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| Surface Mount Hyperabrupt Wide-Band Tuning Varactors Features q q q q q q MA4ST079 thru 083 V3.00 SOT-23 q q 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 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 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 tolerance is 10%, with tighter tolerances available. Capacitance matching at one or more bias voltages is also available. Configurations TOP VIEW (SINGLE) 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. (COMMON CATHODE PAIR) Specifications Subject to Change Without Notice. M/A-COM, Inc. North America: Tel. (800) 366-2266 Fax (800) 618-8883 s 1 Asia/Pacific: Tel. +81 3 3263 8761 Fax +81 3 3263 8769 s Europe: Tel. +44 (1344) 869 595 Fax +44 (1344) 300 020 Surface Mount Hyperabrupt Wide-Band Tuning Varactors Electrical Specifications @ 25C Breakdown Voltage @ IR = 10 A, VB = 12 Volts Minimum Reverse Leakage Current @ VR = 10 Volts, IR = 100 nA Maximum Temperature Coefficient ot Capacitance @ VR = 8 Volts, TCC = 400 ppm/C Typical Model Number Minimum Total Capacitance (pF) f = 1 MHz VR = 1 Volt Total Capacitance (pF) f = 1 MHz VR = 2.5 Volts min. max. 48.7 22.3 9.1 6.6 4.5 59.5 27.3 11.1 8.0 5.5 Maximum Maximum Total Capacitance Total Capacitance (pF) (pF) f = 1 MHz VR = 4 Volts f = 1 MHz VR = 8 Volts MA4ST079 thru 083 V3.00 Typical Total Capacitance Ratio CT1/CT8 f = 1 MHz VR = 1/ VR=8 Typical Q f = 50 MHz VR = 4 Volts MA4ST079 MA4ST080 MA4ST081 MA4ST082 MA4ST083 87.4 40.0 16.2 11.5 7.9 27.3 13.1 5.2 3.8 2.6 11.8 5.5 2.4 1.8 1.3 9.1 8.9 8.5 8.2 7.8 80 150 300 350 450 Absolute Maximum Ratings @ 25C Parameter Reverse Voltage Junction Temperature Storage Temperature Forward Current Power Dissipation Absolute Maximum 12 Volts -65C to +125C -65C to +125C 50 mA 50 mW @ 25C Ordering Information The part numbers shown are for single diodes. When ordering diodes in common cathode pairs add suffix "CK." For example, MA4ST079CK specifies model number MA4ST079 as a common cathode pair. To order parts on tape and reel add suffix T/R to the end of the part number. i.e. MA4ST079-T/R Specifications Subject to Change Without Notice. 2 North America: Tel. (800) 366-2266 Fax (800) 618-8883 s M/A-COM, Inc. Asia/Pacific: Tel. +81 3 3263 8761 Fax +81 3 3263 8769 s Europe: Tel. +44 (1344) 869 595 Fax +44 (1344) 300 020 Surface Mount Hyperabrupt Wide-Band Tuning Varactors MA4ST079 thru 083 V3.00 Case Style SOT-23 (High Profile) DIM. A B C D E F G Package Capacitance = 0.15 pF typical Package Inductance = 2 nH typical INCHES MIN. -- -- -- 0.013 0.003 0.110 0.047 MAX. 0.048 0.008 0.040 0.020 0.006 0.119 0.056 MILLIMETERS MIN. -- -- -- 0.35 0.08 2.80 1.20 MAX. 1.22 0.20 1.00 0.50 0.15 3.00 1.40 H J K L DIM. M N 0.037 typical 0.075 typical 0.103 0.024 GRADIENT 10 max.1 2...30 0.95 typical 1.90 typical 2.60 0.60 Note: 1. Applicable on all sides Typical Performance Curves TOTAL CAPACITANCE vs REVERSE VOLTAGE NOMINAL Q vs REVERSE VOLTAGE Specifications Subject to Change Without Notice. M/A-COM, Inc. North America: Tel. (800) 366-2266 Fax (800) 618-8883 s 3 Asia/Pacific: Tel. +81 3 3263 8761 Fax +81 3 3263 8769 s Europe: Tel. +44 (1344) 869 595 Fax +44 (1344) 300 020 |
Price & Availability of MA4ST081
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