Hyperabrupt Tuning Varactors
SMV1232–SMV1237
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
Description
The SMV1232–SMV1237 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 SMV1232–SMV1237 series is fully characterized for
capacitance and resistance over temperature. SPICE model
is 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
)
ESD Human Body Model
Value
15 V
20 mA
250 mW
-55°C to +150°C
-55°C to +125°C
Class 1B
Single
SC-79
o
SMV1232-079
o
SMV1233-079
o
SMV1234-079
o
SMV1235-079
o
SMV1236-079
L
S
= 0.7 nH
Single
SOD-323
o
SMV1232-011
o
SMV1233-011
o
SMV1234-011
o
SMV1235-011
o
SMV1236-011
L
S
= 1.5 nH
Single
SOT-23
o
SMV1233-001
o
SMV1234-001
o
SMV1235-001
o
SMV1236-001
o
SMV1237-001
L
S
= 1.5 nH
Common Anode
SOT-23
o
SMV1233-003
o
SMV1234-003
Common Cathode
SOT-23
o
SMV1233-004
o
SMV1234-004
o
SMV1235-004
o
SMV1236-004
o
SMV1237-004
Common Anode
SC-70
o
SMV1233-073
o
SMV1234-073
Common Cathode
SC-70
o
SMV1232-074
o
SMV1233-074
o
SMV1234-074
o
SMV1235-074
o
SMV1236-074
L
S
= 1.5 nH
L
S
= 1.5 nH
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. 6/99A
1
Hyperabrupt Tuning Varactors
SMV1232–SMV1237
Electrical Specifications at 25°C
Part
Number
SMV1232
SMV1233
SMV1234
SMV1235
SMV1236
SMV1237
C
T
@ 1 V
(pF)
Min.
2.34
3.00
5.85
10.35
15.50
45.00
Max.
2.86
3.60
7.15
12.65
18.50
54.00
C
T
@ 3V
(pF)
Typ.
1.5
1.8
3.6
6.4
9.2
26.9
C
T
@ 6V
(pF)
Typ.
0.94
1.10
2.00
3.60
5.30
14.40
C
T
@ 1 V
C
T
@ 3 V
(Ratio)
Min.
1.5
1.5
1.6
1.6
1.6
1.6
Max.
1.9
1.9
2.0
2.0
2.0
2.0
C
T
@ 1 V
C
T
@ 6 V
(Ratio)
Min.
2.6
2.6
2.8
2.9
3.0
3.0
Max.
3.3
3.3
3.4
3.4
3.5
3.5
R
S
@ 3 V
500 MHz
Ω
(Ω)
Max.
1.50
1.20
0.80
0.60
0.50
0.25
Q
@ 3V
50 MHz
Typ.
1400
1200
1000
750
700
500
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
SMV1237
SMV1236
2
SMV1232
SMV1233
SMV1234
SMV1235
Capacitance (pF)
10.0
R
S
(Ω)
1.0
SMV1235
SMV1234
SMV1233
0.1
0
2.0
4.0
6.0
8.0
SMV1232
1
SMV1236
SMV1237
0
0
1
2
3
4
5
Reverse Voltage (V)
Reverse Voltage (V)
Capacitance vs. Reverse Voltage
Series Resistance vs. Reverse Voltage
@ 500 MHz
10
5
Percentage Change (%)
3
2
1
0
-1
-2
-3
-4
-40
-20
0
20
40
60
80
V
R
= 3 V
V
R
= 1 V
Percentage Change (%)
4
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 @ 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. 6/99A
Hyperabrupt Tuning Varactors
SMV1232–SMV1237
Typical Capacitance Values
SMV1232
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
9.0
10.0
11.0
12.0
13.0
14.0
15.0
C
T
(pF)
4.15
3.22
2.67
2.28
1.97
1.72
1.51
1.35
1.22
1.13
1.05
0.99
0.94
0.90
0.86
0.84
0.81
0.78
0.76
0.75
0.74
0.73
0.73
0.72
SMV1233
C
T
(pF)
5.08
3.95
3.28
2.80
2.41
2.09
1.82
1.62
1.45
1.33
1.24
1.16
1.10
1.05
1.01
0.98
0.96
0.92
0.90
0.88
0.87
0.86
0.85
0.84
SMV1234
C
T
(pF)
9.63
7.53
6.28
5.39
4.68
4.09
3.58
3.15
2.81
2.54
2.32
2.15
2.02
1.90
1.80
1.72
1.65
1.55
1.47
1.42
1.38
1.35
1.33
1.32
SMV1235
C
T
(pF)
18.22
14.12
11.67
9.91
8.52
7.36
6.40
5.62
4.99
4.50
4.11
3.80
3.55
3.34
3.17
3.03
2.91
2.73
2.61
2.53
2.47
2.43
2.40
2.38
SMV1236
C
T
(pF)
26.75
20.61
17.02
14.38
12.29
10.56
9.16
8.04
7.19
6.53
6.01
5.61
5.28
5.02
4.81
4.64
4.49
4.28
4.13
4.02
3.95
3.89
3.84
3.80
SMV1237
C
T
(pF)
71.82
56.10
46.89
40.33
35.13
30.71
26.87
23.57
20.83
18.62
16.87
15.48
14.36
13.46
12.72
12.11
11.61
10.87
10.38
10.06
9.84
9.68
9.56
9.47
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
SMV1232
SMV1233
SMV1234
SMV1235
SMV1236
SMV1237
C
JO
(pF)
4.20
4.12
8.75
16.13
21.63
66.16
V
J
(V)
1.7
1.7
2.3
8.0
8.0
10.0
M
0.9
0.9
1.1
4.0
4.2
5.3
C
P
(pF)
0.0
0.7
1.2
2.0
3.2
9.0
R
S
Ω
(Ω)
1.50
1.20
0.80
0.60
0.50
0.25
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. 6/99A
3
Hyperabrupt Tuning Varactors
SMV1232–SMV1237
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.
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. 6/99A
