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
Low Tuning Voltage/Low Rs
Silicon Hyperabrupt Varactor Diode V3
MA4ST1200 Series
1
Features
Low Series Resistance at Low Tuning 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 ava ilable with
260°C reflow compatibility
Description
M/A-COM’s MA4ST1200 series is a highly repeatable,
UHCVD/ion-implanted, hyperabrupt silicon tuning varactor in a
cost effective surface mount package. 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 @ TA=+25 °C
(Unless Otherwise Noted) 1
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)
MA4ST1231-1279T Single SC-79 0.10 0.6
MA4ST1241-1279T Single SC-79 0.10 0.6
MA4ST1230-1141T MA4ST1231-1141T Single SOD-323 0.11 1.2
MA4ST1240-1141T 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
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
Low Tuning Voltage/Low Rs
Silicon Hyperabrupt Varactor Diode V3
MA4ST1200 Series
2
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
Part Number
Base
RoHs Compliant
Part Number Base1
Ct
(pF)2 Capacitance
Ratio Rs3
(Ohm)
VR = 0.5V VR = 4.0V Ct0.5/Ct4.0 VR = 2.0 V
Typ. Min. Nom. Max. Typ. Typ. Typ. Max.
MA4ST1230 MA4ST1231 10.1 4.2 4.7 5.2 2.75 3.67 0.40 0.70
MA4ST1240 MA4ST1241 7.1 3.0 3.4 3.8 2.05 3.46 0.40 0.70
VR = 2.0V
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
2
4
6
8
10
12
012345
Biasing Vol tage (V)
Capacitance (pF
)
MA4ST1230/1231
MA4ST1240/1241
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
MA4ST1230/1231
Typical Rs vs Biasing Voltage3
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
Low Tuning Voltage/Low Rs
Silicon Hyperabrupt Varactor Diode V3
MA4ST1200 Series
3
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
Part Number N CJO
(pF) Vj
(V) M
MA4ST1230 1.1 12.7 3.136 2.6
MA4ST1240 1.1 8.65 3.170 2.6
C
p
Rs
C
j
Ls
Intrin si c Di ode Model
N
=N
Cj0=Cj0
Vj=Vj
Fc=0.5
BV=20 V
M=M
Parasitic Cp & Ls
Are per Above Table
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
Low Tuning Voltage/Low Rs
Silicon Hyperabrupt Varactor Diode V3
MA4ST1200 Series
4
Case Styles
SC-70, 3 Lead
Case Style 1146
INCHES MILLIMETERS
DIM. MIN. MAX. MIN. MAX.
A 0.071 0.087 1.80 2.20
B 0.045 0.053 1.15 1.35
C 0.071 0.094 1.80 2.40
D 0.047 0.057 1.19 1.45
E 0.010 0.016 0.25 0.41
F 0.031 0.039 0.80 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 0.4
E 0.003 0.006 0.08 0.15
F 0.063 0.075 1.6 1.9
G 0.045 0.057 1.15 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
SC-79
Case Style 1279
INCHES MILLIMETERS
DIM. MIN. MAX. MIN. MAX.
A 0.020 0.028 0.50 0.71
B 0.003 0.008 0.08 0.20
C 0.006 0.010 0.15 0.25
D 0.010 0.014 0.25 0.36
E 0.059 0.067 0.08 0.15
F 0.043 0.051 1.50 1.30
G 0.011 0.012 0.28 0.30
H 0.037
typical 0.043 0.94 1.09
D
E F
Cathode
Mark
B
C
Seating
Plane
10° Max
A
10° Max
G H
Topview
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
Low Tuning Voltage/Low Rs
Silicon Hyperabrupt Varactor Diode V3
MA4ST1200 Series
5
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.
SOT-323
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
0.030
0.80
.090
2.2
0.030
0.80
inches
mm
Dimenstions:
0.030
0.80
SC-79
0.020
0.50
0.053
1.35 inches
mm
Dimenstions:
0.020
0.50