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Download DDC, CDC, SMS Series: Zero Bias Silicon Schottky Barrier Detector Diodes Applications Features
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DATA SHEET DDC, CDC, SMS Series: Zero Bias Silicon Schottky Barrier Detector Diodes Applications x Microwave Integrated Circuits x Detectors Features x High sensitivity x Low video impedance x Packages rated MSL1, 260 qC per JEDEC J-STD-020) Skyworks offers lead (Pb)-free, RoHS (Restriction of Hazardous Substances) compliant packaging. Description Skyworks packaged, beam-lead and zero-bias Schottky barrier detector diodes are designed for applications through the K band. The choice of barrier metal and process techniques results in a group of diodes with a wide selection of video impedance ranges. Packaged diodes are suitable for use in waveguide, coaxial, and stripline applications. Beam-lead and chip diodes can also be mounted in a variety of packages. The DDC, CDC, and SMS series of Schottky diodes are especially well suited for use in Microwave Integrated Circuit (MIC) applications where the chip and wire approach is more desirable. Mounted beam-lead diodes can be easily used in MIC, stripline, or other such circuitry. Applications The DDC, CDC, and SMS series of zero-bias Schottky diodes are designed for detector applications through 26 GHz and are useful up 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. A low video impedance means a short R-C time constant and, therefore, wide video bandwidth and excellent pulse fidelity. As power monitors, these diodes may also be used to directly drive metering circuits even at low power input levels. These diodes are categorized by Tangential Signal Sensitivity (TSS), voltage output, and video impedance for detector applications. TSS is a parameter that best describes the use of a diode 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 with an amplitude sufficient to raise 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. The absolute maximum ratings for the DDC, CDC, and SMS series of Schottky diodes is provided in Table 1. Electrical and physical specifications are provided in Table 2. Package types for the epoxy and hermetic diodes are listed in Table 3. Typical performance characteristics are shown in Figures 1 through 8. Typical video detector circuits are shown in Figure 9. The multi-octave, high-sensitivity circuit would be used in Electronic Countermeasures (ECM) and similar applications. An RF matching structure that presents maximum power at the diode junction must be incorporated to ensure maximum sensitivity. The broadband low-sensitivity circuit would be used where a low input VSWR is required. In this circuit, low VSWR is accomplished by the use of the 50 Ω terminating resistor. Sensitivity, however, is degraded by typically 10 dB from the multi-octave, high-sensitivity circuit. The most common use for this circuit is in a broadband, flat detector used primarily in the laboratory. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 200843B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • October 7, 2009 1 DATA SHEET • DDC, CDC, SMS SERIES: ZERO BIAS SCHOTTKY DIODES Table 1. DDC, CDC, SMS Diode Series Absolute Maximum Ratings Parameter Symbol Minimum Maximum Units V Reverse voltage VR 2 Forward current IF 100 mA RF input power @ TA = 25 °C PD 75 mW Storage temperature TSTG –60 +200 qC Operating temperature TA –55 +150 qC Note: Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other parameters set at or below their nominal value. Exceeding any of the limits listed here may result in permanent damage to the device. CAUTION: Although this device is designed to be as robust as possible, Electrostatic Discharge (ESD) can damage this device. This device must be protected at all times from ESD. Static charges may easily produce potentials of several kilovolts on the human body or equipment, which can discharge without detection. Industry-standard ESD precautions should be used at all times. The DDC, CDC, SMS series of Schottky diodes are Class 0 Human Body Model (HBM) ESD devices. Table 2. DDC, CDC, SMS Diode Series Electrical Specifications (Note 1) (TA = +25 qC, Characteristic Impedance [ZO] = 50 Ω, Unless Otherwise Noted) Part Number Min. Detected Output Voltage, EO (mV) Video Impedance, ZV (Ω) Max. TSS (dBm) Outline Drawing DDC2353-000 8 2000 to 5000 –52 491-006 DDC2354-000 15 5000 to 15000 –56 491-006 CDC7630-000 8 2000 to 5000 –52 571-006 CDC7631-000 15 5000 to 15000 –56 571-006 Note 1: Performance is guaranteed only under the conditions listed in this Table and is not guaranteed over the full operating or storage temperature ranges. Operation at elevated temperatures may reduce reliability of the device. Table 3. Epoxy and Hermetic Packaged Zero Bias Schottky Detector Diodes Part Numbers/Outline Drawings Epoxy Stripline 250 Hermetic Pill 207 Hermetic Pill 203 Hermetic 109 Hermetic 220 DDC2353-250 CDC7630-207 CDC7630-203 SMS7630-109 DDC2353-220 DDC2354-250 CDC7631-207 CDC7631-203 SMS7619-109 DDC2354-220 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 2 October 7, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200843B DATA SHEET • DDC, CDC, SMS SERIES: ZERO BIAS SCHOTTKY DIODES Typical Performance Characteristics +60 Tangential Signal Sensitivity (dBm) Forward Current (mA) 10.0000 1.0000 Low Video Impedance Types 0.1000 0.0100 High Video Impedance Types 0.0010 0.0001 0 5 10 15 20 25 30 35 +58 +56 +54 Test Condition: Video Bandwidth = 10 MHz +52 +50 100 40 1000 10000 100000 Video Impedance (Ω) Forward Voltage (mV) Figure 1. Zero BIas Schottky Detector Diodes Typical Forward DC Characteristics Figure 2. Typical Zero Bias X-Band Detector Diodes TSS vs Video Impedance 800 10000.00 100 kΩ 700 Output Voltage (mV) Output Voltage (mV) 1000.00 100.00 ZV = 10 kΩ 10.00 ZV = 1 kΩ 1.00 ZV = 400 kΩ 0.10 0.01 –50 –40 –30 –20 Test Conditions: f = 9.375 GHz Load Resistance = 10 MΩ –10 0 +10 +20 Input Power (dBm) Figure 3. Typical Zero Bias X-Band Detector Diodes Output Voltage vs Input Power as a Function of Video Impedance 50 kΩ 10 kΩ 600 500 400 1 kΩ 300 –40 –25 –10 +5 +20 +35 +50 +65 +80 +95 Temperature (°C) Figure 4. Output Voltage vs Temperature Over Load Resistance @ 0 dBm Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 200843B • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • October 7, 2009 3 DATA SHEET • DDC, CDC, SMS SERIES: ZERO BIAS SCHOTTKY DIODES 200 1000.00 180 +25 °C 50 kΩ Output Voltage (mV) Output Voltage (mV) 100.00 –40 °C 10.00 +95 °C 1.00 100 kΩ 160 10 kΩ 140 120 100 80 0.10 1 kΩ 60 40 –40 –25 –10 0.01 –30 –20 –10 0 +5 +20 +35 +50 +65 +80 +95 Temperature (°C) Input Power (dBm) Figure 5. Output Voltage vs Input Power Over Temperature (Load Resistance = 1 kΩ) Figure 6. Output Voltage vs Temperature Over Load Resistance @ –10 dBm 5 1000 100 kΩ Output Voltage (mV) Output Voltage (mV) 4 +95 °C 100 +25 °C –40 °C 10 50 kΩ 3 10 kΩ 2 1 1 kΩ 1 –30 0 –20 –10 0 Input Power (dBm) Figure 7. Output Voltage vs Input Power Over Temperature (Load Resistance = 100 kΩ) –40 –25 –10 +5 +20 +35 +50 +65 +80 +95 Temperature (°C) Figure 8. Output Voltage vs Temperature Over Load Resistance @ –30 dBm Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 4 October 7, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200843B DATA SHEET • DDC, CDC, SMS SERIES: ZERO BIAS SCHOTTKY DIODES RF Bypass Input Video Output Load Resistor DC Return Multi-Octave: High-Sensitivity RF Bypass Input Video Output R = Z0 Load Resistor Broadband: Low-Sensitivity Figure 9. Typical Video Detector Circuits 0.35 Max. Typ. 0.43 ± 0.05 0.60 Typ. 2 1 0.35 Max. Typ. Cathode Pin 1 Indicator 0.45 ± 0.05 2 Plcs. Bottom View 1 1.83 ± 0.10 2 1.00 (Max.) Gold-Plated Kovar Lid XX 1.43 ± 0.10 0.15 Typ. Top View Side View All dimensions in mm Figure 10. -109 Package Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 200843B • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • October 7, 2009 5 DATA SHEET • DDC, CDC, SMS SERIES: ZERO BIAS SCHOTTKY DIODES Schematic N-Type 1 1 0.050 (1.27 mm) 0.040 (1.02 mm) 2 2 0.055 (1.40 mm) 0.051 (1.30 mm) Dia. Dimensions are in inches (millimeters shown in parentheses) S1569 Figure 11. -203 Package Dimensions Schematic P-Type 0.064 (1.63 mm) 0.060 (1.52 mm) Dia. 2 Plcs. Schematic N-Type 0.086 (2.18 mm) Max. Dia. Metal Ceramic 0.200 (5.08 mm) Nom. 0.076 (2.10 mm) ±0.006 (1.78 mm) Metal 0.062 (1.63 mm) ±0.002 (1.52 mm) 2 Plcs Dimensions are in inches (millimeters shown in parentheses) Figure 12. -207 Package Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 6 October 7, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200843B DATA SHEET • DDC, CDC, SMS SERIES: ZERO BIAS SCHOTTKY DIODES Schematic 2 1 -011 (220) 0.185 (4.70 mm) 0.145 (3.68 mm) 3 Plcs. 0.068 (1.73 mm) 0.064 (1.63 mm) Dia. 2 1 0.022 (0.56 mm) 0.018 (0.46 mm) 3 Plcs. Colored Dot Denotes Cathode 0.070 (1.78 mm) Sq. 0.042 (1.07 mm) 0.028 (0.71 mm) 0.005 (0.13 mm) 0.003 (0.08 mm) 3 Plcs. Dimensions are in inches (millimeters shown in parentheses) Figure 13. -220 Package Dimensions Schematic 1 2 0.100 (2.54 mm) Dia. 0.090 (2.28 mm) 0.110 (2.79 mm) 2 Plcs. Colored Dot Denotes Cathode 1 2 0.018 (0.45 mm) 0.122 (0.55 mm) 2 Plcs. 50 Deg. 40 Deg. Epoxy Encapsulation Au-Plated Leads 0.018 (0.45 mm) 0.122 (0.55 mm) 0.003 (0.08 mm) 0.005 (0.13 mm) 0.050 (1.27 mm) Max. Dimensions are in inches (millimeters shown in parentheses) Figure 14. -250 Package Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 200843B • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • October 7, 2009 7 DATA SHEET • DDC, CDC, SMS SERIES: ZERO BIAS SCHOTTKY DIODES 0.013 (0.33 mm) 0.011 (0.28 mm) 0.011 (0.28 mm) 0.009 (0.23 mm) 0.006 (0.15 mm) 0.004 (0.10 mm) 2 Plcs. 0.009 (0.23 mm) 0.007 (0.18 mm) 0.009 (0.23 mm) 0.007 (0.18 mm) 0.006 (0.015 mm) 0.003 (0.005 mm) 0.0025 (0.06 mm) Max. Top View Schematic Dimensions are in inches (millimeters shown in parentheses) Figure 15. 491-006 Package Dimensions Cathode/Bonding Pad Diameter 0.0035–0.0045 0.0095 (0.241 mm) 0.0115 (0.292 mm) 0.0095 (0.241 mm) 0.0115 (0.292 mm) 0.0085 (0.216 mm) 0.0065 (0.165 mm) Backside Contact (Anode) Gold Metallization Dimensions are in inches (millimeters shown in parentheses) Figure 16. 571-006 Package Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 8 October 7, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200843B DATA SHEET • DDC, CDC, SMS SERIES: ZERO BIAS SCHOTTKY DIODES Copyright © 2002-2009 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. 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Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 200843B • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • October 7, 2009 9