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Hyperabrupt Junction Tuning Varactors
SMV1129 and SMV1139 Features
I High Q I Low Series Resistance for Low Phase Noise I Multiple Packages SOD-323, SC-79 and SC-70 I Designed for High Volume Commercial Applications I SPICE Models are Available
Description
The SMV1129 and SMV1139 silicon hyperabrupt junction varactor diodes are designed for use in VCOs requiring low resistance. The low resistance of these varactors makes them appropriate for high Q resonators in wireless system VCOs to frequencies beyond 2.5 GHz.
Absolute Maximum Ratings
Characteristic Forward Current (IF) Power Dissipation (PD) Storage Temperature (TST) Operating Temperature (TOP) Value 20 mA 250 mW -55C to +150C -55C to +125C
Single SOD-323 o SMV1129-011 o SMV1139-011 LS = 1.5 nH
o Available through distribution. For other packages or configurations, please contact the factory.
Single SC-79 o SMV1129-079 o SMV1139-079 LS = 0.7 nH
Common Anode SC-70 SMV1129-073 LS = 1.4 nH
Electrical Specifications at 25C
Part Number Min. SMV1129 SMV1139
Reverse Voltage VR (IR = 10 A): 12 V Reverse Current IR (VR = 10 V): 20 nA
CT @ 1 V (pF) Typ. 19.0 5.4 Max. 20.50 5.85 17.50 4.95 1.4 1.4
CT @ 1 V CT @ 3 V (Ratio) Min. Typ. 1.53 1.53 Min. 2.0 2.0
CT @ 1 V CT @ 6 V (Ratio) Typ. 2.5 2.5
RS @ 1 V 500 MHz () Max. 0.4 0.6
Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com
Specifications subject to change without notice. 10/99A
1
Hyperabrupt Junction Tuning Varactors
SMV1129 and SMV1139
Typical Performance Data
30 25
Capacitance vs. Reverse Voltage
SMV1129 VR (V) 0 1 2 3 4 CT (pF) 27.5 18.9 15.0 12.5 10.7 9.3 8.1 7.1 6.3 5.7 5.2 4.9 4.7 SMV1139 CT (pF) 8.0 5.5 4.4 3.7 3.1 2.7 2.5 2.3 2.2 2.1 2.0 2.0 1.9
Capacitance (pF)
20 15 10 5 0 0 2 SMV1139 4 6 8 10
SMV1129
5 6 7 8 9 10 11 12
Reverse Voltage (V)
Capacitance vs. Reverse Voltage
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
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.
0.045 (1.15 mm) MIN. 0.053 (1.35 mm) MAX. 1
2
RES RS R = RS DIODE Varactor_Diode AREA = 1 MODEL = Diode_Model MODE = nonlinear
CAP CP C = CP
CATHODE INDICATOR
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.
PORT P_Cathode port = 2
SC-79
Part Number SMV1129 SMV1139 CJO (pF) 27.5 8.0 VJ (V) 2.8 1.2 M 1.10 0.65 CP (pF) 0 0 RS () 0.40 0.60
0.010 (0.25 mm) MIN. 0.014 (0.35 mm) MAX. CATHODE 0.006 (0.15 mm) MIN. INDICATOR
1 2
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.
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.
10 MAX. 0.003 (0.07 mm) MIN. 0.008 (0.20 mm) MAX.
2
Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com
Specifications subject to change without notice. 10/99A
Hyperabrupt Junction Tuning Varactors
SMV1129 and SMV1139
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.
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.
Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com
Specifications subject to change without notice. 10/99A
3

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