Hyperabrupt Junction Tuning Varactors
SMV1142–SMV1148
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
Description
The SMV1142–SMV1148 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.
Absolute Maximum Ratings
Characteristic
Reverse Voltage (V
R
)
Forward Current (I
F
)
Power Dissipation (P
D
)
Storage Temperature (T
ST
)
Operating Temperature (T
OP
)
Value
12 V
20 mA
250 mW
-55°C to +150°C
-55°C to +125°C
Single
SC-79
Single
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
o
Available through distribution.
For other packages or configurations, please contact the factory.
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
Hyperabrupt Junction Tuning Varactors
SMV1142–SMV1148
Electrical Specifications at 25°C
Part
Number
SMV1142
SMV1143
SMV1144
SMV1145
SMV1146
SMV1147
SMV1148
C
T
@ 1 V
(pF)
Min.
8.20
11.60
14.65
25.50
37.80
54.60
62.00
Max.
10.00
14.20
17.95
31.20
46.20
66.70
76.00
C
T
@ 3V
(pF)
Typ.
5.8
8.2
10.4
18.1
26.4
38.6
44.1
C
T
@ 6V
(pF)
Typ.
3.5
4.9
6.1
10.6
15.5
22.6
25.2
C
T
@ 1 V
C
T
@ 3 V
(Ratio)
Min.
1.50
1.50
1.50
1.50
1.50
1.50
1.50
Max.
1.65
1.65
1.65
1.65
1.65
1.65
1.65
C
T
@ 1 V
C
T
@ 6 V
(Ratio)
Min.
2.43
2.45
2.46
2.50
2.50
2.50
2.50
Max.
2.93
2.95
2.96
3.00
3.00
3.00
3.00
R
S
@ 3 V
500 MHz
Ω
(Ω)
Max.
0.70
0.65
0.65
0.60
0.60
0.55
0.50
Q
@ 3V
50 MHz
Typ.
800
600
500
300
200
150
150
Reverse Voltage V
R
(I
R
= 10
µA):
12 V
Reverse Current I
R
(V
R
= 9.6 V): 20 nA
Typical Performance Data
100.0
SMV1148
SMV1147
SMV1146
0.8
SMV1142
SMV1143
Capacitance (pF)
R
S
(Ω)
SMV1144
0.6
SMV1145
SMV1146
SMV1147
10.0
SMV1145
SMV1144
SMV1143
1.0
0
2.0
4.0
6.0
8.0
SMV1142
SMV1148
0.4
0
1
2
3
4
5
Reverse Voltage (V)
Reverse Voltage (V)
Capacitance vs. Reverse Voltage
Series Resistance vs. Reverse Voltage
@ 500 MHz
12
5
Percentage Change (%)
Percentage Change (%)
V
R
= 4 V
20
40
60
80
4
3
2
1
0
-1
-2
-3
-40
-20
0
V
R
= 1 V
10
8
6
4
2
0
-2
-4
-6
-8
-40
-20
0
20
40
60
80
Temperature (˚C)
Temperature (˚C)
Relative Capacitance Change
vs. Temperature
Relative Series Resistance Change
vs. Temperature
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
Hyperabrupt Junction Tuning Varactors
SMV1142–SMV1148
Typical Capacitance Values
SMV1142
V
R
(V)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
C
T
(pF)
13.38
10.70
9.10
7.98
7.12
6.42
5.83
5.32
4.86
4.45
4.09
3.75
3.46
3.21
3.00
2.84
2.72
2.63
2.56
2.50
2.45
2.41
2.36
2.35
2.32
SMV1143
C
T
(pF)
18.99
15.18
12.90
11.30
10.08
9.08
8.24
7.51
6.87
6.29
5.76
5.29
4.87
4.51
4.22
3.99
3.82
3.69
3.58
3.50
3.43
3.37
3.31
3.28
3.25
SMV1144
C
T
(pF)
24.01
19.18
16.30
14.28
12.73
11.46
10.40
9.48
8.66
7.93
7.26
6.66
6.13
5.68
5.31
5.02
4.80
4.63
4.50
4.40
4.31
4.24
4.15
4.15
4.08
SMV1145
C
T
(pF)
41.81
33.38
28.35
24.82
22.11
19.91
18.06
16.45
15.02
13.73
12.57
11.53
10.60
9.81
9.17
8.66
8.29
7.99
7.76
7.58
7.43
7.30
7.15
7.10
7.02
SMV1146
C
T
(pF)
61.13
48.97
41.43
36.26
32.30
29.08
26.37
24.01
21.92
20.04
18.34
16.81
15.45
14.30
13.36
12.62
12.07
11.63
11.30
11.03
10.81
10.62
10.40
10.33
10.21
SMV1147
C
T
(pF)
89.52
71.44
60.65
53.07
47.27
42.55
38.58
35.12
32.06
29.31
26.81
24.57
22.58
20.89
19.52
18.43
17.63
16.98
16.50
16.10
15.78
15.50
15.18
15.08
14.90
SMV1148
C
T
(pF)
104.71
83.27
70.48
61.48
54.56
48.92
44.13
39.97
36.29
32.99
30.03
27.43
25.22
23.43
22.06
21.01
20.22
19.61
19.12
18.72
18.38
18.11
17.87
17.65
17.43
SPICE Model
PORT
P_anode
port = 1
IND
L
S
L = L
S
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
Part
Number
SMV1142
SMV1143
SMV1144
SMV1145
SMV1146
SMV1147
SMV1148
C
JO
(pF)
13.38
18.99
24.01
41.80
61.13
89.52
104.70
V
J
(V)
2.20
2.20
2.20
2.50
2.50
2.50
2.25
M
1.0
1.0
1.0
1.1
1.1
1.1
1.1
C
P
(pF)
0
0
0
0
0
0
0
R
S
Ω
(Ω)
0.70
0.65
0.65
0.60
0.60
0.55
0.50
RES
R
S
R = R
S
DIODE
Varactor_Diode
AREA = 1
MODEL = Diode_Model
MODE = nonlinear
CAP
C
P
C = C
P
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.
PORT
P_Cathode
port = 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
3
Hyperabrupt Junction Tuning Varactors
SMV1142–SMV1148
SOD-323
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.
SC-79
CATHODE 0.006 (0.15 mm) MIN.
INDICATOR
0.010
(0.25 mm) MIN.
0.014
(0.35 mm) MAX.
1
2
0.045 (1.15 mm) MIN.
0.053 (1.35 mm) MAX.
1
2
0.028
(0.70 mm) MIN.
0.035
(0.90 mm) MAX.
CATHODE
INDICATOR
0.060 (1.50 mm) MIN.
0.067 (1.70 mm) MAX.
0.043 (1.10 mm) MIN.
0.051 (1.30 mm) MAX.
0.008 (0.20 mm) NOM.
0.006
(0.15 mm) TYP.
0.050
(1.25 mm) MAX.
10˚ MAX.
0.003
(0.07 mm) MIN.
0.008
(0.20 mm) MAX.
10˚ MAX.
0.004 (0.10 mm) MAX.
0.010 (0.25 mm) MIN.
0.020
(0.50 mm) MIN.
0.028
(0.70 mm) MAX.
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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