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Hyperabrupt Tuning Varactors
SMV1232-SMV1237 Features
s High Capacitance Ratio, C1 V/C3 V = 1.8, C1 V/C6 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 (VR) Forward Current (IF) Power Dissipation (PD) Storage Temperature (TST) Operating Temperature (TOP) ESD Human Body Model Value 15 V 20 mA 250 mW -55C to +150C -55C to +125C Class 1B
Single SC-79 o SMV1232-079 o SMV1233-079 o SMV1234-079 o SMV1235-079 o SMV1236-079 LS = 0.7 nH
Single SOD-323 o SMV1232-011 o SMV1233-011 o SMV1234-011 o SMV1235-011 o SMV1236-011 LS = 1.5 nH
Single SOT-23 o SMV1233-001 o SMV1234-001 o SMV1235-001 o SMV1236-001 o SMV1237-001 LS = 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
LS = 1.5 nH
LS = 1.5 nH
LS = 1.4 nH
LS = 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 25C
Part Number SMV1232 SMV1233 SMV1234 SMV1235 SMV1236 SMV1237 CT @ 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 CT @ 3V (pF) Typ. 1.5 1.8 3.6 6.4 9.2 26.9 CT @ 6V (pF) Typ. 0.94 1.10 2.00 3.60 5.30 14.40 CT @ 1 V CT @ 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 CT @ 1 V CT @ 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 RS @ 3 V 500 MHz () 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 VR (IR = 10 A): 15 V Reverse Current IR (VR = 12 V): 20 nA
Typical Performance Data
100.0 SMV1237 SMV1236 2 SMV1232 SMV1233 SMV1234 SMV1235
Capacitance (pF)
10.0
RS ()
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 VR = 3 V VR = 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 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 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
PORT P_anode port = 1 IND LS L = LS 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 Number SMV1232 SMV1233 SMV1234 SMV1235 SMV1236 SMV1237
CJO (pF) 4.20 4.12 8.75 16.13 21.63 66.16
VJ (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
CP (pF) 0.0 0.7 1.2 2.0 3.2 9.0
RS () 1.50 1.20 0.80 0.60 0.50 0.25
RES RS R = RS DIODE Varactor_Diode AREA = 1 MODEL = Diode_Model MODE = nonlinear
CAP CP C = CP
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.
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.
0.004 (0.10 mm) MAX. 0.010 (0.25 mm) MIN.
10 MAX. 0.003 (0.07 mm) MIN. 0.008 (0.20 mm) MAX. 10 MAX.
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

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