Surface Mount Hyperabrupt Varactors
MA4ST300 Series
MA4ST400 Series
Surface Mount
Hyperabrupt Varactors
Features
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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
SOT-233
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.
Configurations
TOP VIEW
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.
Single
Double
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.
Absolute Maximum Rating @ 25°C
Parameter
Reverse Voltage
Forward Current
1
Total Power Dissipation
Junction Operating Temp.
Storage Temperature
Absolute Maximum
22 Volts
50 mA
250 mW
-55°C to +125°C
-55°C to +125°C
1. At 25°C case temperature. Derate linearly to zero at 150°C.
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.
