Hyperabrupt Tuning Varactors
SMV1247–SMV1255
Features
I
High Capacitance Ratio,
C
0.3 V
/C
4.7 V
= 12 Typ.
I
Multiple Packages SOT-23, SOD-323,
SC-70 and SC-79
I
Designed for High Volume Commercial
Applications
I
SPICE Models are Available
Description
The SMV1247–SMV1255 series of silicon hyperabrupt
junction varactor diodes are designed for use in VCOs with
low tuning voltage operation. 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
15 V
20 mA
250 mW
-55°C to +150°C
-55°C to +125°C
Single
SC-79
o
SMV1247-079
Single
SOD-323
Single
SOT-23
o
SMV1248-001
Common Anode
SOT-23
Common Cathode
SOT-23
Common Anode
SC-70
Common Cathode
SC-70
o
SMV1247-074
o
SMV1249-079
o
SMV1251-079
o
SMV1253-079
o
SMV1255-079
L
S
= 0.7 nH
o
SMV1249-011
o
SMV1251-011
o
SMV1255-011
L
S
= 1.5 nH
o
SMV1249-001
o
SMV1251-001
o
SMV1255-001
L
S
= 1.5 nH
o
SMV1249-003
o
SMV1251-004
o
SMV1253-004
o
SMV1255-003
L
S
= 1.5 nH
o
SMV1255-004
L
S
= 1.5 nH
o
SMV1249-073
o
SMV1251-074
o
SMV1255-073
L
S
= 1.4 nH
L
S
= 1.4 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. 1/00A
1
Hyperabrupt Tuning Varactors
SMV1247–SMV1255
Electrical Specifications at 25°C
Part
Number
SMV1247
SMV1248
SMV1249
SMV1251
SMV1253
SMV1255
6.5
15.0
28.0
38.0
48.0
58.0
C
T
@ 0.3 V
(pF)
Min.
Typ.
7
17
31
42
53
64
0.7
1.5
2.6
3.4
4.3
5.2
C
T
@ 4.7 V
(pF)
Typ.
Max.
0.78
1.70
2.80
3.80
4.80
5.80
C
T
@ 1V
(pF)
Typ.
4.4
12.3
18.2
28.1
37.0
43.3
C
T
@ 3V
(pF)
Typ.
0.95
2.60
3.40
5.80
7.80
8.50
C
T
@ 0.3 V
C
T
@ 4.7 V
(Ratio)
Min.
9.5
10.8
11.0
11.0
11.0
11.0
Typ.
10.0
12.0
12.1
12.2
12.3
12.3
C
T
@ 1 V R
S
@ 3 V
C
T
@ 3 V 500 MHz
Ω
(Ratio)
(Ω)
Typ.
4.6
4.7
5.3
4.8
4.7
5.1
Max.
2.0
1.8
1.5
1.3
1.2
1.0
Q
@ 3V
50 MHz
Typ.
1500
700
600
400
350
350
Reverse Voltage V
R
(I
R
= 10
µA):
15 V
Reverse Current I
R
(V
R
= 12 V): 20 nA
Typical Performance Data
100.0
SMV1255
SMV1253
4.0
3.5
3.0
2.5
SMV1247
SMV1248
SMV1249
SMV1251
Capacitance (pF)
10.0
SMV1251
R
S
(Ω)
SMV1249
2.0
1.5
1.0
1.0
SMV1248
SMV1247
0.1
0
2.0
4.0
6.0
8.0
0.5
0
0
1
2
SMV1253
SMV1255
3
4
5
Reverse Voltage (V)
Reverse Voltage (V)
Capacitance vs. Reverse Voltage
Series Resistance vs. Reverse Voltage
@ 500 MHz
15
3
Percentage Change (%)
2
1
0
-1
-2
-3
-40
-20
0
V
R
= 1 V
Percentage Change (%)
10
5
0
-5
-10
-15
-20
-25
-50
-25
0
25
50
75
100
V
R
= 4 V
20
40
60
80
Temperature (˚C)
Temperature (˚C)
Relative Capacitance Change
vs. Temperature
Relative Series Resistance Change
vs. Temperature @ 500 MHz
2
Alpha Industries, Inc.
[781] 935-5150
•
Fax
[617] 824-4579
•
Email
sales@alphaind.com
•
www.alphaind.com
Specifications subject to change without notice. 1/00A
Hyperabrupt Tuning Varactors
SMV1247–SMV1255
Typical Capacitance Values
SMV1247
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
C
T
(pF)
8.86
6.17
4.37
2.96
1.88
1.22
0.95
0.83
0.77
0.73
0.70
0.68
0.67
0.66
0.65
0.64
0.64
SMV1248
C
T
(pF)
22.62
16.32
12.33
9.12
6.27
3.93
2.57
1.95
1.71
1.59
1.49
1.44
1.40
1.36
1.33
1.31
1.30
SMV1249
C
T
(pF)
37.35
25.88
18.18
12.08
7.27
4.44
3.40
2.96
2.72
2.51
2.38
2.30
2.24
2.19
2.14
2.09
2.03
SMV1251
C
T
(pF)
53.65
38.23
28.09
20.13
13.55
8.60
5.78
4.57
3.95
3.58
3.33
3.16
3.03
2.94
2.88
2.83
2.79
SMV1253
C
T
(pF)
69.32
50.23
37.07
27.57
19.37
12.39
7.77
5.77
4.86
4.34
4.01
3.78
3.62
3.50
3.41
3.34
3.28
SMV1255
C
T
(pF)
81.21
58.28
43.27
31.49
21.50
13.40
8.51
6.51
5.58
5.07
4.76
4.58
4.46
4.39
4.33
4.29
4.26
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
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
SMV1247
SMV1248
SMV1249
SMV1250
SMV1251
SMV1253
SMV1255
C
JO
(pF)
9.22
21.54
39.00
47.00
60.00
70.00
82.00
V
J
(V)
13
17
17
17
17
17
17
M
10.5
14.0
14.0
14.0
14.0
14.0
14.0
C
P
(pF)
0
0
0
0
0
0
0
R
S
Ω
(Ω)
2.0
1.8
1.5
1.5
1.3
1.2
1.0
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. 1/00A
3
Hyperabrupt Tuning Varactors
SMV1247–SMV1255
SOT-23
0.110 (2.80 mm) MIN.
0.120 (3.04 mm) MAX.
3
SC-70
0.012 (0.30 mm) MIN.
0.020 (0.50 mm) MAX.
0.047 (1.20 mm) MIN.
0.055 (1.40 mm) MAX.
1
2
0.071 (1.80 mm) MIN.
0.087 (2.20 mm) MAX.
0.010 (0.25 mm) MIN.
0.016 (0.40 mm) MAX.
0.071 (1.80 mm) MIN.
0.094 (2.40 mm) MAX.
0.083 (2.10 mm) MIN.
0.104 (2.64 mm) MAX.
3
0.045 (1.15 mm) MIN.
0.053 (1.35 mm) MAX.
0.037 (0.95 mm) REF.
0.020 (0.51 mm) REF.
0.076 (1.92 mm) REF.
1
0.014 (0.35 mm) REF.
2
0.026 (0.65 mm) REF.
0.051 (1.30 mm) REF.
0.003 (0.080 mm) MIN.
0.008 (0.20 mm) MAX.
8˚ MAX.
0.035 (0.89 mm) MIN.
0.044 (1.12 mm) MAX.
0.004 (0.10 mm) MIN.
0.007 (0.18 mm) MAX.
0.031 (0.80 mm) MIN.
0.039 (1.00 mm) MAX.
0.022 (0.55 mm) REF.
0.0005 (0.01 mm) MIN.
0.004 (0.10 mm) MAX.
0.004 (0.10 mm) MIN.
0.012 (0.30 mm) MAX.
0.000 (0.00 mm) MIN.
0.004 (0.10 mm) MAX.
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.
0.004 (0.10 mm) MAX.
0.010 (0.25 mm) MIN.
10˚ MAX.
0.003
(0.07 mm) MIN.
0.008
(0.20 mm) MAX.
10˚ MAX.
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. 1/00A
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