Both P-Type N-Type Barrier Silicon Available Noise Bonded Junctions Re
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Silicon Schottky Barrier Detector Diodes
Both P-Type N-Type Barrier Silicon Available Noise Bonded Junctions Reliability Planar Passivated Beam-Lead Chip Construction Also Zero Bias Silicon Schottky Barrier Detector Diodes
Description
Alpha packaged, beam-lead chip Schottky barrier detector diodes designed applications through Ka-band. They made deposition suitable barrier metal epitaxial silicon substrate form junction. process choice materials result series resistance along with narrow spread capacitance values close impedance control. P-type silicon used obtain superior noise characteristics. N-type silicon also available. packaged diodes suitable waveguide, coaxial, stripline applications. beam-lead chip diodes also mounted variety packages special customer substrates. Unmounted beam-lead diodes especially well suited applications. Mounted beam-lead diodes easily used MIC, stripline other such circuitry. "Universal Chips" designed high degree device reliability both commercial industrial uses. offset bond assures that mechanical damage will occur junction during wire bonding. Additionally bond eliminates performance variation bonding ideal automated assembly, improves efficiency during manual operations well. choice type silicon allows designer optimize silicon material intended application. Doppler mixers, high sensitivity detectors will benefit from using noise characteristics type silicon. conversion loss mixers biased detectors designed using standard type material.
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Silicon Schottky Barrier Detector Diodes
Applications
These diodes categorized (Tangential Signal Sensitivity) detector applications four frequency ranges: Ka-band. However, they also used modulators, high speed switches power limiters. parameters chips beam-lead diodes tested sample basis, while breakdown voltage capacitance measurements 100% tested. Packaged diodes 100% tested. Bias does, however, increase noise, particularly region. Therefore, should kept level possible (typically 5-50 microamps). Voltage output versus power input function load resistance bias shown Figures
Assembly Handling Procedure
parameter that best describes diode's video detector. defined amount signal power, below milliwatt reference level, required produce output pulse whose amplitude sufficient raise noise fluctuations amount equal average noise level. approximately above Minimum Detectable Signal.
Attach Methods
universal chips compatible with both eutectic conductive epoxy attach methods. Eutectic composition preforms Au/Sn Au/Ge useful when soldering devices circuit. Gold/silicon eutectic attach accomplished scrubbing chip directly gold plated bonding area. Epoxy attach with silver gold filled conductive epoxies, also used where thermal heat sinking requirement.
Schottky barrier diodes this data sheet P-type construction optimized noise, particularly region. They require small forward bias overcome barrier potential) efficient operation required, especially power levels below dBm. Bias only increases sensitivity also greatly reduces parameter variation temperature change. Video impedance direct function bias closely follows 28/l (mA) relationship. This important pulse fidelity, since video impedance conjunction with detector output capacitance affects effective amplifier bandwidth.
Wire Bonding
methods used connect wire, ribbon, wire mesh chips: Thermocompression Ballbonding Alpha recommends pure gold wire (0.7 1.25 diameter).
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Silicon Schottky Barrier Detector Diodes
Electrical Specifications 25°C Type Detectors
Beam-Lead
Electrical Characteristics Frequency Band Part Number DDB2503-000 DDB2504-000 DDB2265-000 dBm1,2 Min. (Ohms) Min. 8003 Max. 12003 Gamma (pF) Max. 0.15 0.10 0.10 200-350 200-350 300-450 24.15 491-006 491-006 491-006 (mv) (Ohms)
Test Conditions Frequency
Outline Drawing Number
Chip
CDB7620-000 CDB7619-000 8000 5000 0.15 0.10 250-350 300-450 24.15 526-006 526-006
Packaged Diodes
CDB7620-207 CDB7619-207 DDB2503-250 DDB2504-250 DDB2265-250 DDB2265-220 8003 8003 12003 12003 8000 5000 0.15 0.10 0.15 0.10 0.10 0.10 300-350 300-450 200-350 200-350 300-450 300-450 24.15 24.15 24.15
Type Detectors
Electrical Characteristics Frequency Band Part Number Drive Level (mv) 240-300 270-350 350-450 375-500 450-575 (pF) Max. CDF7623-000 CDF7621-000 CME7660-000 CDE7618-000 CDP7624-000 Med/High 0.30 0.10 0.15 0.10 0.15 (Ohms)
Bias Video Bandwidth MHz. Bias 2800 Ohms.
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Silicon Schottky Barrier Dector Diodes
Spice Model Parameters
Part Number Parameter Unit
CDF7621-000 CDC7630-000 CDB7619-000
10-1
10-2
8E-08 1.04 1E-11 0.11 0.69 0.51 1E-05
3E-06 1.04 1E-11 0.25 0.69 0.34 0.001
3E-09 1.04 1E-11 0.11 0.32 0.69 0.54 1E-05
(Amps)
10-4
10-5
10-6
(Volts)
CDC7630-000
10-1
Typical Characteristics
10-1
10-2
(Amps)
10-2
10-4
(Amps)
10-5
10-4
10-6
(Volts)
10-5
CDB7619-000
10-6
(Volts)
Shipping Information
CDF7621-000
Individual Chips
Standard packaging procedures Alpha "wafflepack" delivery. Devices also packaged "GelPack" carriers.
Wafer Shipment Whole Wafer
Packaging options include delivery devices film frame where wafer sawn wafer pack uncut, unsawn wafer.
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Silicon Schottky Barrier Detector Diodes
Typical Performance Data
Unbiased Input
10000.00
100K
Bypass
Video Output Load Resistor
1000.00 Voltage Output,
Return
100.00
10.00
Bias Supply Biased Input Bypass Video Output Load Resistor Return
1.00
Test Conditions: F=9.375 Bias
0.10
Power Input, Multi Octave-High Sensitivity
Figure Voltage Output Power Input Function Load Resistance
Unbiased 10000.00
Input
Bypass
Video Output Load Resistor
1000.00 Voltage Output,
100.00
Bias Supply Biased
10.00
1.00
Test Conditions: F=9.375
Input
Bypass
Video Output Load Resistor
0.10
Power Input,
Figure Voltage Output Power Input Function Load Resistance Bias
Broadband-Low Sensitivity
Figure Typical Video Detector Circuits
Frequency Table
Band Frequencies (GHz) 12.4 12.4 18.0 26.5 26.5
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Silicon Schottky Barrier Detector Diodes
Outline Drawings
491-006 526-006, 526-011
526-006 Cathode Bond 526-011 Anode Bond
0.015 (0.38 0.013 (0.33
0.015 (0.38 0.013 (0.33 Bonding (526-006 Cathode) 526-011 Anode) Diameter 0.0035 0.004
0.0085 (0.216 0.0065 (0.165
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Alpha Industries [617] 5150 [617] 4579 E-mail sales@alphaind.com Visit site: www.alphaind.com
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