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Visit www.macomtech.com for additional data sheets and prod uct information.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
changes to the product(s) or information contained herein without notice.
1
Surface Mount Hyperabrupt Varactors
Rev. V5
MA4ST400 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
• 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 Pai rs
• Lead-Free (RoHS Compliant) Equivalents
Available with 260 °C Reflow Compatibili ty
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. These diodes are offered with standard
Sn/Pb plating, as well as with 100% matte Sn plating
on our RoHS compliant devices.
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.
Absolute Maximum Ratings 1,2
@ TA=+25 °C (Unless Otherwise Noted)
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 22V
Forward Current 50 mA
Operating Temperature -55 °C to +125 °C
Storage Temperature -55 °C to +125 °C
Total Power Dissipation 250 mW
Part Number RoHs Compliant
Part Number Configura-
tion
MA4ST401-287T MAVR-000401-0287AT Single
MA4ST403-287T MAVR-000403-0287AT Single
MA4ST404-287T MAVR-000404-0287AT Single
MA4ST405-287T MAVR-000405-0287AT Single
MA4ST406-287T MAVR-000406-0287AT Single
MA4ST407-287T MAVR-000407-0287AT Single
MA4ST408-287T MAVR-000408-0287AT Single
MA4ST409-287T MAVR-000409-0287AT Single
MA4ST401CK-287T MAVR-000401-0287FT Common
Cathode
MA4ST403CK-287T MAVR-000403-0287FT Common
Cathode
MA4ST404CK-287T MAVR-000404-0287FT Common
Cathode
MA4ST405CK-287T MAVR-000405-0287FT Common
Cathode
MA4ST406CK-287T MAVR-000406-0287FT Common
Cathode
MA4ST407CK-287T MAVR-000407-0287FT Common
Cathode
MA4ST408CK-287T MAVR-000408-0287FT Common
Cathode
MA4ST409CK-287T MAVR-000409-0287FT Common
Cathode
RoHS Compliant Parts 3
3. Suffix refers to package style, configuration and packaging
requirements. Other packages and configurations may be
available upon request.
Configurations
Common Cathode Single