DATA SHEET Zero Bias Silicon Schottky Barrier Detector Diodes Features High sensitivity Low video impedance Description Skyworks series of packaged, beam-lead and chip zero bias Schottky barrier detector diodes are designed for applications through K band. The choice of barrier metal and process techniques results in a diode with a wide selection of video impedance ranges. The packaged diodes are suitable for use in waveguide, coaxial and stripline applications. The beam-lead and chip diodes can also be mounted in a variety of packages. Unmounted beam-lead diodes are especially well suited for use in MIC applications. Mounted beam-lead diodes can be easily used in MIC, stripline and other such circuitry. A complete line of chips is shown for those MIC applications where the chip and wire approach is more desirable. Applications The zero bias Schottky detector diodes are designed for detector applications through 6 GHz and are useful to 40 GHz. They require no bias and operate efficiently even at tangential signal power levels. Since they require no bias, noise is at a minimum. Their low video impedance means a short R-C time constant and hence wide video bandwidth and excellent pulse fidelity. As power monitors, these diodes may also be used to drive metering circuits directly even at low power input levels. These diodes are categorized by TSS (Tangential Signal Sensitivity), voltage output and video impedance for detector applications. TSS is the parameter that best describes a diode s use as a video detector. It is defined as the amount of signal power, below a one milliwatt reference level, required to produce an output pulse whose amplitude is sufficient to raise the noise fluctuations by an amount equal to the average noise level. TSS is approximately 4 db above the Minimum Detectable Signal. Voltage output is another useful parameter, since it can be used in the design of threshold detectors and power monitor circuits. Since voltage output is a function of the diode s video impedance, a different minimum value is specified for each video impedance range. Figure is a plot of the forward DC characteristics. In Figure voltage output is plotted as a function of power input for diodes of various video impedances. Tangential Signal Sensitivity as a function of video impedance is shown in Figure 3. Figure 4 shows two typical detector circuits. The multi-octave high-sensitivity circuit would be used in ECM and similar applications. An RF matching structure that will present the maximum power at the diode junction must be incorporated to insure maximum sensitivity. The broadband low-sensitivity circuit would be used where low input VSWR is required. In this circuit the low VSWR is accomplished by the use of the 50 Ω terminating resistor. Sensitivity, however, is degraded by typically 0 db from the multi-octave high-sensitivity circuit. The most common use for this circuit is in the broadband, flat detector used primarily in the laboratory. 00843 Rev. A Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. August 5, 008
Electrical Specifications at 5 C Part Number Min. EO (mv) Z V (Ω) Min. T SS (dbm) Outling Drawing DDC353-000 8 000 5000-5 49-006 DDC354-000 5 5000 5000-56 49-006 CDC7630-000 8 000 5000-5 57-006 CDC763-000 5 5000 5000-56 57-006 Epoxy and Hermetic Packages Epoxy Stripline 50 Hermetic Pill 07 Hermetic Pill 03 Hermetic 09 Hermetic 0 DDC353-50 CDC7630-07 CDC7630-03 SMS7630-09 DDC353-0 DDC354-50 CDC763-07 CDC763-03 SMS769-09 DDC354-0 Typical Performance Data Forward Current (ma) 0.0000.0000 0.000 0.000 0.000 0.000 Low Video Impedance Types High Video Impedance Types 0 5 0 5 0 5 30 35 40 Forward Voltage (mv) Zero Bias Schottky Detector Diodes Figure. Typical Forward DC Characteristics Tangential Signal Sensitivity (-dbm) 60 58 56 54 5 Test Conditions: Video BW = 0 MHz 50 00 000 0000 00000 Video Impedance (Ω) Typical Zero Bias X-Band Detector Diodes Figure 3. Tangential Signal Sensitivity vs. Video Impedance 0000.00 Input RF Bypass Video Output 000.00 Voltage Output, mv 00.00 0.00.00 0.0 Z V = 0 kω Z V = 400 kω Z V = kω Test Conditions: F = 9.375 GHz R L = 0 MΩ Input DC Return Multi-Octave High-Sensitivity RF Bypass Load Resistor Video Output 0.0-50 -40-30 -0-0 0 0 0 Power Input, dbm Load Resistor Typical Zero Bias X-Band Detector Diodes Figure. Voltage Output vs. Power Input As a Function of Video Impedance Broadband Low-Sensitivity Figure 4. Typical Video Detector Circuits August 5, 008 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. 00843 Rev. A
Typical I-V Characteristics 800 000.00 700 600 500 00 K 0 K 50 K 00.00 0.00.00-40 95 5 400 K 0.0 300-40 -5-0 5 0 35 50 65 80-95 Temperature ( C) Voltage Output vs Resistance at 0 dbm vs. Temperature C 0.0-30 -0-0 0 P IN (dbm) Transfer at -40, 5, 90 C R L = kω 00 80 60 40 0 00 80 00 K 50 K 0 K 000 00 0 5 95-40 60 K 40-40 -5-0 5 0 35 50 65 80-95 Temperature ( C) Voltage Output vs. Resistance at -0 dbm vs. Temperature C -30-0 -0 0 P IN (dbm) Transfer at -40, 5, 90 C R L = 00 kω 5 4 00K 50K 3 0K K 0-40 -5-0 5 0 35 50 65 80-95 Temperature ( C) Voltage Output vs. Resistance at -30 dbm vs. Temperature C 00843 Rev. A Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. August 5, 008 3
49 006-03 0.03 (0.33 mm) 0.0 (0.8 mm) N-Type 0.0 (0.8 mm) 0.009 (0.3 mm) 0.006 (0.5 mm) 0.004 (0.0 mm) Plcs. 0.050 (.7 mm) 0.040 (.0 mm) 0.009 (0.3 mm) 0.007 (0.8 mm) 0.009 (0.3 mm) 0.007 (0.8 mm) 0.055 (.40 mm) 0.05 (.30 mm) Dia. 47-00 0.006 (0.05 mm) 0.003 (0.005 mm) Top View 0.005 (0.06 mm) Max. -09 0.35 Max. Typ. 0.43 ± 0.05 57 006 Cathode/Bonding Pad Diameter 0.0035 0.0045 0.60 Typ. 0.35 Max. Typ. Cathode Pin Indicator 0.45 ± 0.05 Plcs. Bottom View 0.03 (0.33 mm) 0.0 (0.8 mm).83 ± 0.0.00 (Max.) Gold-Plated Kovar Lid 0.03 (0.33 mm) 0.0 (0.8 mm).43 ± 0.0 X X 0.5 Typ. 0.0085 (0.6 mm) 0.0065 (0.65 mm) All dimensions in mm Top View Side View 585-006 Backside Contact (Andode) Gold Metalization 4 August 5, 008 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. 00843 Rev. A
-07-50 0.064 (.63 mm) 0.060 (.5 mm) Dia. Plcs. 0.086 (.8 mm) Max. Dia. P-type N-type Colored Dot Denotes Cathode 50 Deg. 40 Deg. 0.00 (.54 mm) Dia. 0.090 (.8 mm) 0.0 (.79 mm) Plcs. 0.08 (0.45 mm) 0. (0.55 mm) Plcs. Metal Ceramic 0.003 (0.08 mm) 0.005 (0.3 mm) Epoxy Encapsulation Au-Plated Leads 0.08 (0.45 mm) 0. (0.55 mm) 0.076 (.0 mm) ±0.006 (.78 mm) 0.00 (5.08 mm) Nom. 0.050 (.7 mm) Max. 30-0 0.06 (.63 mm) ±0.00 (.5 mm) Plcs Metal 07-00 -0-0 (0) 0.068 (.73 mm) 0.064 (.63 mm) Dia. 0.85 (4.70 mm) 0.45 (3.68 mm) 3 Plcs. Colored Dot Denotes Cathode 0.070 (.78 mm) Sq. 0.0 (0.56 mm) 0.08 (0.46 mm) 3 Plcs. 0.005 (0.3 mm) 0.003 (0.08 mm) 3 Plcs. 0.04 (.07 mm) 0.08 (0.7 mm) 404-0 00843 Rev. A Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. August 5, 008 5
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