Characteristic
Value
Reverse Voltage (V
R
)
15 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
ESD Human Body Model
Class 1B
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. 6/99A
Hyperabrupt Tuning Varactors
Features
s
High Capacitance Ratio,
C
1 V
/C
3 V
= 1.8, C
1 V
/C
6 V
= 3.1
s
Low Series Resistance for Low
Phase Noise
s
Multiple Packages SOT-23, SOD-323,
SC-70 and SC-79
s
Designed for High Volume Commercial
Applications
s
Full Characterization with SPICE Models
SMV1232SMV1237
Description
The SMV1232SMV1237 series of silicon hyperabrupt
junction varactor diodes are designed for use in VCOs with
low tuning voltage operation. The low resistance of these
varactors makes them appropriate for high Q resonators
in wireless system VCOs to frequencies beyond 2.5 GHz.
The SMV1232SMV1237 series is fully characterized for
capacitance and resistance over temperature. SPICE model
is provided.
o
Available through distribution.
For other packages or configurations, please contact the factory.
Single
Single
Single
Common Anode
Common Cathode
Common Anode
Common Cathode
SC-79
SOD-323
SOT-23
SOT-23
SOT-23
SC-70
SC-70
o
SMV1232-079
o
SMV1232-011
o
SMV1232-074
o
SMV1233-079
o
SMV1233-011
o
SMV1233-001
o
SMV1233-003
o
SMV1233-004
o
SMV1233-073
o
SMV1233-074
o
SMV1234-079
o
SMV1234-011
o
SMV1234-001
o
SMV1234-003
o
SMV1234-004
o
SMV1234-073
o
SMV1234-074
o
SMV1235-079
o
SMV1235-011
o
SMV1235-001
o
SMV1235-004
o
SMV1235-074
o
SMV1236-079
o
SMV1236-011
o
SMV1236-001
o
SMV1236-004
o
SMV1236-074
o
SMV1237-001
o
SMV1237-004
L
S
= 0.7 nH
L
S
= 1.5 nH
L
S
= 1.5 nH
L
S
= 1.5 nH
L
S
= 1.5 nH
L
S
= 1.4 nH
L
S
= 1.4 nH
Hyperabrupt Tuning Varactors
SMV1232SMV1237
2
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
Specifications subject to change without notice. 6/99A
0.1
10.0
1.0
100.0
6.0
8.0
4.0
Reverse Voltage (V)
Capacitance vs. Reverse Voltage
2.0
0
C
a
p
a
c
i
t
a
n
c
e
(
p
F
)
SMV1237
SMV1236
SMV1235
SMV1234
SMV1233
SMV1232
-4
-3
-2
-1
0
1
2
3
4
5
-40
-20
0
20
40
60
80
P
e
r
c
e
n
t
a
g
e
C
h
a
n
g
e
(
%
)
Temperature (C)
Relative Capacitance Change
vs. Temperature
V
R
= 1 V
V
R
= 3 V
10
8
6
4
2
0
-2
-4
-6
-8
-40
-20
0
20
40
60
80
P
e
r
c
e
n
t
a
g
e
C
h
a
n
g
e
(
%
)
Temperature (C)
Relative Series Resistance Change
vs. Temperature @ 500 MHz
0
1
2
Reverse Voltage (V)
Series Resistance vs. Reverse Voltage
@ 500 MHz
0
1
2
3
4
5
R
S
(
)
SMV1232
SMV1233
SMV1234
SMV1235
SMV1237
SMV1236
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.
SMV1232
2.34
2.86
1.5
0.94
1.5
1.9
2.6
3.3
1.50
1400
SMV1233
3.00
3.60
1.8
1.10
1.5
1.9
2.6
3.3
1.20
1200
SMV1234
5.85
7.15
3.6
2.00
1.6
2.0
2.8
3.4
0.80
1000
SMV1235
10.35
12.65
6.4
3.60
1.6
2.0
2.9
3.4
0.60
750
SMV1236
15.50
18.50
9.2
5.30
1.6
2.0
3.0
3.5
0.50
700
SMV1237
45.00
54.00
26.9
14.40
1.6
2.0
3.0
3.5
0.25
500
Electrical Specifications at 25C
Reverse Voltage V
R
(I
R
= 10
A): 15 V
Reverse Current I
R
(V
R
= 12 V): 20 nA
Hyperabrupt Tuning Varactors
SMV1232SMV1237
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
3
Specifications subject to change without notice. 6/99A
Part
C
JO
V
J
M
C
P
R
S
Number
(pF)
(V)
(pF)
(
)
SMV1232
4.20
1.7
0.9
0.0
1.50
SMV1233
4.12
1.7
0.9
0.7
1.20
SMV1234
8.75
2.3
1.1
1.2
0.80
SMV1235
16.13
8.0
4.0
2.0
0.60
SMV1236
21.63
8.0
4.2
3.2
0.50
SMV1237
66.16
10.0
5.3
9.0
0.25
Typical Capacitance Values
SPICE Model
SMV1232
SMV1233
SMV1234
SMV1235
SMV1236
SMV1237
V
R
(V)
C
T
(pF)
C
T
(pF)
C
T
(pF)
C
T
(pF)
C
T
(pF)
C
T
(pF)
0.0
4.15
5.08
9.63
18.22
26.75
71.82
0.5
3.22
3.95
7.53
14.12
20.61
56.10
1.0
2.67
3.28
6.28
11.67
17.02
46.89
1.5
2.28
2.80
5.39
9.91
14.38
40.33
2.0
1.97
2.41
4.68
8.52
12.29
35.13
2.5
1.72
2.09
4.09
7.36
10.56
30.71
3.0
1.51
1.82
3.58
6.40
9.16
26.87
3.5
1.35
1.62
3.15
5.62
8.04
23.57
4.0
1.22
1.45
2.81
4.99
7.19
20.83
4.5
1.13
1.33
2.54
4.50
6.53
18.62
5.0
1.05
1.24
2.32
4.11
6.01
16.87
5.5
0.99
1.16
2.15
3.80
5.61
15.48
6.0
0.94
1.10
2.02
3.55
5.28
14.36
6.5
0.90
1.05
1.90
3.34
5.02
13.46
7.0
0.86
1.01
1.80
3.17
4.81
12.72
7.5
0.84
0.98
1.72
3.03
4.64
12.11
8.0
0.81
0.96
1.65
2.91
4.49
11.61
9.0
0.78
0.92
1.55
2.73
4.28
10.87
10.0
0.76
0.90
1.47
2.61
4.13
10.38
11.0
0.75
0.88
1.42
2.53
4.02
10.06
12.0
0.74
0.87
1.38
2.47
3.95
9.84
13.0
0.73
0.86
1.35
2.43
3.89
9.68
14.0
0.73
0.85
1.33
2.40
3.84
9.56
15.0
0.72
0.84
1.32
2.38
3.80
9.47
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
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 Tuning Varactors
SMV1232SMV1237
4
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
Specifications subject to change without notice. 6/99A
SOT-23
3
2
1
0.035 (0.89 mm) MIN.
0.044 (1.12 mm) MAX.
0.0005 (0.01 mm) MIN.
0.004 (0.10 mm) MAX.
0.012 (0.30 mm) MIN.
0.020 (0.50 mm) MAX.
0.003 (0.080 mm) MIN.
0.008 (0.20 mm) MAX.
8 MAX.
0.022 (0.55 mm) REF.
0.110 (2.80 mm) MIN.
0.120 (3.04 mm) MAX.
0.083 (2.10 mm) MIN.
0.104 (2.64 mm) MAX.
0.037 (0.95 mm) REF.
0.047 (1.20 mm) MIN.
0.055 (1.40 mm) MAX.
0.076 (1.92 mm) REF.
0.020 (0.51 mm) REF.
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
SC-70
3
2
1
0.031 (0.80 mm) MIN.
0.039 (1.00 mm) MAX.
0.000 (0.00 mm) MIN.
0.004 (0.10 mm) MAX.
0.010 (0.25 mm) MIN.
0.016 (0.40 mm) MAX.
0.071 (1.80 mm) MIN.
0.087 (2.20 mm) MAX.
0.071 (1.80 mm) MIN.
0.094 (2.40 mm) MAX.
0.045 (1.15 mm) MIN.
0.053 (1.35 mm) MAX.
0.026 (0.65 mm) REF.
0.051 (1.30 mm) REF.
0.004 (0.10 mm) MIN.
0.007 (0.18 mm) MAX.
0.004 (0.10 mm) MIN.
0.012 (0.30 mm) MAX.
0.014 (0.35 mm) REF.
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