Characteristic Value
Rev erse Voltage (VR) 15 V
Forward Current (IF) 20 mA
Power Dissipation (PD) 250 mW
Storage Temper ature (TST) -55°C to +150°C
Operating Temper ature (TOP) -55°C to +125°C
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 V aractors
Features
■High Capacitance Ratio,
C1 V/C3 V = 1.8, C1 V/C6 V = 3.1
■Low Series Resistance for Low
Phase Noise
■Multiple Packages SOT-23, SOD-323,
SC-70 and SC-79
■Designed for High Volume Commercial
Applications
■Full Characterization with SPICE Models
SMV1232–SMV1237
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 be yond 2.5 GHz.
The SMV1232–SMV1237 series is fully characterized f or
capacitance and resistance ov er temperature.SPICE model
is provided.
♦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
♦SMV1232-079 ♦SMV1232-011 ♦SMV1232-074
♦SMV1233-079 ♦SMV1233-011 ♦SMV1233-001 ♦SMV1233-003 ♦SMV1233-004 ♦SMV1233-073 ♦SMV1233-074
♦SMV1234-079 ♦SMV1234-011 ♦SMV1234-001 ♦SMV1234-003 ♦SMV1234-004 ♦SMV1234-073 ♦SMV1234-074
♦SMV1235-079 ♦SMV1235-011 ♦SMV1235-001 ♦SMV1235-004 ♦SMV1235-074
♦SMV1236-079 ♦SMV1236-011 ♦SMV1236-001 ♦SMV1236-004 ♦SMV1236-074
♦SMV1237-001 ♦SMV1237-004
LS= 0.7 nH LS= 1.5 nH LS= 1.5 nH LS= 1.5 nH LS= 1.5 nH LS= 1.4 nH LS= 1.4 nH
Hyperabrupt Tuning Varactors SMV1232–SMV1237
2Alpha 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 8.04.0
Reverse Voltage (V)
Capacitance vs. Reverse Voltage
2.00
Capacitance (pF)
SMV1237
SMV1236
SMV1235
SMV1234 SMV1233 SMV1232
-4
-3
-2
-1
0
1
2
3
4
5
-40 -20 0 20 40 60 80
Percentage Change (%)
Temperature (˚C)
Relative Capacitance Change
vs. Temperature
VR = 1 V
VR = 3 V
10
8
6
4
2
0
-2
-4
-6
-8-40 -20 0 20 40 60 80
Percentage Change (%)
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
RS (Ω)
SMV1232 SMV1233 SMV1234
SMV1235
SMV1237
SMV1236
Typical Performance Data
CTCTCT@ 1 V CT@ 1 V RS@ 3 V Q
Part CT@ 1 V @ 3 V @ 6 V CT@ 3 V CT@ 6 V 500 MHz @ 3 V
Number (pF) (pF) (pF) (Ratio) (Ratio) (ΩΩ) 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 25°C
Reverse Voltage VR(IR= 10 µA): 15 V
Reverse Current IR(VR= 12 V): 20 nA
Hyperabrupt Tuning Varactors SMV1232–SMV1237
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 CJO VJM CPRS
Number (pF) (V) (pF) (ΩΩ)
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
VR(V) CT(pF) CT(pF) CT(pF) CT(pF) CT(pF) CT(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
RS
R = RS
IND
LS
L = LS
CAP
CP
C = CP
PORT
P_anode
port = 1
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
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.
Hyperabrupt Tuning Varactors SMV1232–SMV1237
4Alpha 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
21
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.
