Low Capacitance Plastic Packaged PIN Diodes SMP1321 Series Features ■ Designed for High Performance Wireless Switch Applications ■ 0.25 pF Capacitance Specified ■ Multiple Package Configurations ■ Available in Tape and Reel Packaging Description The SMP1321 series of plastic packaged, surface mountable PIN diodes are designed for high volume switch applications from 10 MHz to beyond 2 GHz. The low capacitance of these diodes (0.25 pF) combined with its low resistance (2.0 Ω maximum at 10 mA) make the SMP1321 series particularly suited to high isolation series connected PIN diode switches in battery operated circuits. Available in a selection of plastic packages and in a variety of configurations including a low inductance (0.4 nH) SOT-23 (SMP1321-007), the small footprint SC-79 and the miniature SC-70. Absolute Maximum Ratings Characteristic Value Reverse Voltage (VR) 100 V Power Dissipation @ 25°C Lead Temperature (PD) 250 mW Storage Temperature (TST) -65°C to +150°C Operating Temperature (TOP) -65°C to +150°C ESD Human Body Model Class 1B Single Common Anode Common Cathode Series Pair Low Inductance Marking: PM1 Marking: PM9 Marking: PM3 Marking: PM2 Marking: PMB SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOD-323 SC-79 ♦ SMP1321-001 ♦ SMP1321-003 ♦ SMP1321-004 ♦ SMP1321-005 ♦ SMP1321-007 ♦ SMP1321-011 ♦ SMP1321-079 LS = 1.5 nH LS = 1.5 nH LS = 1.5 nH LS = 1.5 nH LS = 0.4 nH LS = 1.5 nH LS = 0.7 nH Max. Unit 10 µA 0.25 pF SC-70 SC-70 SC-70 ♦ SMP1321-073 ♦ SMP1321-074 ♦ SMP1321-075 LS = 1.4 nH LS = 1.4 nH LS = 1.4 nH Single Single ♦ Available through distribution. Electrical Specifications at 25°C Parameter Condition Typ. Reverse Current (IR) Capacitance (CT) VR = 100 V Resistance (RS) F = 100 MHz, I = 1 mA Resistance (RS) Forward Voltage (VF) F = 100 MHz, I = 10 mA IF = 10 mA 0.85 Carrier Lifetime (TI) IF = 10 mA 0.4 µS 15 µm I Region Width F = 1 MHz, V = 30 V Ω 3.0 2.0 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 Low Capacitance Plastic Packaged PIN Diodes SMP1321 Series Typical Performance Data 100 Forward Current (mA) Series Resistance (Ω) 100 10 1 0.1 0.01 0.1 1 10 1 0.1 0.01 400 100 500 600 700 800 Forward Voltage (mV) Series Resistance vs. Current @ 100 MHz DC Characteristic 0.8 800 0.7 700 0.6 600 Conductance (µS) Capacitance (pF) Forward Current (mA) 0.5 0.4 1 MHz–1 GHz 0.3 0.2 200 0 5 10 20 50 0V 300 0 2 10 V 40 V 0 500 1000 1500 Reverse Voltage (V) Frequency (MHz) Capacitance vs. Reverse Voltage Conductance vs. Frequency and Reverse Voltage Resistance vs. Temperature @ 500 MHz IF (mA) R -55°C Ω) (Ω R -15°C Ω) (Ω R +25°C Ω) (Ω R +65°C Ω) (Ω R +100°C Ω) (Ω 0.02 47.400 50.000 56.300 61.500 65.100 0.10 12.000 12.600 13.900 15.400 16.400 0.30 5.200 5.400 5.800 6.400 6.900 0.50 3.600 3.800 4.100 4.500 4.800 1.00 2.400 2.500 2.600 2.800 3.100 10.00 1.030 1.040 1.040 1.070 1.150 20.00 0.871 0.888 0.873 0.889 0.956 100.00 0.669 0.659 0.642 0.645 0.695 1000 400 100 1 900 500 0.1 0 2 10 2000 SMP1321-007 In the -007 configuration of the SOT-23 package, the package inductance is effectively reduced to 0.4 nH, in comparison to the 1.5 nH value of the standard configuration. This lower inductance will be particularly beneficial when the diodes are used as shunt connected switches at frequencies higher than 500 MHz, where inductance is the primary limitation on maximum switch isolation. To achieve the effective 0.4 nH, the SOT-23 package must be inserted in the microstrip circuit board with a gap in the trace, as shown in the Gap figure. Because of the polarity of the diode junction, this low inductance feature is only realizable with the cathode connected to Ground ground. Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 1/01A Low Capacitance Plastic Packaged PIN Diodes SOT-23 SMP1321 Series SC-70 0.110 (2.80 mm) MIN. 0.120 (3.04 mm) MAX. 0.071 (1.80 mm) MIN. 0.087 (2.20 mm) MAX. 0.012 (0.30 mm) MIN. 0.020 (0.50 mm) MAX. 3 0.083 (2.10 mm) MIN. 0.104 (2.64 mm) MAX. 0.047 (1.20 mm) MIN. 0.055 (1.40 mm) MAX. 2 1 0.010 (0.25 mm) MIN. 0.016 (0.40 mm) MAX. 3 0.071 (1.80 mm) MIN. 0.094 (2.40 mm) MAX. 0.045 (1.15 mm) MIN. 0.053 (1.35 mm) MAX. 1 0.037 (0.95 mm) REF. 0.020 (0.51 mm) REF. 2 0.014 (0.35 mm) REF. 0.026 (0.65 mm) REF. 0.076 (1.92 mm) REF. 0.051 (1.30 mm) REF. 0.035 (0.89 mm) MIN. 0.044 (1.12 mm) MAX. 0.003 (0.080 mm) MIN. 0.008 (0.20 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. 8˚ MAX. 0.0005 (0.01 mm) MIN. 0.004 (0.10 mm) MAX. 0.022 (0.55 mm) REF. SOD-323 0.004 (0.10 mm) MIN. 0.012 (0.30 mm) MAX. 0.000 (0.00 mm) MIN. 0.004 (0.10 mm) MAX. SC-79 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 CATHODE 0.006 (0.15 mm) MIN. INDICATOR 0.010 (0.25 mm) MIN. 0.014 (0.35 mm) MAX. 0.063 (1.60 mm) MIN. 0.071 (1.80 mm) MAX. 0.028 (0.70 mm) MIN. 0.035 (0.90 mm) MAX. 0.043 (1.10 mm) MIN. 0.051 (1.30 mm) MAX. 0.050 (1.25 mm) MAX. 0.004 (0.10 mm) MAX. 0.010 (0.25 mm) MIN. 2 0.060 (1.50 mm) MIN. 0.067 (1.70 mm) MAX. 0.008 (0.20 mm) NOM. 0.006 (0.15 mm) TYP. 1 0.020 (0.50 mm) MIN. 0.028 (0.70 mm) MAX. 10˚ MAX. 0.003 (0.07 mm) MIN. 0.008 (0.20 mm) MAX. 10˚ MAX. Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 1/01A 3