For UHF-TV-tuners

The ASI 1N5148 is a Silicon Abrupt Junction Microwave Tuning Varactor Diode.

This device is designed in the Surface Mount package for general frequency controland tuning applications. It provides solid-state reliability in replacement of mechanical tuning methods. High Q with Guaranteed Minimum Values at VHF Frequencies, Controlled and Uniform Tuning Ratio.

The MA4ST079 through MA4ST083 series of silicon hyperabrupt junction tuning varactors is produced with ion implantation and advanced epitaxial growth techniques. These diodes have thermal oxide passivation, and feature very high capacitance ratio and quality factor. They are well suited for use from the sub-HF through UHF frequency range. The standard capacitance tolerance is ±10%, with tighter tolerances available. Capacitance matching at one or more bias voltages is also available.

The NTE618 is a silicon varactor diode with a good linearity and high capacitance ratio that is capable of beinf operated from a low voltage. This device is intended for use in AM receiver electronic tuning applications.

The SMV1247-SMV1255 series of silicon hyperabrupt junction varactor diodes is designed for use in VCOs with low tuning voltage operation. This family of varactors is characterized for capacitance and resistance over temperature. SPICE models are provided.

Twin type varactor diode for low-voltage AM electronic tuning applications. Low operating voltage(£6.5V). High Q.

Features http://onsemi.com · High Q with Guaranteed Minimum Values at VHF Frequencies · Controlled and Uniform Tuning Ratio · Surface Mount Package VOLTAGE VARIABLE · Pb-Free Package is Available CAPACITANCE DIODE 1 2 MAXIMUM RATINGS CATHODE ANODE Rating Symbol Value Unit Continuous Reverse Voltage VR 20 Vdc Peak Forward Current IF 200 mAdc 2 THERMAL CHARACTERISTICS 1 Characteristic Symbol Max Unit Total Device Dissipation FR-5 Board, PD TA = 25°C (Note 1) 200 mW

Twin type with a good linearity of C-V characteristic. Excels in large input characteristic. Small package permits SVC276-applied sets to be compact and slim.

High capacitance ratio: C1V/C4.5V = 5.3 (typ.) Low series resistance: rs = 0.4 ? (typ.) Two diodes in a single package