Silicon Low Capacitance Hyperabrupt Junction Varactor Diodes SMV2019 to SMV2023 Features Octave Frequency Tuning from 0 to 10 Volts Good Linearity Tuning Ratio Without Compensation Network Offered in Package Styles Suitable for a Wide Range of Applications Description Maximum Ratings Alpha microwave hyperabrupt diodes are designed for wideband tuning of microwave filters, resonators, and local oscillators. Linear tuning, not possible with conventional abrupt-junction tuning diodes, is accomplished by maintaining an accurate silicon doping profile using ion-implantation precision control techniques. Reverse Voltage, VR: Forward Current, IF: Power Dissipation at 25C: Operating Temperature: Storage Temperature: This series of hyperabrupt diodes offer wide bandwidth tuning with low bias voltage. For example, a 22 volt hyperabrupt diode can provide the same tuning variation as a 90 volt abrupt-junction diode. When capacitance and tuning ratio values are equal, a hyperabrupt diode will have a Q (measured at -4 volts, 50 MHz) approximately 1/2 to 1/3 that of an abrupt-junction diode. 22V 100 mA 250 mW -55 to 150C -65 to 200C These diodes are available in many Alpha ceramic packages. They can be supplied in chip form or mounted on a variety of packages. All chips are passivated with silicon dioxide for reliability and low leakage current. The specifications table indicates chip capacitance measured at 1 MHz. For packaged varactors add appropriate package capacitance, e.g., 0.22 pF for package 210, to obtain total capacitance. Electrical Specifications at 25C Square Passivated Silicon Chips VB @ 10 A (V) IR @ 17.6V (nA) Min. Max. Min. Max. Min. Max. Min. SMV2019-000 22 50 0.68 0.88 0.13 0.23 500 149-801 SMV2020-000 22 50 1.13 1.43 0.23 0.33 500 149-801 SMV2021-000 22 50 1.58 1.98 0.32 0.44 500 149-801 SMV2022-000 22 50 2.48 3.08 0.48 0.68 400 149-801 SMV2023-000 22 50 4.28 5.28 0.78 1.08 400 149-801 Part Number CJ @ 4V (pF) CJ @ 20V (pF) Q @ 4V 50 MHz Chip Outline N mber Number Available through distribution. 2-10 Alpha Industries * * Fax * E-mail * Visit our web site: Silicon Low Capacitance Hyperabrupt Junction Varactor Diodes SMV2019 to SMV2023 Ordering Information The following packages are also available. To order part in a different package just replace the dash number with a package style listed below. For example, SMV2019-000 becomes SMV2019-210. 202 203 204 Available Package Outlines: 202, 203, 204, 210, 219, 230, 240 Refer to the Outline Drawings section in this catalog for the total selection of outline (package) dimensions. 210 219 230 240 Outline Dimensions 149-801 Alpha Industries * * Fax * E-mail * Visit our web site: 2-11 2