
25.50
31.20
18.1
10.6
1.50
1.65
2.50
3.00
0.60
300
SMV1146
37.80
46.20
26.4
15.5
1.50
1.65
2.50
3.00
0.60
200
SMV1147
54.60
66.70
38.6
22.6
1.50
1.65
2.50
3.00
0.55
150
SMV1148
62.00
76.00
44.1
25.2
1.50
1.65
2.50
3.00
0.50
150
Electrical Specifications at 25C
Reverse Voltage V
R
(I
R
= 10
A): 12 V
Reverse Current I
R
(V
R
= 9.6 V): 20 nA
Part
C
JO
V
J
M
C
P
R
S
Number
(pF)
(V)
(pF)
(
)
SMV1142
13.38
2.20
1.0
0
0.70
SMV1143
18.99
2.20
1.0
0
0.65
SMV1144
24.01
2.20
1.0
0
0.65
SMV1145
41.80
2.50
1.1
0
0.60
SMV1146
61.13
2.50
1.1
0
0.60
SMV1147
89.52
2.50
1.1
0
0.55
SMV1148
104.70
2.25
1.1
0
0.50
Hyperabrupt Junction Tuning Varactors
SMV1142SMV1148
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
Typical Capacitance Values
SPICE Model
SMV1142
SMV1143
SMV1144
SMV1145
SMV1146
SMV1147
SMV1148
V
R
(V)
C
T
(pF)
C
T
(pF)
C
T
(pF)
C
T
(pF)
C
T
(pF)
C
T
(pF)
C
T
(pF)
0.0
13.38
18.99
24.01
41.81
61.13
89.52
104.71
0.5
10.70
15.18
19.18
33.38
48.97
71.44
83.27
1.0
9.10
12.90
16.30
28.35
41.43
60.65
70.48
1.5
7.98
11.30
14.28
24.82
36.26
53.07
61.48
2.0
7.12
10.08
12.73
22.11
32.30
47.27
54.56
2.5
6.42
9.08
11.46
19.91
29.08
42.55
48.92
3.0
5.83
8.24
10.40
18.06
26.37
38.58
44.13
3.5
5.32
7.51
9.48
16.45
24.01
35.12
39.97
4.0
4.86
6.87
8.66
15.02
21.92
32.06
36.29
4.5
4.45
6.29
7.93
13.73
20.04
29.31
32.99
5.0
4.09
5.76
7.26
12.57
18.34
26.81
30.03
5.5
3.75
5.29
6.66
11.53
16.81
24.57
27.43
6.0
3.46
4.87
6.13
10.60
15.45
22.58
25.22
6.5
3.21
4.51
5.68
9.81
14.30
20.89
23.43
7.0
3.00
4.22
5.31
9.17
13.36
19.52
22.06
7.5
2.84
3.99
5.02
8.66
12.62
18.43
21.01
8.0
2.72
3.82
4.80
8.29
12.07
17.63
20.22
8.5
2.63
3.69
4.63
7.99
11.63
16.98
19.61
9.0
2.56
3.58
4.50
7.76
11.30
16.50
19.12
9.5
2.50
3.50
4.40
7.58
11.03
16.10
18.72
10.0
2.45
3.43
4.31
7.43
10.81
15.78
18.38
10.5
2.41
3.37
4.24
7.30
10.62
15.50
18.11
11.0
2.36
3.31
4.15
7.15
10.40
15.18
17.87
11.5
2.35
3.28
4.15
7.10
10.33
15.08
17.65
12.0
2.32
3.25
4.08
7.02
10.21
14.90
17.43
DIODE
Varactor_Diode
AREA = 1
MODEL = Diode_Model
MODE = nonlinear
RES
R
S
R = R
S
IND
L
S
L = L
S
CAP
C
P
C = C
P
PORT
P_anode
port = 1
PORT
P_Cathode
port = 2
DIODEM
Diode_Model
I
S
= 1.00e-14
R
S
= 0
N = 1
T
T
= 0
C
JO
= C
JO
M = M
V
J
E
G
= 1.11
X
TI
= 3
K
F
=0
A
F
=1
F
C
= 0.5
B
V
= 0
I
BV
= 1e-3
I
SR
= 0
N
R
= 2
I
KF
= 0
N
BV
= 1
I
BVL
= 0
N
BVL
= 1
T
BV1
= 0
T
NOM
= 27
F
FE
= 1
1. Values extracted from measured performance.
2. For package inductance (L
S
) refer to package type.
3. For more details refer to the "Varactor SPICE Models for RF VCO
Applications" Application Note.
Hyperabrupt Junction Tuning Varactors
SMV1142SMV1148
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
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
SC-79
0.060 (1.50 mm) MIN.
0.067 (1.70 mm) MAX.
0.010
(0.25 mm) MIN.
0.014
(0.35 mm) MAX.
0.043 (1.10 mm) MIN.
0.051 (1.30 mm) MAX.
0.020
(0.50 mm) MIN.
0.028
(0.70 mm) MAX.
0.003
(0.07 mm) MIN.
0.008
(0.20 mm) MAX.
10 MAX.
10 MAX.
0.028
(0.70 mm) MIN.
0.035
(0.90 mm) MAX.
0.006 (0.15 mm) MIN.
CATHODE
INDICATOR
1
2
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