Features
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Low Series Resistance at Low Tuning Voltages
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High Capacitance Ratio at Low Tuning Voltages
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Surface Mount Plastic Packages : SC-79, SOD-323,
SC-70 ( 3L )
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SPC Process for Superior C vs V Repeatability
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.
Low Tuning Voltage/Low Rs Silicon
Hyperabrupt Varactor Diode
MA4ST1200 Series
V 2.00
Technical Parasitic Information
Package Type
Package Cp
( pF )
Package Ls
( nH )
SC-79
0.10
0.6
SOD-323
0.11
1.2
SC-70,
3 Lead
0.12
1.3
Ordering Information
Part Number
Configuration
Package
MA4ST12XX-1279T
Single
SC-79
MA4ST12XX-1141T
Single
SOD-323
MA4ST12XX-1146T
Common Cathode
SC-70 ( 3 L )
1
Absolute Maximum Ratings
@T
A
= +25 C
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
Low Tuning Voltage/Low Rs Silicon Hyperabrupt Varactor Diode
MA4ST1200 Series
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.
Visit www.macom.com for additional data sheets and product information.
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North America: Tel. (800) 366-2266
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Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
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Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
V 2.00
2
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
C
E
A
B
SC-79 (SOD-523)
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
0.043
0.94
1.09
D
E
F
Cathode
Mark
B
C
Seating
Plane
10
Max
A
10
Max
G
H
Topview
A
E
D
J
H
G
F
1 0
M A X .
C
B
Low Tuning Voltage/Low Rs Silicon Hyperabrupt Varactor Diode
MA4ST1200 Series
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.
Visit www.macom.com for additional data sheets and product information.
n
North America: Tel. (800) 366-2266
n
Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n
Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
V 2.00
Electrical Characteristics @ T
A
= +25 C
Breakdown Voltage @ I
R
= 10
A, V
b
= 12 V Minimum
Reverse Leakage Current @ V
R
=10V, I
R
= 100 nA Maximum
Part Number
Ct*
(pF)
Capacitance
Ratio
Rs**
(Ohm)
V
R
= 0.5 V
V
R
= 2.0 V
V
R
= 4.0 V
Ct
0.5
/Ct
4.0
V
R
= 2.0 V
Typ.
Min.
Nom.
Max.
Typ.
Typ.
Typ.
Max.
MA4ST1230
10.1
4.2
4.7
5.2
2.75
3.67
0.4
0.7
MA4ST1240
7.1
3.0
3.4
3.8
2.05
3.46
0.4
0.7
* Capacitance @ 1 MHz
** Series Resistance @ 100 MHz
Typical Capacitance Change vs. Temperature
Typical Capacitance vs. Biasing Voltage
Typical Rs vs Biasing Voltage*
3
-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
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Biasing Voltage (V)
Series Resistance (Ohm)
MA4ST1240
0
2
4
6
8
10
12
0
1
2
3
4
5
Biasing Voltage (V)
Capacitance (pF)
MA4ST1230
MA4ST1230
MA4ST1240
Low Tuning Voltage/Low Rs Silicon Hyperabrupt Varactor Diode
MA4ST1200 Series
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.
Visit www.macom.com for additional data sheets and product information.
n
North America: Tel. (800) 366-2266
n
Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n
Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
V 2.00
Typical Capacitance Values
V
R
(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
Spice Model
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
4
Cp
Rs
Cj
Ls
Intrinsic Diode Model
N=N
Cj0=Cj0
Vj=Vj
Fc=0.5
BV=20 V
M=M
Parasitic Cp & Ls
Are per Above Table
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