Abrupt Junction Tuning Varactors
SMV1405–SMV1419
Features
s
High Q
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
SPICE Models are Available
Description
The SMV1405–SMV1419 series of silicon abrupt junction
varactor diodes are designed for use in VCOs requiring tight
capacitance tolerances. The low resistance of these
varactors makes them appropriate for high Q resonators
in wireless system VCOs to frequencies beyond 2.5 GHz.
The devices are characterized for capacitance 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
30 V
20 mA
250 mW
-55°C to +150°C
-55°C to +125°C
Single
SC-79
o
SMV1405-079
Single
SOT-23
o
SMV1405-001
o
SMV1408-001
o
SMV1411-001
o
SMV1413-001
o
SMV1417-001
o
SMV1419-001
Common Cathode
SOT-23
Common Cathode
SC-70
o
SMV1405-074
o
SMV1417-004
L
S
= 0.7 nH
L
S
= 1.5 nH
L
S
= 1.5 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. 1/01A
1
Abrupt Junction Tuning Varactors
SMV1405–SMV1419
Electrical Specifications at 25°C
Part
Number
SMV1405
SMV1408
SMV1411
SMV1413
SMV1417
SMV1419
Reverse Voltage V
R
(I
R
= 10
µA):
30 V
Reverse Current I
R
(V
R
= 24 V): 20 nA
C
T
@ 0.5 V
(pF)
Typ.
2.1
3.4
6.0
7.4
15.3
18.7
C
T
@ 1V
(pF)
Typ.
1.8
2.9
5.2
6.4
13.2
16.6
Min.
1.21
1.75
3.10
3.64
7.51
9.13
C
T
@ 4 V
(pF)
Max.
1.45
2.11
3.76
4.42
9.15
11.13
C
T
@ 0 V
C
T
@ 30 V
(Ratio)
Min.
4.1
4.1
4.2
4.2
4.3
4.4
R
S
@ 4 V
500 MHz
Ω
(Ω)
Max.
0.80
0.60
0.40
0.35
0.22
0.20
Q
@ 4V
50 MHz
Typ.
3200
2900
2500
2400
1800
1600
Typical Performance Data
100.0
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-40
Percentage Change (%)
V
R
= 4 V
V
R
= 30 V
Capacitance (pF)
10.0
SMV1413
SMV1417
SMV1419
SMV1411
1.0
SMV1405
SMV1408
V
R
= 1 V
0.1
0
5
10
15
20
25
30
-20
0
20
40
60
80
Reverse Voltage (V)
Temperature (˚C)
Capacitance vs. Reverse Voltage
Relative Capacitance Change
vs. Temperature
Typical Capacitance Values
SMV1405
V
R
(V)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
4.0
5.0
10.0
20.0
30.0
C
T
(pF)
2.67
2.12
1.84
1.70
1.55
1.44
1.34
1.25
1.17
0.95
0.77
0.63
SMV1408
C
T
(pF)
4.08
3.36
2.94
2.60
2.38
2.24
2.08
1.88
1.72
1.28
1.01
0.95
SMV1411
C
T
(pF)
7.58
6.05
5.21
4.66
4.27
4.00
3.72
3.35
3.08
2.32
1.69
1.48
SMV1413
C
T
(pF)
9.24
7.39
6.37
5.71
5.22
4.85
4.55
4.10
3.77
2.85
2.12
1.77
SMV1417
C
T
(pF)
19.20
15.30
13.16
11.76
10.74
9.95
9.32
8.35
7.64
5.62
4.09
3.79
SMV1419
C
T
(pF)
23.44
18.72
16.64
14.38
13.14
12.18
11.42
10.26
9.40
7.00
5.10
4.30
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
Abrupt Junction Tuning Varactors
SMV1405–SMV1419
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
SC-70
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.
3
0.045 (1.15 mm) MIN.
0.053 (1.35 mm) MAX.
1
0.014 (0.35 mm) REF.
2
0.026 (0.65 mm) REF.
RES
R
S
R = R
S
DIODE
Varactor_Diode
AREA = 1
MODEL = Diode_Model
MODE = nonlinear
CAP
C
P
C = C
P
0.051 (1.30 mm) REF.
0.004 (0.10 mm) MIN.
0.007 (0.18 mm) MAX.
0.031 (0.80 mm) MIN.
0.039 (1.00 mm) MAX.
0.004 (0.10 mm) MIN.
0.012 (0.30 mm) MAX.
0.000 (0.00 mm) MIN.
0.004 (0.10 mm) MAX.
PORT
P_Cathode
port = 2
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.
Part
Number
SMV1405
SMV1408
SMV1411
SMV1413
SMV1417
SMV1419
C
JO
(pF)
2.92
3.70
7.57
9.20
19.20
23.40
V
J
(V)
0.68
0.80
0.80
0.79
0.84
0.87
M
0.41
0.48
0.45
0.45
0.48
0.54
C
P
(pF)
0.05
0.13
0.13
0.13
0.13
0.13
R
S
Ω
(Ω)
0.80
0.60
0.40
0.35
0.22
0.20
0.045 (1.15 mm) MIN.
0.053 (1.35 mm) MAX.
1
2
CATHODE
INDICATOR
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.
0.008 (0.20 mm) NOM.
0.006
(0.15 mm) TYP.
0.050
(1.25 mm) MAX.
0.004 (0.10 mm) MAX.
SOT-23
0.110 (2.80 mm) MIN.
0.120 (3.04 mm) MAX.
3
0.010 (0.25 mm) MIN.
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
SC-79
CATHODE 0.006 (0.15 mm) MIN.
INDICATOR
0.010
(0.25 mm) MIN.
0.014
(0.35 mm) MAX.
1
2
0.083 (2.10 mm) MIN.
0.104 (2.64 mm) MAX.
0.037 (0.95 mm) REF.
0.020 (0.51 mm) REF.
0.076 (1.92 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.
0.028
(0.70 mm) MIN.
0.035
(0.90 mm) MAX.
0.060 (1.50 mm) MIN.
0.067 (1.70 mm) MAX.
0.043 (1.10 mm) MIN.
0.051 (1.30 mm) MAX.
0.020
(0.50 mm) MIN.
0.028
(0.70 mm) MAX.
10˚ MAX.
0.022 (0.55 mm) REF.
0.0005 (0.01 mm) MIN.
0.004 (0.10 mm) MAX.
10˚ MAX.
0.003
(0.07 mm) MIN.
0.008
(0.20 mm) MAX.
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
