Hyperabrupt Tuning Varactors
SMV1232–SMV1237
Typical Capacitance Values
VR (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
SMV1232
CT (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
CT (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
CT (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
CT (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
CT (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
CT (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
IND
LS
L = LS
RES
RS
R = RS
DIODE
Varactor_Diode
AREA = 1
MODEL = Diode_Model
MODE = nonlinear
PORT
P_anode
port = 1
CAP
CP
C = CP
PORT
P_Cathode
port = 2
DIODEM
Diode_Model
IS = 1.00e-14
RS = 0
N=1
TT = 0
CJO = CJO
M=M
EG = 1.11
XTI = 3
KF =0
AF =1
FC = 0.5
BV = 0
IBV = 1e-3
ISR = 0
NR = 2
IKF = 0
NBV = 1
IBVL = 0
NBVL = 1
TBV1 = 0
TNOM = 27
FFE = 1
Part
CJO
VJ
Number (pF)
(V)
M
CP
RS
(pF)
(Ω)
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
1. Values extracted from measured performance.
2. For package inductance (LS) refer to package type.
3. For more details refer to the “Varactor SPICE Models for RF VCO
Applications” Application Note.
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