Surface Mount Hyperabrupt Varactors

MA4ST300 Series

M/A-COM Division of AMP Incorporated

3 North America: Tel. (800) 366-2266, Fax (800) 618-8883 3 Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087

3 Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020

www.macom.com

AMP and Connecting at a Higher Level are trademarks.

Specifications subject to change without notice.

Absolute Maximum Rating @ 25°C

Features

• Surface Mount Packages

• High Quality Factor

• Capacitance Ratio to 9.5:1

• Tape and Reel Packaging Available

• SPC Monitored Ion Implantation for Excellent

C-V Repeatability

• Singles and Common Cathode Pairs

Description

M/A-COM’s MA4ST400 series are ion-implanted, hyperabrupt

junction, silicon tuning varactors in the SOT-23 surface mount

package.

These thermal oxide passivated diodes feature high

capacitance ratio and quality factor.

They are well suited for

octave bandwidth tuning in the HF to UHF frequency bands. The

standard capacitance tolerance is ± 10%, with tighter tolerances

available. Capacitance matching at one or more bias voltages is

also available.

Applications

The MA4ST400 series tuning varactors are useful for octave

bandwidth tuning applications in the HF through UHF ranges.

Applications include VCOs and voltage tuned filters in radios,

cable TV tuners and test instruments where low cost and excellent

lot-to-lot repeatability are critical. Linear tuning performance is

available from 3 to 8 volts.

Ordering Information

The model number indicated is for a single varactor.

When

ordering diodes in common cathode pairs add suffix “CK.” For

example, MA4ST401CK specifies model number MA4ST401 in

common cathode pairs. To order parts on tape and reel add suffix

“T” to the end of the part number. i.e., MA4ST401CK-T.

SOT-233

Surface Mount

Hyperabrupt Varactors

MA4ST400 Series

TOP VIEW

Single

Double

Configurations

Parameter

Absolute Maximum

Reverse Voltage

22 Volts

Forward Current

50 mA

Total Power Dissipation

1

250 mW

Junction Operating Temp.

-55°C to +125°C

Storage Temperature

-55°C to +125°C

1. At 25°C case temperature. Derate linearly to zero at 150°C.