Hyperabrupt Junction Tuning Varactor SMV1281-011 Features ■ High Tuning Ratio ■ SOD-323 Package ■ Designed for High Volume, Low Cost Applications ■ Available in Tape and Reel Packaging Description The SMV1281-011 is a surface mount varactor diode in the SOD-323 plastic package. It is designed for very high capacitance tuning ratio while having low series resistance, which makes this device especially attractive for wideband VCO applications. Absolute Maximum Ratings Characteristic Value Forward Current (IF) 20 mA Power Dissipation (PD) 250 mW Storage Temperature (TST) -55°C to +150°C Operating Temperature (TOP) -55°C to +125°C Electrical Specifications at 25°C Parameter Condition Min. Typ. Max. Unit Reverse Current (IR) VR = 20 V 20.0 nA Capacitance (CT) 1V 7.8 8.6 9.5 pF Capacitance (CT) 20 V 0.6 0.7 0.8 pF Capacitance Ratio (CTR) 1 V/20 V Series Resistance (RS) VR = 1 V, F = 500 MHz Breakdown Voltage (VBR) IR = 10 µA 12.0 1.7 24.0 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 1/01A Ω V 1 Hyperabrupt Junction Tuning Varactor SMV1281-011 Typical Performance Data Capacitance vs. Reverse Voltage VR (V) CT (pF) 0 13.30 1 8.60 2 6.30 8 3 4.80 6 4 3.60 5 2.70 6 2.00 2 7 1.60 0 8 1.40 14 Capacitance (pF) 12 10 4 0 2 4 6 8 10 12 14 16 18 20 Reverse Voltage (V) Capacitance vs. Reverse Voltage 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. 1 0.010 (0.25 mm) MIN. 0.016 (0.40 mm) MAX. 2 CATHODE INDICATOR 0.063 (1.60 mm) MIN. 0.071 (1.80 mm) MAX. 0.008 (0.20 mm) NOM. 0.006 (0.15 mm) TYP. 9 1.20 10 1.10 11 1.00 12 0.94 13 0.89 14 0.85 15 0.81 16 0.78 17 0.75 18 0.73 19 0.71 20 0.69 SPICE Model 0.050 (1.25 mm) MAX. PORT P_anode port = 1 0.004 (0.10 mm) MAX. IND LS L = LS 0.010 (0.25 mm) MIN. RES RS R = RS CAP CP C = CP DIODE Varactor_Diode AREA = 1 MODEL = Diode_Model MODE = nonlinear PORT P_Cathode port = 2 2 DIODEM Diode_Model IS = 1.00e-14 RS = 0 N=1 TT = 0 CJO = CJO M=M VJ 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 CJ0 (pF) VJ (V) M CP (pF) RS Ω) (Ω LS (nH) SMV1281-011 13 14 6 0.62 1.7 1.2 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 1/01A