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Visit www.macomtech.com for additional data sheets and product information.

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changes to the product(s) or information contained herein without notice.

1

Surface Mount Hyperabrupt Wide-Band Tuning Varactors

Rev. V6

MA4ST079 thru MA4ST083 Series

ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions

is considering for development. Performance is based on target specifications, simulated results,

and/or prototype measurements. Commitment to develop is not guaranteed.

PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology

Solutions has under development. Performance is based on engineering tests. Specifications are

typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.

Commitment to produce in volume is not guaranteed.

Features

• Low Cost

• Very High Capacitance Ratio from 1 to 8 Volts

• Surface Mount Package

• High Quality Factor

• Useful for Battery Applications

• SPC Monitored Ion Implantation for Excellent C-

V Repeatability

• Singles and Common Cathode Pairs

• Available in Tape and Reel

• Lead-Free (RoHs Compliant) equivalents avail-

able with 260°C reflow compatibility

Description

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 pas-

sivation, 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 toler-

ances available. Capacitance matching at one or

more bias voltages is also available.These diodes

are offered with standard Sn/Pb plating , as well as

100% matte Sn plating on our RoHs compliant

equivalent devices.

Applications

The MA4ST079 through MA4ST083 series of hy-

perabrupt junction tuning varactors is suggested for

usage where a large frequency change is required

with only a small change in tuning voltage. This se-

ries is appropriate for usage in wide band voltage-

controlled oscillators and voltage controlled filters

which require the largest rate of change of capaci-

tance with voltage. The large change in capacitance

from 1 to 8 volts makes them very attractive for bat-

tery operated or other systems with limited available

control voltage. The MA4ST079 through MA4ST083

family can be used in VCOs and VTFs from approxi-

mately 100 KHz through the UHF frequency band.

Absolute Maximum Ratings

1,2

1. Operation of this device above any one of these parameters

may cause permanent damage.

2. Please refer to application note M538 for surface mounting

instructions

Parameter

Absolute Maximum

Reverse Voltage

12 V

Forward Current

50 mA

Operating Temperature

-65 °C to +125 °C

Storage Temperature

-65 °C to +125 °C

Power Dissipation

50mW @25°C

Part Number

RoHs Compliant Part Number

3

MA4ST079

MAVR-000079-XXXXXX

MA4ST080

MAVR-000080-XXXXXX

MA4ST081

MAVR-000081-XXXXXX

MA4ST082

MAVR-000082-XXXXXX

MA4ST083

MAVR-000083-XXXXXX

3. Suffix refers to package style , configuration and packaging

requirements. See electrical specification for complete

part number offerings

SOT-23

Configurations

Ordering Information

Specifications are subject to change without prior notification