1
Low Tuning Voltage / Low Rs Silicon Hyperabrupt
Varactor Diode
Rev. V8
MA4ST1200 Series
• North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400
• India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588
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.
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
• Low Series Resistance at Low Tu ning Voltages
• High Capacitance Ratio at Low Tuning Voltages
• Surface Mount Plastic Packages : SC-79, SOD-
323, SC-70 ( 3L )
• SPC Process for Superior C vs V Repeatability
• Lead-Free (RoHs Compliant) equivalents avail-
able with 260°C reflow compatibility
Description
M/A-COM’s MA4ST1200 series is a highly repeat-
able, UHCVD/ion-implanted, hyperabrupt silicon tun-
ing varactor in a cost effective surface mount pack-
age. This series of varactors is designed for high
capacitance ratio, and high Q for low battery voltage
operation. It is efficient for wide band tuning and low
phase noise application where the supply voltage is
limited to 5 volts or less. The Varactors are offered
as Singles in SC-79, and SOD-323 along with a
Common Cathode version offered in the SC-70, 3
Lead. These diodes are offered with standard Sn/Pb
plating , as well as with 100% matte Sn plating on
our RohS compliant equivalent devices.
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 12 V
Forward Current 50 mA
Operating Temperature -55 °C to +125 °C
Storage Temperature -55 °C to +125 °C
SOD-323
SC-70 (3 lead)
SC-79
Part Number RoHs Compliant Part Number Configuration Package Package Cp
(pF) Package Ls
(nH)
MAVR-001230-12790T Single SC-79 0.10 0.6
MAVR-001240-12790T Single SC-79 0.10 0.6
MA4ST1231-1141T Single SOD-323 0.11 1.2
MA4ST1241-1141T Single SOD-323 0.11 1.2
MA4ST1230CK-1146T MA4ST1231CK-1146T Common Cathode SC-70 (3L) 0.12 1.3
MA4ST1240CK-1146T MA4ST1241CK-1146T Common Cathode SC-70 (3L) 0.12 1.3
Specifications subject to change without prior notification
2
Low Tuning Voltage / Low Rs Silicon Hyperabrupt
Varactor Diode
Rev. V8
MA4ST1200 Series
• North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400
• India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588
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.
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.
Electrical Specifications @ TA = +25 °C
Breakdown Voltage @ IR = 10
μ
A, Vb = 12 V Minimum
Reverse Leakage Current @ VR =10V, IR = 100 nA Maximum
1. The prefix defines package style, configuration and packaging information. Contact representative for complete part identification.
2. Capacitance @ 1 MHz
3. Series Resistance @ 100 MHz
Typical Capacitance vs. Biasin g Voltage
3
Typical Capacitance Change vs. Temperature
-4%
-2%
0%
2%
4%
-40 -15 10 35 60 85
Temperature (degree C)
% of Capacitance Change
(relative to 25 C)
0.00
0.20
0.40
0.60
0.80
1.00
0.00.51.01.52.02.53.0
Biasing Voltage (V)
Series Resistance (Ohm)
MA4ST1240/1241 / MAVR-001240
MA4ST1230/1231 MAVR-001230
Typical Rs vs Biasing Voltage
RoHs Compliant
Part Number Base1
Ct
(pF) 2 Capacitance
Ratio Rs 3
(Ohm)
VR = 0.5V VR = 2.0V VR = 4.0V Ct0.5/Ct4.0 V
R = 2.0 V
Typ. Min. Nom. Max. Typ. Typ. Typ. Max.
MA4ST1230 MA4ST1231
MAVR-001230-XXXXX 10.1 4.2 4.7 5.6 2.75 3.67 0.40 0.70
MA4ST1240 MA4ST1241
MAVR-001240-XXXXX 7.1 3.0 3.4 3.8 2.05 3.46 0.40 0.70
Part No.
Base1
0
2
4
6
8
10
12
012345
Biasing Vol tage (V)
Capacitance (pF
)
MA4ST1230/1231 /MAVR-001230
MA4ST1240/1241 /MAVR-001240
Specifications subject to change without prior notification
3
Low Tuning Voltage / Low Rs Silicon Hyperabrupt
Varactor Diode
Rev. V8
MA4ST1200 Series
• North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400
• India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588
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.
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.
Typical Capacitance Values Spice Model
VR (V) MA4ST1230 MA4ST1240
Ct (pF) Ct (pF)
0.5 10.170 7.016
1.0 7.839 5.424
1.5 6.062 4.213
2.0 4.840 3.370
2.5 4.053 2.829
3.0 3.527 2.466
3.5 3.155 2.208
4.0 2.877 2.016
4.5 2.661 1.865
5.0 2.488 1.746
MA4ST1230 1.1 12.7 3.136 2.6
MA4ST1240 1.1 8.65 3.170 2.6
Part Number N CJO
(pF) Vj
(V) M
C
p
Rs
C
j
Ls
Intrinsic Diode Model
N
=N
Cj0=Cj0
Vj=Vj
Fc=0.5
BV=20 V
M=M
Parasitic Cp & Ls
Are per A bove T a bl e
Specifications subject to change without prior notification
4
Low Tuning Voltage / Low Rs Silicon Hyperabrupt
Varactor Diode
Rev. V8
MA4ST1200 Series
• North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400
• India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588
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.
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.
Case Styles
SC-70, 3 Lead (Case Style 1146)
INCHES MILLIMETERS
DIM. MIN. MAX. MIN. MAX.
A 0.071 0.087 1.80 2.21
B 0.045 0.053 1.14 1.35
C 0.071 0.094 1.80 2.39
D 0.047 0.057 1.19 1.45
E 0.010 0.016 0.25 0.41
F 0.031 0.039 0.79 1.00
G 0.000 0.004 0.00 0.10
H 0.004 0.10
J 0.004 0.10
0.007
0.010 0.18
0.25
SOD-323 (Case Style 1141)
INCHES MILLIMETERS
DIM. MIN. MAX. MIN. MAX.
A ⎯ 0.043 ⎯ 1.1
B ⎯ 0.004 ⎯ 0.1
C ⎯ 0.008 ⎯ 0.2
D 0.010 0.016 0.25 0.41
E 0.003 0.006 0.07 0.15
F 0.063 0.075 1.6 1.9
G 0.045 0.057 1.14 1.45
H 0.091 0.106 2.3 2.7
F
D
H
G
CE
A
B
A
E
D
J
H
G
F
10°MAX.
CB
Specifications subject to change without prior notification
SC-79 (Case Style 1279)
INCHES MILLIMETERS
DIM. MIN. MAX. MIN. MAX.
A .0197 .0276 0.50 0.70
B 0.003 0.008 0.07 0.20
C 0.006 0.010 0.15 0.25
D 0.010 0.014 0.25 0.35
E 0.059 0.067 1.50 1.70
F 0.043 0.051 1.09 1.30
G .0098 nominal 0.250 nominal
H .0433 nominal
I .027 .035 0.68 0.89
1.10 nominal
5
Low Tuning Voltage / Low Rs Silicon Hyperabrupt
Varactor Diode
Rev. V8
MA4ST1200 Series
• North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400
• India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588
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.
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.
Mounting Information
The illustration indicates the recommended
mounting pad configuration for the SC-79, SOT-323
and SOD-323 packages. 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.
SC-70, 3 Lead (Case Style 1146)
0.030
0.80
0.030
0.80
0.030
0.80
0.075
1.9
0.030
0.80
inches
mm
Dimenstions:
SOD-323 (Case Style 1141)
0.030
0.80
.090
2.2
0.030
0.80
inches
mm
Dimenstions:
0.030
0.80
SC-79 (Case Style 1279)
0.020
0.50
0.053
1.35 inches
mm
Dimenstions:
0.020
0.50
Specifications subject to change without prior notification
