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Planar and Mesa Beam Lead PIN Diodes

DSG6405­000, DSG6474­000, DSM6300 Series

Planar and Mesa Beam Lead PIN Diodes
DSG6405-000, DSG6474-000, DSM6300 Series
Features
Low Capacitance Low Resistance Fast Switching Oxide-Nitride Passivated Stronger, Full Frame Design High Voltage
Maximum Ratings
Operating Temperature: Storage Temperature: Power Dissipation (Derate Linearly to Zero @ 175°C): Typical Lead Strength: -65 to + 150°C -65 to + 200°C 250 mW 8 Grams Pull
Description
Electrical Specifications at 25°C
Low Capacitance Planar Beam Lead Diodes
Part Number
Outline Drawing Number
Alpha Industries · 617 935 5150 · Fax 617 824 4579 · E-mail sales@alphaind.com · Visit our web site: www.alphaind.com
Planar and Mesa Beam Lead PIN Diodes DSG6405-000, DSG6474-000, DSM6300 Series
Performance Data for DSG6405-000
100 10K
Forward Current (mA)
RF Resistance (Ohms) 0.25 0.50 0.75 1.00 Forward Voltage (V) 1.25
1 0.1 1 10 Forward Bias Current (mA) 100
Figure 1. Typical Forward Characteristics
Figure 3. Typical RF Resistance vs. Forward Bias Current
0.06 Capacitance (pF) Isolation Loss (dB)
Insertion Loss (dB)
(10 Volts)
1 MHz Above 1 GHz
(20 mA)
0 0 10 20 Reverse Voltage (Volts) 30 0 5 15 18 20 10 Frequency (GHz) 25
Figure 2. Typical Capacitance vs. Reverse Bias Voltage
Figure 4. Typical Insertion Loss and Isolation Characteristics
Electrical Specifications at 25°C
Planar Beam Lead Diodes
Voltage Breakdown @ 10 mA Min. "DSG6474-000 200 Series Resistance (Ohms) (From Insertion Loss @ 3 GHz, 50 mA)1 Max. 4.0 Junction Capacitance CJ (pF) Max. 0.02 RF Switching Time TS (ns)2 25 Minority Carrier Lifetime (ns) Typ. 250 169-001
Part Number
Outline Drawing Number
" Available through distribution.
Alpha Industries · 617 935 5150 · Fax 617 824 4579 · E-mail sales@alphaind.com · Visit our web site: www.alphaind.com
Planar and Mesa Beam Lead PIN Diodes DSG6405-000, DSG6474-000, DSM6300 Series
Performance Data for DSG6474-000
Figures 5 and 6 show a single pole double-throw 1-18 GHz switch these diodes are mounted an Alumina, Duriod, or Teflon fiberglass 50 ohm microstrip circuits. Typical bonding methods include thermal compression bonding, parallel gap welding, and soldering. SPDT isolation curves are shown in Figure 6 and insertion loss in Figures 7 and 8. With proper transitions and bias circuits, VSWR is better than 2.0 to 1 through 18 GHz.
38 36 32 Isolation Loss (dB) 28 24 20 16 12 8 0 0 2 4 6 8 10 12 14 16 18 Frequency (GHz) DSG6474-000
Switching Considerations
The typical minority carrier lifetime of the DSG6474 diodes is 100 ns. With suitable drivers, the individual diodes can be switched from high impedance (off) to low RS (on) in about 10 ns.
Beam Lead Pin Duriod Substrate 50 Ohm Glass Bead
Figure 7. Isolation vs. Frequency, SPDT DSG6474-000
Figure 5. Typical SPDT Circuit Arrangement
2.0 Insertion Loss (dB) 1.5 1.0 DSG6474-000 0.5
Metal Conductor
Figure 6. Typical Beam Lead Mounting
Alpha Industries · 617 935 5150 · Fax 617 824 4579 · E-mail sales@alphaind.com · Visit our web site: www.alphaind.com
Beam Lead Pin 0.005"
50 Ohm Transmission Line
Connecting Lead 2.5
Preferred Beam Lead Orientation
0 0 10 50 Bias Current (mA) 100
Duroid
Figure 8. Diode Insertion Loss vs. Bias SPST, 18 GHz DSG6474-000
Planar and Mesa Beam Lead PIN Diodes DSG6405-000, DSG6474-000, DSM6300 Series Power Handling for DSG6474-000
Beam lead diodes are not suitable for high power operation because of high internal thermal impedance of about 600°C / Watt.
1.4 1.2 1.0 Isolation Loss (dB) 0.8 0.6 0.4 0.2 0 0 2 4 6 8 10 12 14 16 18 Frequency (GHz)
For pulsed operation, the total RF plus bias voltage must not exceed the rated breakdown. Alpha has made high power tests at 1 GHz with 1µs pulses, 0.001 duty, with 200V diodes. With 50 mA forward bias, there is no increase in insertion loss over the 0 dBm level with a peak power input of 50 watts. In the open state, reverse bias voltage is required to keep the diode from "rectifying, " with resultant decrease in isolation and possible failure. Figure 11 shows allowed peak power versus reverse bias at 1 GHz. At this frequency, the required reverse voltage is almost equal to the peak RF voltage at high frequency, the bias can be reduced somewhat. Experimentation is necessary.
100 80 Peak Power Watts 60 40 20 0 0 10 50 Reverse Bias (Volts) 100
Figure 9. Diode Insertion Loss vs. Frequency SPST, 50 mA Bias DSG6474-000
With maximum CW power dissipation of 250 mW, the DSG6474-000 diodes are normally rated at 2 Watt CW with linear derating between 25°C and 150°C. Figure 10 presents data on CW power handling as a function of bias and frequency.
0.4V 0.1V
Figure 11. Peak Power Handling, SPST, 1 GHz DSG6474-000
CW Power (Milliwatts)
1000 500 200 100 50 20 0.1 0.2 0.5 1.0 2.0 5.0 Frequency (GHz) 10 20
Figure 10. Typical Series Switch Behavior at Room Temperature and Biased at 50ma / 1V / 4V DSG6474-000
Alpha Industries · 617 935 5150 · Fax 617 824 4579 · E-mail sales@alphaind.com · Visit our web site: www.alphaind.com
Planar and Mesa Beam Lead PIN Diodes DSG6405-000, DSG6474-000, DSM6300 Series
Mesa Beam Lead Diode Specifications
Part Number
Low-Loss Ultra-Fast Beam Lead PIN Diodes DSM6361-000 60 0.0251 3.52 -- 25 389-003
" Available through distribution.
1. Capacitance Total @ 10 Volts, 1 MHz, pF, Max. 2. Series Resistance @ 10 mA, Ohms, Max., 100 MHz.
Part Number
Voltage Breakdown @ 10 µA, Reverse Current Min. Typ.
Series Resistance @ 50 MHz, 50 mA Typ. Max.
Capacitance Total @ -10V, 1 MHz Typ. Max.
Lifetime (ns) Typ.1
Switching Time (ns) Typ.2
Video Recovery Time (ns)2
Outline Drawing Number
Ultra Low Resistance High-Speed Beam Lead PIN Diodes DSM6356-000 30 50 1.2 1.5 0.12 0.15 30 5 2 389-003
Time (ns) 3 10
5 Attenuation (dB)
Mesa Beam Lead
Conventional Beam Lead
Figure 12. Switching Time Data
Alpha Industries · 617 935 5150 · Fax 617 824 4579 · E-mail sales@alphaind.com · Visit our web site: www.alphaind.com
Planar and Mesa Beam Lead PIN Diodes DSG6405-000, DSG6474-000, DSM6300 Series
Typical Characteristics for DSM6380-000 and DSM6381-000
DSM6381-000 DSM6380-000
Forward Current (mA)
Isolation (dB)
(10 mA)
0.001 0 2 4 6 8 Forward Voltage (V) 10 0 5 15 1820 10 Frequency (GHz) 25
Insertion Loss (dB)
(10 Volts)
Figure 13. Typical Forward Characteristics of the DSM6380-000
Figure 15. Typical Isolation and Insertion Loss Characteristics of the DSM6380-000 / 6381-000
100 20 RF Resistance (Ohms) 10
Capacitance (pF)
DSM6381-000 DSM6380-000
0.05 0.04 0.03 0.02 Above 1 GHz 0.01 0 10 20 Reverse Voltage (Volts) 30
1 1 1 10 Forward Bias Current (mA) 100
Figure 14. Typical Capacitance vs. Reverse Voltage for DSM6380-000
Figure 16. Typical RF Resistance vs. Forward Bias Current for DSM6380-000 and DSM6381-000
Alpha Industries · 617 935 5150 · Fax 617 824 4579 · E-mail sales@alphaind.com · Visit our web site: www.alphaind.com
Planar and Mesa Beam Lead PIN Diodes DSG6405-000, DSG6474-000, DSM6300 Series
Typical Characteristics for DSM6361-000
100 RF Resistance (Ohms)
Isolation (dB)
(10 mA) DSM6361-000
Insertion Loss (dB)
DSM6361-000
1 1 1 10 Forward Bias Current (mA) 100
15 18 20 10 Frequency (GHz)
Figure 17. Typical Isolation and Insertion Loss Characteristics of the DSM6361-000
Figure 19. Typical RF Resistance vs. Forward Bias Current for DSM6361-000
Capacitance (pF)
15 0.06 1 MHz 0.05 0.04 0.03 0.02 Above 1 GHz 0.01 0 10 20 Reverse Voltage (Volts) 30
Figure 18. Typical Capacitance vs. Reverse Voltage for DSM6361-000
Alpha Industries · 617 935 5150 · Fax 617 824 4579 · E-mail sales@alphaind.com · Visit our web site: www.alphaind.com
Planar and Mesa Beam Lead PIN Diodes DSG6405-000, DSG6474-000, DSM6300 Series
Typical Characteristics for DSM6356-000
100 10 Capacitance (pF) 0.20
Forward Current (mA)
DSM6356-000
DSM6356-000 1 MHz Above 1 GHz
0.001 0 0.2 0.4 0.6 0.8 Forward Voltage (V) 1.0
0.07 0 10 20 Reverse Voltage (Volts) 30
Figure 20. Typical Forward Characteristics
Figure 22. Typical Capacitance vs. Reverse Voltage
RF Resistance (Ohms)
DSM6356-000
1 1 1 10 Forward Bias Current (mA) 100
Figure 21. Typical RF Resistance vs. Forward Bias Current
Alpha Industries · 617 935 5150 · Fax 617 824 4579 · E-mail sales@alphaind.com · Visit our web site: www.alphaind.com
Planar and Mesa Beam Lead PIN Diodes DSG6405-000, DSG6474-000, DSM6300 Series
Outline Drawings
0.009 min 0.0115 max
0.014 max
0.0035 min 0.007 max
0.011 max
0.032 min 0.035 max
0.0002 min 0.0007 max 0.005 max
Alpha Industries · 617 935 5150 · Fax 617 824 4579 · E-mail sales@alphaind.com · Visit our web site: www.alphaind.com
Planar and Mesa Beam Lead PIN Diodes DSG6405-000, DSG6474-000, DSM6300 Series
Outline Drawings
0.009 min 0.0115 max
0.014 max
0.0035 min 0.007 max
0.011 max
0.032 min 0.035 max
0.0002 min 0.0007 max 0.005 max
Alpha Industries · 617 935 5150 · Fax 617 824 4579 · E-mail sales@alphaind.com · Visit our web site: www.alphaind.com