Surface Mount Hyperabrupt

Wide-Band Tuning Varactors

MA4ST079 thru 083

V3.00

M/A-COM, Inc.

North America:

Tel. (800) 366-2266

s

Asia/Pacific: Tel. +81 3 3263 8761

s

Europe: Tel. +44 (1344) 869 595

Fax (800) 618-8883

Fax +81 3 3263 8769

Fax +44 (1344) 300 020

1

Specifications Subject to Change Without Notice.

Features

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Low Cost

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Very High Capacitance Ratio from 1 to 8 Volts

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Surface Mount Package

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High Quality Factor

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Useful for Battery Applications

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SPC Monitored Ion Implantation for Excellent

C-V Repeatability

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Singles and Common Cathode Pairs

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Available in Tape and Reel

Description

The MA4ST079 through MA4ST083 series of silicon

hyperabrupt junction tuning varactors is produced with

ion implantation and advanced epitaxial growth tech-

niques. 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 toler-

ance is ±10%, with tighter tolerances available.

Capacitance matching at one or more bias voltages is

also available.

Applications

The MA4ST079 through MA4ST083 series of hyperabrupt

junction tuning varactors is suggested for usage where a

large frequency change is required with only a small

change in tuning voltage.

This series is appropriate for usage in wide band voltage

controlled oscillators and voltage controlled filters which

require the largest rate of change of capacitance with

voltage. The large change in capacitance from 1 to 8

volts makes them very attractive for battery operated or

other systems with limited available control voltage.

The MA4ST079 through MA4ST083 family can be used in

VCOs and VTFs from approximately 100 KHz through the

UHF frequency band.

SOT-23

Configurations

TOP VIEW

(SINGLE)

(COMMON CATHODE PAIR)