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Also Offering RoHs Compliant Equivalent Parts Surface Mount Hyperabrupt Wide-Band Tuning Varactors
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 available with 260C reflow compatibility
MA4ST079 thru MA4ST083 Series V4
SOT-23
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.These diodes are offered with standard Sn/Pb plating , as well as 100% matte Sn plating on our RoHs compliant equivalent devices.
Absolute Maximum Ratings @ TA=+25 C (Unless Otherwise Noted) 1
Parameter Reverse Voltage Forward Current Power Dissipation Operating Temperature Storage Temperature Absolute Maximum 12 V 50 mA 50mW @25C -65 C to +125 C -65 C to +125 C
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 voltagecontrolled 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
Part Number MA4ST079 MA4ST080 MA4ST081 MA4ST082 MA4ST083 RoHs Compliant Part Number1 MAVR-000079-XXXXXX MAVR-000080-XXXXXX MAVR-000081-XXXXXX MAVR-000082-XXXXXX MAVR-000083-XXXXXX
1. Operation of this device above any one of these parameters may cause permanent damage.
Configurations
1 Suffix refers to package style , configuration and packaging requirements. Contact representative for complete part number information.
1
M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information.
* North America Tel: 800.366.2266 / Fax: 978.366.2266 * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information.
Also Offering RoHs Compliant Equivalent Parts Surface Mount Hyperabrupt Wide-Band Tuning Varactors
Electrical Specifications @ TA = +25 C
Breakdown Voltage @ IR = 10A, Vb = 12 V Minimum Reverse Leakage Current @ VR =10V, IR = 100 nA Maximum Temperature Coefficient of Capacitance @VR=8 Volts, TCC=400ppm/C Typical Ct (pF)2 Part Number Base RoHs Compliant Part Number Base1
VR = 1.0V f=1MHz Min. MA4ST079 MA4ST080 MA4ST081 MA4ST082 MA4ST083
1 2
MA4ST079 thru MA4ST083 Series V4
Typical Capacitance Ratio
Vr=1V/Vr=8V f=1MHz Typ. 9.1 8.9 8.5 8.2 7.8
Typical Q
Vr=4V F=50MHz Typ. 80 150 300 350 450
VR = 2.5V f=1MHz Min 48.7 22.3 9.1 6.6 4.5 Max 59.5 27.3 11.1 8.0 5.5
VR = 4.0V VR = 8.0V f=1MHz f=1MHz Max 27.3 13.1 5.2 3.8 2.6 Max 11.8 5.5 2.4 1.8 1.3
MAVR-000079-XXXXXX MAVR-000080-XXXXXX MAVR-000081-XXXXXX MAVR-000082-XXXXXX MAVR-000083-XXXXXX
87.4 40.0 16.2 11.5 7.9
The prefix defines package style, configuration and packaging information. Contact representative for complete part identification. Capacitance @ 1 MHz
Typical Performance Curves
Note : Performance curves also reflect that of the RoHs equivalent part
2
M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information.
* North America Tel: 800.366.2266 / Fax: 978.366.2266 * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information.
Also Offering RoHs Compliant Equivalent Parts Surface Mount Hyperabrupt Wide-Band Tuning Varactors
Case Styles SOT-23 Case Style 287
F D A N
MA4ST079 thru MA4ST083 Series V4
SOT-23 (Case Style 287)
INCHES MAX. MILLIMETERS MIN. MAX.
1.22 0.20 1.00 0.35 0.50 0.08 0.15 2.80 3.00 1.20 1.40 0.95 typical 1.90 typical 2.60 0.60
DIM.
A B C D E F G H J K L
MIN.
M G
B K
L H J C E
0.048 0.008 0.040 0.013 0.020 0.003 0.006 0.110 0.119 0.047 0.056 0.037 typical 0.075 typical 0.103 0.024
DIM.
M N
GRADIENT
10 max.1 2 . . .30
Mounting Information
The illustration indicates the recommended mounting pad configuration for the SOT-23 package. Solder paste containing flux should be screened onto the pads to a thickness of 0.005- 0.007 inches. The plastic package is placed in position, firmly adhering to the solder paste. Permanent attachment is performed by a reflow soldering procedure during which the tab temperature does not exceed +275 C and the body temperature does not exceed +250 C, for standard models and +260 C for the RoHS compliant devices. Please refer to Application Note M538 for surface mounting instructions.
SOT-23
.030 min. 0.80
.035 min. 0.90 .037 0.95 0.75 1.9
.090 2.2
Dimenstions: inches mm
3
M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information.
* North America Tel: 800.366.2266 / Fax: 978.366.2266 * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information.

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